Multifunctional bacteria  represent a revolutionary approach to plant nutrition and defense, simultaneously executing multiple plant growth-promoting mechanisms that work synergistically to transform plant health and productivity. These bacterial strains possess the genetic and metabolic capacity to perform several beneficial functions concurrently, creating a comprehensive support system for plant development. Direct and indirect mechanisms of PGPRs( source ) Core Mechanisms of Multifunctional Bacteria Nitrogen Fixation Multifunctional bacteria convert atmospheric nitrogen (N₂) into ammonia through the nitrogenase enzyme complex 1 . This process provides plants with a direct, sustainable nitrogen source, reducing dependence on synthetic fertilizers. Genera like Azotobacter , Azospirillum , and Rhizobium  can fix substantial amounts of nitrogen while simultaneously performing other beneficial functions 1 . Phosphate and Potassium Solubilization These bacteria release organic acids (gluconic, citric, oxalic acids) that convert insoluble phosphates and potassium minerals into plant-available forms ( 3 , 4 ) . Bacillus  species are particularly effective phosphate solubilizers, with some strains capable of producing up to 230 mg/L of soluble phosphate 1 . This dual nutrient mobilization capability significantly enhances plant nutrient uptake efficiency. Phytohormone Production Multifunctional bacteria synthesize essential plant growth regulators including: Indole-3-acetic acid (IAA) : Promotes root elongation and cell division Cytokinins : Stimulate cell division and delay senescence Gibberellins : Enhance stem elongation and flowering ( 3 , 5 ) Studies show that bacterial IAA can increase root length by 35-50% compared to uninoculated plants ( 6 ) . Hydrolytic Enzyme Secretion These bacteria produce an arsenal of hydrolytic enzymes that serve dual purposes: Cellulase and β-glucosidase : Break down cellulose for carbon cycling Protease : Degrades proteins for nitrogen release Chitinase : Attacks fungal cell walls for pathogen suppression Phosphatase : Releases phosphorus from organic compounds ( 7 , 8 ) This enzymatic activity simultaneously provides plant defense against pathogens and enhances nutrient cycling in the rhizosphere ( 9 ) . Synergistic Mechanisms Transform Plant Nutrition Coordinated Nutrient Acquisition Multifunctional bacteria like A. lipoferum and P. fluorescens create a synergistic nutrient acquisition system where nitrogen fixation, phosphate solubilization, and potassium mobilization work together without competitive inhibition ( 10 ) . This coordinated approach ensures plants receive balanced nutrition, with studies showing up to 41.61% increases in plant nitrogen content when multiple mechanisms operate simultaneously( 10 ) . Growth Promotion with Stress Tolerance The combination of phytohormone production and ACC deaminase activity creates optimal growth conditions ( 6 ) . While bacterial IAA promotes growth, ACC deaminase prevents excessive ethylene production that would inhibit growth under stress conditions. This synergy allows plants to maintain growth even under challenging environmental conditions ( 11 ) . ( source ) Enhanced Root Development System Multifunctional bacteria significantly improve root architecture through multiple pathways: Phytohormones  stimulate root elongation and branching Phosphate solubilization  provides phosphorus essential for root development Biofilm formation  protects expanding root systems from pathogens ( 3 ) Studies demonstrate that multifunctional bacteria like Bacillus thuringiensis can increase root length by 1.55-fold, root surface area by 1.78-fold, and root volume by 2.05-fold ( 3 ) . Defense System Integration Multi-layered Pathogen Suppression Multifunctional bacteria create comprehensive plant protection through: Direct antagonism : Hydrolytic enzymes degrade pathogen cell walls Siderophore production : Competes with pathogens for iron Induced systemic resistance : Primes plant defense responses Biofilm formation : Creates physical barriers against pathogens ( 12 , 13 ) Quorum Sensing Coordination Bacterial quorum sensing systems coordinate the expression of multiple beneficial traits, ensuring optimal timing and intensity of various mechanisms ( 14 ) . This coordination prevents resource waste and maximizes beneficial effects on plant health ( 15 ) . Practical Applications for Cannabis Cultivation Enhanced Cannabinoid Production Recent research demonstrates that multifunctional PGPR can significantly enhance cannabis secondary metabolite production. Mucilaginibacter  sp. increased total CBD by 11.1% and THC by 11.6%, while also improving flower dry weight by 24% 16 . The combination of nutrient mobilization and stress tolerance mechanisms creates optimal conditions for cannabinoid biosynthesis. Reduced Input Requirements Multifunctional bacteria can reduce fertilizer needs by up to 30-40% while maintaining or improving yields ( 10 ) . For cannabis cultivation, this translates to: Lower production costs Reduced environmental impact Enhanced product quality through balanced nutrition( 17 , 18 ) Improved Stress Resilience Cannabis plants inoculated with multifunctional bacteria show enhanced tolerance to environmental stresses including drought, salinity, and temperature fluctuations ( 19 ) . This resilience is crucial for consistent high-quality cannabis production. ( source ) Transformative Impact on Plant Agriculture Multifunctional bacteria represent a paradigm shift from single-function microbial inoculants to comprehensive plant support systems. By simultaneously addressing nutrition, growth promotion, and defense, these bacteria create a self-sustaining rhizosphere ecosystem that enhances plant productivity while reducing external inputs. The synergistic nature of these mechanisms means that the combined effect exceeds the sum of individual functions, making multifunctional bacteria particularly valuable for sustainable, high-performance agriculture. For cannabis cultivation specifically, these bacteria offer the potential to enhance both yield and quality while supporting environmentally responsible production practices. This multifunctional approach aligns perfectly with the principles of regenerative agriculture and sustainable cultivation, making it an essential tool for modern cannabis production systems seeking to optimize plant health, productivity, and environmental stewardship. Primary Research Articles Plant Growth-Promoting Bacteria (PGPR) - Core Studies Glick, B.R.  (2012). Plant growth-promoting bacteria: mechanisms and applications. Scientifica , 2012. PMC38204931 Hayat, R., et al.  (2010). Soil beneficial bacteria and their role in plant growth promotion: a review. Annals of Microbiology , 60(4), 579-598. DOI: 10.1007/s13213-010-0117-1 2 Kloepper, J.W., et al.  (2013). Plant growth-promoting rhizobacteria (PGPR): Their potential as antagonists and biocontrol agents. Journal of Plant Pathology , 31(2), 190-209. PMC35714253 Multifunctional Microorganisms in Agriculture Rezende, C.C., et al. (2023). Use of multifunctional microorganisms in corn crop. Revista Caatinga, 36(2), 302-314. DOI: 10.1590/1983-21252023v36n201rc4 Rezende, C.C., et al. (2021). Multifunctional microorganisms: use in agriculture. Research, Society and Development, 10(2), e50810212725. DOI: 10.33448/rsd-v10i2.127255 Bacterial Multifunctionality and Soil Health Wang, C., et al. (2024). Bacteria drive soil multifunctionality while fungi are effective only at low pathogen abundance. Science of the Total Environment, 906, 167596. DOI: 10.1016/j.scitotenv.2023.1675966 Boubekri, K., et al. (2022). Multifunctional role of Actinobacteria in agricultural production sustainability: A review. Microbiology Research, 261, 127059. DOI: 10.1016/j.micres.2022.1270597 Specific Bacterial Strains and Mechanisms Azospirillum and Nitrogen Fixation Cassán, F., et al. (2020). Azospirillum brasilense Az39 and Bradyrhizobium japonicum E109, inoculated singly or in combination, promote seed germination and early seedling growth in corn. European Journal of Soil Biology, 45, 28-35 8 Bacillus Species Applications Yadav, B.K. & Tarafdar, J.C. (2011). Efficiency of Bacillus coagulans as P biofertilizer to mobilize native soil organic and poorly soluble phosphates and increase crop yield. Communications in Soil Science and Plant Analysis. DOI: 10.1080/03650340.2011.575064 9 Rhizobium and Legume Symbiosis Postgate, J.R. (1982). The fundamentals of nitrogen fixation. Cambridge University Press 10 Beijerinck, M.W. (1901). Über oligonitrophile Mikroben. Zentralblatt für Bakteriologie, 7, 561-582 10 Application-Specific Research Biocontrol and Nematode Management Applied Microbiology and Biotechnology (2017). Bacterial strains for root-knot nematode control. Applied Microbiology and Biotechnology, 101(7). DOI: 10.1007/s00253-017-8175-y 11 Tomato and Vegetable Production Characterization of plant growth promoting bacteria isolated from rhizosphere of tomato plants (2025). Scientific Reports, 15, 1847. [DOI: 10.1038/s41598-025

Conventional mineral fertilizers, while instrumental in achieving up to 50% of global agricultural yield increases over the past century, face critical inefficiencies and environmental challenges.  Nitrogen fertilizers exhibit notoriously low nutrient use efficiency (NUE), with approximately 50% of applied nitrogen lost through leaching, volatilization, or runoff, leading to annual economic losses exceeding $15 billion USD.  Phosphorus applications often exceed crop demands, particularly when animal manures are used to meet nitrogen requirements, resulting in soil phosphorus accumulation and subsequent runoff—a primary driver of aquatic eutrophication affecting over 400 hypoxic zones worldwide. ( source )  The spatial-temporal mismatch between nutrient release and plant uptake exacerbates losses, with only 20-30% of applied phosphorus utilized by crops.  Environmentally, fertilizer-derived nitrous oxide (N₂O) accounts for 6% of global greenhouse gas emissions, while nitrate contamination affects 20% of groundwater sources in intensive agricultural regions.  ( source )  Soil degradation compounds these issues, with excessive sodium from fertilizers displacing calcium and magnesium in 12% of global croplands, degrading soil structure and reducing hydraulic conductivity. The agricultural industry stands on the brink of a transformative revolution as nano fertilizers emerge as a superior alternative to conventional fertilization methods.  Unlike traditional fertilizers that suffer from low bioavailability and significant nutrient losses, nano fertilizers deliver unprecedented efficiency through controlled release mechanisms and targeted nutrient delivery.  These advanced formulations enhance nutrient use efficiency by up to 80%, while requiring dramatically lower application rates—replacing up to 25 kg of conventional urea with just one liter of nano fertilizer.  The technology addresses critical challenges in modern agriculture by improving crop productivity, reducing environmental degradation, and supporting sustainable farming practices through enhanced bioavailability and precision nutrient management. Understanding Nutrient Availability in Plants Nutrient availability represents the fundamental cornerstone of agricultural productivity, directly determining plant growth, development, and crop yields.  The Soil Science Society of America ( https://www.soils.org/ )  defines available nutrients as "the amounts of soil nutrients in chemical forms accessible to plant roots or compounds likely to be convertible to such forms during the growing season".  This concept encompasses not merely the presence of nutrients in soil, but their accessibility and uptake efficiency by plant root systems. Cation Exchange Dynamics and Soil Fertility A critical factor influencing nutrient availability is the cation exchange capacity (CEC)  of soils, which measures the soil’s ability to retain and exchange positively charged ions (cations) such as Ca²⁺, Mg²⁺, K⁺, and NH₄⁺3.  CEC arises from negatively charged sites on clay minerals, organic matter, and oxides, which attract and hold cations. Soils with high CEC (e.g., montmorillonite clays or organic-rich Histosols) retain nutrients more effectively, reducing leaching losses.  However, conventional fertilizers often fail to align with soil CEC dynamics, leading to imbalances.  For instance, excessive Na⁺ can displace Ca²⁺ and Mg²⁺ in sodic soils, degrading soil structure and hydraulic conductivity. The process of cation exchange in soil. From Smith and Smith (2015) Elements of Ecology (9th Edition). Pearson, Boston Nano fertilizers address these limitations through their unique interaction with soil exchange sites .  Their nanoscale size (1–100 nm) and charged surfaces enhance mobility and access to cation exchange sites, ensuring nutrients remain bioavailable even in soils with variable CEC.  For example, nano-encapsulated potassium (K⁺) avoids fixation in clay interlayers, a common issue with conventional K fertilizers, thereby improving root uptake and reducing nutrient losses through leaching. Challenges with Conventional Fertilizers Conventional fertilization systems face numerous limitations that compromise both agricultural productivity and environmental sustainability. Traditional fertilizers typically exhibit low bioavailability, with significant portions of applied nutrients lost through leaching, volatilization, and runoff before plants can effectively utilize them. These inefficiencies result in substantial economic losses for farmers and widespread environmental degradation. The nutrient use efficiency of conventional fertilizers remains disappointingly low across most agricultural systems.  Nitrogen fertilizers, for instance, suffer from losses through nitrate leaching, denitrification, and ammonia volatilization, leading to both economic waste and environmental pollution.  Studies indicate that as much as 50% of applied nitrogen fertilizer may be lost to the environment rather than being utilized by target crops. Similarly, phosphorus applications often exceed plant requirements, particularly when animal manures are applied to meet nitrogen demands, resulting in excessive phosphorus accumulation in soils. Different nitrogen fertilisers follow different pathways in the nitrogen cycle and different numbers of hydrogen ions are released. Source: DPIRD . The Science Behind Nano Fertilizers Nano fertilizers represent a paradigm shift in agricultural nutrition, utilizing nanotechnology to manipulate nutrient delivery at the molecular scale.  These innovative formulations consist of essential plant nutrients encapsulated within or combined with nano-dimensional adsorbents, creating particles typically ranging from 1 to 100 nanometers in size.  The nanoscale engineering enables unprecedented control over nutrient release patterns and plant uptake mechanisms. Nano Fertilizer Formulations and Mechanisms IndoGulf BioAg’s nano fertilizer portfolio exemplifies this innovation: Nano Urea : Encapsulates ammoniacal nitrogen in bio-polymers, replacing 25 kg of urea per liter while enhancing nitrogen-use efficiency by 80% Nano Phosphorus : Utilizes mono sodium phosphate in chitosan-based matrices to prevent soil fixation, ensuring 100% water solubility and immediate plant uptake. Nano Potassium : Delivers K⁺ in nano-encapsulated forms, optimizing enzyme activation and drought resistance while reducing application rates by 40–60% compared to conventional KCl. These formulations leverage bio-encapsulation  and colloidal stability  to protect nutrients from environmental degradation and ensure homogeneous distribution in soil or foliar sprays.  For instance, nano calcium’s chitosan-based polymer strengthens cell walls and mitigates heat stress by optimizing stomatal function, addressing deficiencies more effectively than bulk calcium carbonate that is often a low mobility mineral. The relationship between particle size and surface area. (source ) Superior Benefits of Nano Fertilizers Nano fertilizers demonstrate remarkable advantages over conventional fertilization methods across multiple performance metrics. The superior bioavailability achieved through nanotechnology ensures that nearly 100% of applied nutrients become immediately accessible to plants through both root and foliar uptake pathways.  This enhanced availability translates directly into improved nutrient use efficiency, with studies showing up to 80% increases in nitrogen utilization compared to conventional urea applications. Synergy with Cation Exchange Processes The charged surfaces of nano fertilizers enhance their interaction with soil CEC sites. For example, nano iron   (Fe³⁺) particles, stabilized by organic acids, resist oxidation and remain bioavailable in high-pH soils where traditional iron sulfates would precipitate.  Similarly, nano boron ’s ionized form bypasses soil adsorption, directly addressing deficiencies in crops like oil palm and citrus, which are highly susceptible to boron scarcity. Routes of nanoparticles through roots and leaf - “Image adapted from Wang et al. [ 18 ], Wang P, Yin H. Nanoparticles in plants: uptake, transport and physiological activity in leaf and root. Materials, [MDPI], [2023]. Environmental and Economic Advantages Nano fertilizers offer substantial environmental benefits that address many of the sustainability challenges associated with conventional agriculture.  The enhanced nutrient use efficiency significantly reduces the quantity of fertilizers required, with estimates suggesting that nano fertilizers can replace conventional applications at rates of 40 kg per hectare compared to 200 kg per hectare for traditional fertilizers.  This dramatic reduction in application rates directly translates to decreased environmental impact through reduced nutrient losses to surrounding ecosystems. Water quality protection represents a major environmental advantage of nano fertilizer adoption. The controlled release characteristics and improved plant uptake efficiency minimize nitrate leaching into groundwater and phosphorus runoff into surface waters. By reducing these nutrient losses, nano fertilizers help prevent eutrophication of aquatic systems and contamination of drinking water supplies, addressing two critical environmental challenges associated with intensive agriculture. Future of Sustainable Agriculture The integration of nano fertilizers into mainstream agricultural systems represents a crucial step toward achieving global food security while maintaining environmental sustainability.  As the world's population continues to grow, the demand for increased food production intensifies, yet this must be balanced against the need to protect natural resources and ecosystem health.  Nano fertilizers offer a technological solution that addresses both imperatives simultaneously. Innovations in Smart Nutrient Delivery Emerging technologies include stimuli-responsive nano-carriers  that release nutrients in response to soil moisture, pH, or enzymatic activity . For example, nano silica formulations enhance drought tolerance by improving water retention in plant tissues, while nano copper particles activate systemic acquired resistance (SAR) against fungal pathogens. These advancements underscore the potential of nano fertilizers to revolutionize precision agriculture, ensuring nutrients are delivered precisely when and where plants need them. IndoGulf BioAg produces a full range of nano fertilizers utilizing our proprietary in-house technology, contact us for more information. Conclusion Nano fertilizers represent a transformative advancement in agricultural technology, offering superior nutrient availability and delivery compared to conventional fertilization methods. Through precise control of nutrient release, enhanced bioavailability, and targeted delivery mechanisms, these innovative formulations address the critical challenges of modern agriculture while supporting environmental sustainability. By harmonizing with soil cation exchange dynamics and leveraging nanotechnology’s unique properties, nano fertilizers are poised to revolutionize global agriculture, enabling increased food production while protecting the natural resources upon which future generations depend. Scientific Resources Examining the Correlation Between Nano-Fertilizer Physical Properties and Crop Performance PMC Article Physical Properties of Nano-Fertilizers: Impact on Nutrient Use Efficiency PubMed Study Nanofertilizers for Sustainable Agriculture (PDF) United Nations SDG Report Nano-Fertilizers: Revolutionizing Agriculture for Sustainable Crop Growth (PDF) ResearchFloor Review Nitrogen Leaching: Causes and Mitigation Strategies Smart Nitrogen Guide Advances in Nanofertilizer Technology ACS Agricultural Science & Technology Nanofertilizers: Opportunities and Challenges (Preprint) Preprints.org

Xylella fastidiosa  (Xf) is a vector-transmitted bacterial pathogen that poses a significant threat to global agriculture and ecosystems. The bacterium colonizes the xylem vessels of plants, which are responsible for water transport. This colonization leads to blockage, causing symptoms such as leaf scorching, desiccation, and ultimately, plant death. It is the causal agent of numerous severe plant diseases, including Pierce’s disease in grapevines, citrus variegated chlorosis in citrus, and Olive Quick Decline Syndrome (OQDS ) . The pathogen's spread has resulted in an estimated annual economic impact of €5.5 billion in Europe alone. Global Distribution and Spread Historically considered a pathogen confined to the Americas, Xylella fastidiosa  has overcome geographical barriers, likely through the global trade of plant materials, and is now established in multiple countries across Europe and Asia . Americas : The bacterium is widespread throughout North, Central, and South America, where it affects a wide range of crops and native plants. Asia : In recent years, Xf has been reported in several Asian countries, including Iran, Israel, and Lebanon. In 2024, first reports emerged from continental China and in 2025 from Iraq and Colombia. A distinct but related species, Xylella taiwanensis , is known to cause pear leaf scorch in Taiwan, where X. fastidiosa  subsp. fastidiosa  is also present. Europe : The pathogen was first detected in the European Union in 2013 in Apulia, Southern Italy. This constituted a major change in its known geographical distribution. Official surveys have since confirmed its presence in demarcated areas of France, Spain, and Portugal . The European Outbreak The arrival of Xylella fastidiosa  in Europe has had a devastating ecological and economic impact, particularly in Southern Italy's olive industry, where OQDS has led to the death and uprooting of millions of olive trees . .Symptoms caused by Xylella fastidiosa on olive in Apulia-South Italy: (A) initial symptoms on young trees, (B) leaves scorch (detail), (C) quick decline on olives, (D) dead olive tree (photo by Trkulja) . Pathogen Subspecies and Vectors   Of the six known subspecies of X. fastidiosa  worldwide, four have been recorded in Europe: fastidiosa , multiplex , pauca , and sandyi . Transmission within Europe is primarily attributed to insects of the Aphrophoridae family (spittlebugs) . Adult spittlebugs, sometimes called froghoppers, resemble stubby leafhoppers and are generally tan to brown or gray. ( source ) While the primary vectors in the Americas are sharpshooter leafhoppers (subfamily Cicadellinae), in Europe the meadow spittlebug, Philaenus spumarius , is the main confirmed vector. This species is common, widespread, and feeds on a wide variety of plants, making it a highly effective transmitter. Neophilaenus campestris  is also a confirmed vector, and in January 2025, Mesoptyelus impictifrons  was identified as a new vector in the EPPO region. All xylem-sap feeding insects are considered potential vectors, and research is ongoing to identify other species that may contribute to the pathogen's spread. Regulatory and Research Framework in the European Union In response to the threat, the EU has classified Xylella fastidiosa  as a priority quarantine pest, with strict measures in place to prevent its introduction and spread . Containment and Eradication Measures   Under Commission Implementing Regulation (EU) 2020/1201, member states must establish demarcated areas upon detecting the pathogen. These consist of an "infected zone" and a surrounding "buffer zone" . Control strategies focus on containment and prevention, as there is no known cure for infected plants. Measures include the removal of all infected plants and the control of insect vector populations. The buffer zone is typically 2.5 km for eradication efforts and was historically 5 km for containment areas where the pest is established . In July 2024, the European Commission proposed an update to these rules, suggesting a reduction of the mandatory survey area in containment zones from 5 km to 2 km to facilitate replanting. The proposal also aims to expand the list of high-risk host plants under surveillance to include specific species of lavender and rosemary, which have been frequently found infected. Based on the comprehensive research gathered, I'll now write a separate paragraph on vector control for the Xylella fastidiosa context. Vector Control Strategies for Xylella fastidiosa Management Effective vector control represents the cornerstone of Xylella fastidiosa  management strategies, given the absence of curative treatments for infected plants.  The primary focus centers on managing populations of xylem-feeding insects, particularly spittlebugs of the Aphrophoridae family, with Philaenus spumarius  serving as the main confirmed vector in Europe2 1 . Vector control approaches encompass three complementary strategies: biological control, chemical control, and cultural management practices. Biological control methods have demonstrated significant promise in field applications. The entomopathogenic fungus Metarhizium brunneum  has emerged as a particularly effective biocontrol agent, with field trials showing remarkable efficacy rates of 100% for nymph control and 85% for adult spittlebug populations in olive groves .  The fungus can be applied as a soil treatment, where it persists in the environment and colonizes plants endophytically, providing sustained vector control .  Additionally, classical biological control using natural predators shows potential, with the predatory bug Zelus renardii  identified as an effective predator of P. spumarius , functioning as a "living insecticide" when deployed in inundation strategies . Laboratory studies indicate that such biocontrol approaches can reduce pathogen incidence below 10%, offering an environmentally sustainable alternative to chemical intervention. Chemical control remains a critical component of integrated vector management, particularly through targeted insecticide applications timed to coincide with vector activity periods .  Plant-based formulations have shown considerable promise, with hot pepper-infused oil combined with Salvia guaranitica  extracts achieving mortality rates of up to 100% in spittlebug adults, rivaling the effectiveness of synthetic insecticides like deltamethrin.  Systemic insecticides applied as preventive treatments to olive trees can provide protection against vector transmission, with the dual benefit of killing vectors upon feeding and reducing overall transmission potential. Cultural management practices provide the foundation for sustainable vector population suppression. Ground cover management through tillage operations has proven particularly effective, reducing P. spumarius  populations by up to 60% compared to control plots, while frequent mowing achieves only modest reductions of approximately 20% . These practices work by disrupting the vector's life cycle, destroying overwintering eggs and nymphs, and eliminating the herbaceous vegetation required for spittlebug development.  Controlled burning, soil preparation through discing or raking, and strategic grazing management can further reduce vector habitat suitability by altering microclimate conditions and removing protective litter layers.  The integration of these approaches within a comprehensive management framework offers the most promising pathway for sustainable Xylella fastidiosa  vector control, balancing efficacy with environmental sustainability and agricultural practicality . EU-Funded Research   The EU has invested significantly in research to combat the pathogen through framework programs like Horizon 2020 and Horizon Europe. Major projects such as XF-ACTORS, POnTE, BIOVEXO, and BeXyl aim to deepen the understanding of the bacterium , develop advanced control strategies, and provide tools for risk assessment and policy-making. These initiatives focus on the pathogen's biology, its interaction with vectors, and the development of sustainable management solutions. Future Outlook and Global Challenges The spread of Xylella fastidiosa  is influenced by environmental conditions. Climate change models predict that rising global temperatures will increase the risk of the pathogen establishing itself further north in Europe, beyond the Mediterranean basin . A global temperature increase of 3°C has been identified as a potential tipping point that could dramatically expand the pathogen's viable range. The continued detection of Xf in new countries underscores the persistent risk posed by the international movement of plants and the need for robust global surveillance and biosecurity protocols. Key Sources for Scientific Articles on Xylella fastidiosa International Plant Protection Convention (IPPC) Factsheet: Facing the threat of Xylella fastidiosa together Comprehensive overview of Xylella’s biology, global distribution, host range, and economic impact. Cornara et al. “Vectors of Xylella fastidiosa around the world: an overview” In‐depth review of insect vectors, transmission biology, and implications for pathogen spread. Sanna et al. “A biological control model to manage the vector and the infection of Xylella fastidiosa on olive trees” (PLOS ONE) Peer-reviewed study on use of Metarhizium brunneum and Zelus renardii biocontrol agents in olive groves. Commission Implementing Regulation (EU) 2020/1201EU legal framework for demarcated infected and buffer zones, eradication and containment measures. “Xylella fastidiosa in Europe: From the Introduction to the Current Status” (PMC)Scientific review of outbreaks, host range, subspecies in Europe, and current control strategies.

Arbuscular mycorrhizal fungi (AMF) are beneficial soil microorganisms that form symbiotic “fungus-root” associations with plants – including grapevines (Vitis vinifera). In this mutualistic partnership, the fungus (especially species like Rhizophagus intraradices , formerly Glomus intraradices ) colonizes vine roots and extends a network of microscopic hyphae into the soil. The grapevine supplies the fungus with sugars, and in return the AMF greatly enhances the plant’s ability to absorb hard-to-acquire nutrients (particularly phosphorus and micronutrients) and water. This relationship is widespread and natural in vineyards – most grapevines in the field host AMF in their roots, which act as a living extension of the root system. Research has shown that this symbiosis can significantly improve grapevine performance, from better vine growth and drought tolerance to higher yields and transplant success. Below, we summarize how AMF (with a focus on R. intraradices ) benefits grapevines and provide practical guidance for leveraging this fungus in vineyard management, particularly in North American growing conditions. Enhanced Nutrient Uptake Phosphorus (P) is a critical macronutrient for vines, yet in many soils P is present in forms that are not easily accessible to roots. R. intraradices  addresses this by sending out extremely fine hyphae that explore a much greater soil volume than roots alone, scavenging phosphate ions beyond the root depletion zone. The fungus effectively acts as a living pipeline for phosphorus: it transports P back to the root and delivers it to the plant at specialized root structures called arbuscules. Mycorrhizal grapevines often show dramatically higher P uptake and tissue P levels than non-mycorrhizal vines – for example, one experiment found foliar P content almost doubled  in AMF-inoculated grapevines compared to uninoculated controls (with associated increases in zinc, copper, and iron in the leaves as well). AMF hyphae also secrete enzymes and organic acids that help solubilize bound phosphates in the soil, further boosting nutrient availability. Notably, the benefits of AMF are greatest in low-P conditions: in nutrient-poor soils, a well-colonized vine can thrive where it might otherwise suffer P deficiency, sometimes reducing the vine’s external P fertilizer needs by an order of magnitude. (Conversely, in very high-P soils grapevines tend to down-regulate mycorrhizal colonization, as the plant doesn’t need the extra help.) In essence, R. intraradices  serves as a natural biofertilizer, greatly extending the grapevine’s nutrient foraging ability in the soil. Diagrammatic summary showing the impact of roots hairs or arbuscular mycorrhizal fungal hyphae on phosphorus uptake from the soil. Compare the upper and lower pairs of drawings to see how soil hyphae increase the size of phosphorus depletion zones in soil much more if plants lack highly branched roots with long root hairs. (Based on Brundrett et al. 1996) Arbuscular Mycorrhizal Fungi and Improved Water Uptake and Drought Resilience Beyond nutrients, R. intraradices  symbiosis also enhances the vine’s water uptake and drought tolerance. The fungal hyphal network can access water from soil pores too small for roots, effectively increasing the absorptive surface area for water. In drought-prone regions or during dry spells, mycorrhizal vines consistently maintain better water status than their non-mycorrhizal counterparts. For instance, in controlled experiments, grapevines inoculated with AMF showed significantly less negative leaf water potential (indicating less water stress), higher stomatal conductance, and higher photosynthesis rates under drought compared to uninoculated vines. Part of this improved drought resilience comes indirectly from better nutrition – AMF-inoculated vines had superior P status, which helps sustain root growth and stomatal function during water stress. Additionally, the fungus can alter root system architecture and deposit glomalin (a fungal glycoprotein) in soils, which improves soil structure and moisture retention around the roots. The overall outcome is that AMF-colonized grapevines are more “drought-avoidant,” sustaining higher tissue water content and physiological activity under water-limited conditions than vines without AMF. This trait is increasingly valuable as many wine regions face greater water scarcity or rely on deficit irrigation. Climate‑change context for AMF adoption  —A recent Chilean review highlights that Vitis vinifera  production is already constrained by declining irrigation water (an estimated 95 % of vineyards report shortages ) and mounting disease pressure as temperatures rise. The authors conclude that arbuscular mycorrhizal fungi (AMF) can serve as a “biotechnological tool” to buffer both abiotic stress  (by improving water and P/N uptake and sustaining photosynthesis during drought) and biotic stress  (by triggering mycorrhiza‑induced resistance against trunk pathogens, nematodes and viruses). They also stress the importance of sourcing locally adapted AMF isolates  to protect native biodiversity and maximise symbiotic efficiency under regional soil–climate conditions. Key Benefits of AMF for Grapevine Health and Productivity By partnering with AMF, grapevines reap a range of growth and health benefits. Agronomic studies comparing mycorrhizal and non-mycorrhizal vines have documented the following improvements: Vigor and Nutrient Status:  Mycorrhizal vines develop more robust root systems and canopies thanks to improved nutrition. In one trial, R. intraradices -inoculated Cabernet Sauvignon vines had ~75% greater root dry weight than uninoculated vines, along with nearly double the leaf P concentration and 2–3× higher leaf nitrogen. These nutrient boosts translate into greener leaves (higher chlorophyll) and a more vigorous vine canopy. Better Transplant Success:  AMF inoculation helps young vines overcome transplant shock. In a study with micropropagated grapevine plantlets, those treated with R. intraradices  had almost double the survival rate after weaning compared to controls, and showed faster growth (greater height, biomass, leaf area) within the first two months. Establishing mycorrhizae early ensures the vine quickly regains nutrient and water uptake capacity in field conditions, leading to higher transplant success. Stress Tolerance (Drought, Nutrient, Disease):  Mycorrhizal symbiosis makes vines more resilient to environmental stresses. As noted, AMF-colonized vines maintain higher stomatal conductance and hydration under drought stress. In low-fertility soils, AMF help buffer nutrient deficiencies so vines are less likely to exhibit stress symptoms. There is even evidence that AMF can induce resistance to certain root pathogens – for example, vineyards with healthy AMF populations have shown lower incidence of “black foot” root disease, as the fungal symbiosis improves root health and defensive capacity. Overall, AMF acts as a biostimulant, helping vines tolerate drought, nutrient scarcity, and some diseases more effectively. Higher Yields and Fruit Quality:  Perhaps most importantly for growers, AMF can boost crop productivity. In field trials, grapevines inoculated with AMF produced significantly more grape clusters per vine and higher overall yield than non-inoculated vines. In one two-year study on Cabernet Sauvignon, mycorrhizal vines yielded about 25–30%  more fruit (by weight) compared to controls. Crucially, this yield increase comes without sacrificing fruit quality. Mycorrhizal vines in the same study also had higher concentrations of phenolic compounds in the grapes – including ~25% more skin anthocyanins – which enhance wine color, flavor, and antioxidant content. Other trials similarly report equal or improved grape quality (e.g. balanced sugars and acids, nutrient-rich must) in AMF-treated vines. The net effect is that a well-colonized vine can ripen a full crop with adequate sugar while also improving flavor and metabolite profiles, meaning growers get both more fruit and better fruit. Source: Arbuscular mycorrhiza symbiosis in viticulture: a review. AMF in Low-Phosphorus Vineyard Soils (North America) Many vineyard soils in North America have inherently low available phosphorus, making AMF symbiosis especially valuable. Regions such as parts of Washington and Oregon (with volcanic or weathered soils), coastal California, British Columbia’s Okanagan, and even certain Ontario vineyards often report low soil P levels or tightly bound P that vines can’t easily access. In these low-P scenarios, grapevines rely heavily on mycorrhizal fungi to meet their P needs. Vines in “low P” blocks can maintain adequate tissue P and show no deficiency symptoms largely because  of AMF foraging. Field observations back this up: for example, researchers in Oregon’s Willamette Valley noted that low soil P availability did not translate to low vine P status where AMF were present, underscoring that native mycorrhizae were helping vines get by. That said, AMF are not a panacea for extreme depletion – if soil P drops below critical thresholds (e.g. <5 ppm extractable P), even mycorrhizal vines may become P-deficient and struggle with stunted growth and poor fruit set. In such cases, growers should consider both inoculating with AMF and applying modest P inputs to build soil fertility. The key point is that R. intraradices  is most beneficial in P-impoverished soils – under those conditions, inoculation can dramatically improve vine P uptake and growth, whereas in high-P soils the vine gains little extra from the fungus. Relying on AMF for phosphorus not only supports vine nutrition but also has environmental benefits, potentially reducing the need for heavy P fertilizer applications (and thus lowering the risk of phosphate runoff into waterways). Application: Inoculation Timing and Methods When and How to Inoculate:   The optimal time to introduce R. intraradices  into a vineyard is at planting or during early root development. For new vineyard establishments, this means inoculating young vines (dormant rooted cuttings or potted nursery vines) at transplanting. Growers can apply granular or powdered AMF inoculum in the planting hole, dust it directly on the roots, or dip vine roots in an AMF spore slurry immediately before planting. These methods ensure the fungus comes into direct contact with roots and colonization begins promptly. Nursery propagation offers another opportunity: mixing AMF into potting media when raising grapevine cuttings will pre-colonize roots so that vines are mycorrhizal by the time they go into the field. This approach has been shown to boost subsequent field performance of vines by jump-starting the symbiosis. If planting into fumigated or sterilized soil (for instance, replanting an old vineyard site that was treated for nematodes), inoculation at planting is critical  – otherwise the soil has virtually no beneficial fungi and vines will remain non-mycorrhizal for an extended period. Field trials in Oregon have demonstrated that grapevines in fumigated plots had negligible AMF colonization unless they were deliberately inoculated at planting. In contrast, planting into older vineyard soil with an intact native AMF community is more forgiving, as indigenous fungi will often colonize new vines on their own (though supplementing with a robust inoculant can still enhance colonization levels and early growth). In established vineyards:  Introducing AMF after vines are already planted is more challenging, but there are methods to do so. One approach is to apply granular inoculum in furrows or holes near the vine root zone (to get spores closer to roots). Another strategy is injecting liquid mycorrhizal inoculum through drip irrigation systems, which can distribute the propagules to the root vicinity. Additionally, using mycorrhizal cover crops or companion plants in the vine rows can help spread AMF to grape roots over time. Many grasses and legumes commonly used as cover crops are good hosts for AMF; planting these in row middles or undervine can act as a “living reservoir” of mycorrhiza that gradually transfer to the vines. (Note: avoid non-mycorrhizal covers like mustards in areas where you want to promote AMF, as Brassica species do not host AMF and can even suppress them.) While post-planting inoculation is possible, it may take longer to see effects than early-life colonization, and success can be variable. Thus, integrating AMF at the start of a vineyard’s life is ideal for maximum benefit. Compatibility with Other Inputs and Sustainable Practices One advantage of R. intraradices  is that it is generally compatible with typical vineyard inputs and sustainable farming practices. It thrives alongside organic matter additions like compost or mulches, which improve soil structure and provide resources for the fungi. Moderate use of fertilizers is also fine – growers often continue normal nitrogen and potassium fertilization, but can reduce phosphorus inputs when AMF are active, since the fungi make soil P more available (allowing cost savings and avoiding nutrient imbalances). It is recommended to avoid excessive  P fertilization, as high soil P will chemically satisfy the vine and actually suppress mycorrhizal colonization, negating the benefits. Similarly, be cautious with certain agricultural chemicals: soil fumigants or fungicides with broad antifungal activity can harm AMF propagules. If a fungicide treatment is needed, using primarily foliar fungicides or timing soil-directed fungicides when AMF are less active can mitigate negative impacts. Always check product labels for AMF safety if planning a concurrent inoculation. Combining with biostimulants:   AMF inoculation can be part of a broader biofertility program in the vineyard. Researchers have found synergies between AMF and other beneficial microbes. For example, the beneficial rhizobacterium Bacillus subtilis  is often applied in vineyards for biocontrol and growth promotion, and it pairs well with R. intraradices . Co-inoculating grapevines with AMF plus B. subtilis  has shown significantly greater plant growth than using either alone – the AMF boosts nutrient and water uptake while the bacterium produces growth-stimulating compounds and helps suppress soil pathogens, together resulting in healthier, more vigorous vines. Other inoculant fungi like Trichoderma  can also coexist with AMF, targeting different aspects of plant health. The key is that a diverse, microbially rich soil tends to support robust AMF function rather than hinder it. Just take care to avoid highly fungicidal treatments around the same time as applying AMF, as noted above, so you don’t inadvertently kill your beneficial fungi. Best practices to support AMF:  Once you’ve established mycorrhizal fungi in your vineyard, certain practices will help them flourish. Keeping some form of cover crop or vegetation year-round provides continuous host roots for the fungi, preventing starvation during fallow periods. Minimizing deep or frequent tillage is important, as intensive soil disturbance can break the hyphal networks and reduce AMF effectiveness (switching to no-till or shallow cultivation systems is more AMF-friendly). Many growers using AMF also adopt organic or sustainable viticulture methods that naturally align with nurturing soil biology – for instance, using compost, reducing synthetic fertilizers, and employing deficit irrigation, which can even stimulate greater AMF colonization in vines. With proper management, inoculated vines can achieve over 50% of fine roots colonized by AMF within a year or two. Growers should essentially treat the mycorrhiza as an extension of the vine’s own roots: feed it, protect it, and it will reward you  with ongoing improvements in vine health and productivity. In practical terms, leveraging R. intraradices  in vineyards offers a science-backed route to stronger, more resilient grapevines that produce high-quality fruit sustainably – a win-win for both vineyard performance and soil ecosystem health. References: Trouvelot, S., Bonneau, L., Redecker, D., van Tuinen, D., Adrian, M., & Wipf, D.  (2015). Arbuscular mycorrhiza symbiosis in viticulture: a review . Agronomy for Sustainable Development, 35 , 1449‑1467. https://doi.org/10.1007/s13593‑015‑0329‑7   link.springer.com Krishna, H., Singh, S.K., Minakshi, G., Patel, V.B., Khawale, R.N., Deshmukh, P.S., & Jindal, P.C.  (2006). Arbuscular‑Mycorrhizal Fungi Alleviate Transplantation Shock in Micro‑propagated Grapevine (Vitis vinifera L.) . Journal of Horticultural Science & Biotechnology, 81(2) , 259‑263. https://doi.org/10.1080/14620316.2006.11512059   researchgate.net Schreiner, R.P., Tarara, J.M., & Smithyman, R.P.  (2007). Deficit irrigation promotes arbuscular colonization of fine roots by mycorrhizal fungi in grapevines (Vitis vinifera L.) in an arid climate . Mycorrhiza, 17(7) , 551‑562. https://doi.org/10.1007/s00572‑007‑0128‑3   pubmed.ncbi.nlm.nih.gov Schreiner, R.P., & Mihara, K.L.  (2009). The diversity of arbuscular mycorrhizal fungi amplified from grapevine roots (Vitis vinifera L.) in Oregon vineyards is seasonally stable and influenced by soil and vine age . Mycologia, 101(5) , 599‑611. https://doi.org/10.3852/08‑169   pubmed.ncbi.nlm.nih.gov Massa, N., Bona, E., Novello, G., et al.  (2020). AMF communities associated to Vitis vinifera in an Italian vineyard subjected to integrated pest management at two different phenological stages . Scientific Reports, 10 , 9197. https://doi.org/10.1038/s41598‑020‑66067‑w   pubmed.ncbi.nlm.nih.gov Fattahi, M., Nasrollahpourmoghadam, S., & Mohammadkhani, A.  (2021). Comparison of effectiveness of arbuscular mycorrhiza fungi (AMF) on Vitis vinifera under low‑irrigation conditions . Agricultural Science Digest, 41(Special Issue) , 119‑128. https://doi.org/10.18805/ag.D‑253   arccjournals.com Aguilera, P., Ortiz, N., Becerra, N.,  et al.   (2022). Application of Arbuscular Mycorrhizal Fungi in Vineyards: Water and Biotic Stress Under a Climate Change Scenario – New Challenge for Chilean Grapevine Crop . Frontiers in Microbiology, 13 , 826571. https://doi.org/10.3389/fmicb.2022.826571

Bacillus thuringiensis israelensis: mechanisms of action Bacillus thuringiensis israelensis (Bti)  is a Gram-positive, spore-forming bacterium well-known for producing toxins that target the larvae of mosquitoes, black flies, and other related pests. It has gained widespread use as a biological control agent due to its high specificity for insect larvae and its safety for non-target organisms, including humans and wildlife. This makes Bti an ideal candidate for biological pest management in ecologically sensitive environments. Bti produces several insecticidal crystalline proteins (ICPs) , primarily Cry4A, Cry4B, Cry11A , and Cyt1A , which are toxic when ingested by insect larvae. Once inside the insect’s midgut, these toxins are activated by the alkaline environment, where they bind to receptors on the gut epithelial cells. This interaction forms pores in the gut lining, leading to cell lysis and the eventual death of the larvae through septicemia or starvation. Bacillus thuringiensis cell structure Due to this precise mechanism, Bti is highly effective against mosquito and black fly larvae without harming beneficial insects, mammals, or birds . Bacillus thuringiensis subsp. israelensis (Bti)  is highly effective against a specific group of insects, particularly those in their larval stage. Here is a list of the primary insect groups that Bti can target: 1. Mosquitoes (Family: Culicidae ) Aedes spp.  (e.g., Aedes aegypti , Aedes albopictus ), which transmit diseases like dengue fever, Zika virus, and chikungunya. Anopheles spp. , which are vectors for malaria. Culex spp. , which can carry West Nile virus and filarial parasites. 2. Black Flies (Family: Simuliidae ) Simulium spp. , known for their nuisance and ability to transmit diseases such as river blindness (onchocerciasis) in humans and various diseases in animals. 3. Fungus Gnats (Family: Sciaridae ) Bradysia spp. , commonly found in greenhouse environments, causing damage to plant roots. 4. Non-Biting Midges (Family: Chironomidae ) Chironomus spp. , though they do not bite, their large populations can be a nuisance in urban areas. 5. Other Aquatic Diptera Various species of aquatic flies that can be controlled by Bti due to their similar larval biology to mosquitoes and black flies. While Bti  is highly selective in targeting these insect groups, it does not affect non-target organisms like beneficial insects (e.g., pollinators), mammals, birds, or aquatic organisms. This makes it a preferred option for environmentally safe biological control. Key Uses and Applications 1. Biological Control of Mosquitoes Bti is primarily utilized as a biolarvicide  to control mosquito populations, particularly species that transmit harmful diseases such as malaria, dengue fever, and Zika virus. It is applied to mosquito breeding sites, including standing water in marshes, ponds, and sewage systems, where larvae thrive. The ability of Bti to specifically target mosquito larvae while being harmless to other aquatic organisms makes it an environmentally safe choice for controlling vector-borne diseases. 2. Sequential Fermentation with Sewage Sludge One interesting application involves the use of sewage sludge  in Bti production, in conjunction with Bacillus sphaericus . This sequential fermentation process helps convert waste materials into an effective biolarvicide, reducing costs and providing an environmentally sustainable method of producing Bti. Additionally, Bacillus sphaericus  is often combined with Bti to enhance effectiveness against various mosquito species, further minimizing the chance of resistance development. 3. Biological Control of Black Flies Bti is also highly effective in controlling black fly populations , which are notorious for spreading diseases among humans and livestock. The application of Bti to black fly breeding grounds (usually fast-moving rivers and streams) provides an eco-friendly solution to managing this pest. Like mosquitoes, black flies ingest the Bti toxins, leading to their death at the larval stage, reducing adult populations and preventing further disease transmission. 4. Agricultural Pest Control Beyond mosquito and black fly control, Bti has shown promise in agricultural pest management , particularly against pests like beetles that cause crop damage. Due to its specific targeting of pests, Bti serves as an attractive alternative to chemical pesticides, which can harm beneficial insects, pollinators, and the surrounding environment. 5. Bioremediation Potential Though less explored, Bti has potential applications in bioremediation . Its ability to control pests that contribute to water contamination can help in the restoration of polluted aquatic ecosystems. The reduction in pest populations through Bti applications can mitigate the spread of pathogens and pollutants, enhancing the health of water bodies. Advantages of Using Bti 1. Environmental Safety Bti's high specificity for certain insect larvae, coupled with its non-toxicity to humans, animals, and non-target organisms, makes it an ideal biological control agent. Its use minimizes collateral damage to beneficial species, including pollinators and aquatic organisms. 2. Resistance Management While the threat of pest resistance to biological agents exists, combining Bti with other larvicidal agents, such as Bacillus sphaericus , can reduce the risk of resistance development. This approach prolongs the effectiveness of Bti in controlling mosquito populations over time. 3. Cost-Effective Production Utilizing sewage sludge and other waste products in the fermentation of Bti presents a cost-effective and sustainable production method. This approach reduces production costs while simultaneously managing waste, creating a dual benefit for environmental management . 4. Potential for Synergistic Use Research shows that combining Bti with certain chemical agents, such as sulfamethoxazole , can enhance its larvicidal efficacy. Such combinations could prove beneficial in areas where mosquito populations have developed resistance to traditional biopesticides. Conclusion Bacillus thuringiensis subsp. israelensis (Bti)  is a powerful biological control agent used primarily for the management of mosquito and black fly populations . Its specificity for insect larvae, combined with its safety for non-target organisms, makes it a valuable tool in sustainable pest management. Additionally, its potential in agricultural pest control, bioremediation, and eco-friendly production methods highlights Bti's versatility. As research continues, Bti may find even broader applications in integrated pest management (IPM) strategies, contributing to long-term ecological sustainability. If you would like to purchase Bacillus thuringiensis israelensis you can do it here . References: Schnepf, E., et al. (1998). Bacillus thuringiensis and its pesticidal proteins . Microbiol. Mol. Biol. Rev. , 62(3), 775-806. Charles, J. F., Nielsen-LeRoux, C., & Delecluse, A. (1996). Bacillus sphaericus toxins: Molecular biology and mode of action . Annu. Rev. Entomol. , 41, 451-472. Pree, D. J., & Daly, J. C. (1996). Toxicity of Mixtures of Bacillus thuringiensis with Endosulfan and Other Insecticides to the Cotton Boll Worm Helicoverpa armigera . Pestic. Sci. , 48, 199-204. Tanapongpipat, S., et al. (2003). Stable integration and expression of mosquito-larvicidal genes from Bacillus thuringiensis subsp. israelensis and Bacillus sphaericus into the chromosome of Enterobacter amnigenus: A potential breakthrough in mosquito biocontrol . FEMS Microbiol. Lett. , 221(2), 243-248. Ohio State University Blog

Introduction The rapid increase in global population and industrial activities has led to a significant rise in organic waste generation, creating considerable environmental and public health challenges. Improperly managed organic waste serves as a major source of pollutants, including methane (CH₄) and other greenhouse gases (GHGs), which substantially contribute to climate change. Additionally, the leaching of contaminants into soil and water systems disrupt ecosystems and pose risks to human health. Conventional waste management strategies, such as landfilling and incineration, are increasingly recognized as unsustainable due to their environmental impact, including air and water pollution and inefficient resource utilization. In contrast, emerging biotechnological approaches provide sustainable solutions for waste valorization. Utilizing microbial metabolism, processes like anaerobic digestion (AD) and dark fermentation convert organic waste into bioenergy (e.g., biogas and biohydrogen) while simultaneously reducing waste volume. These bioprocesses not only optimize waste degradation but also contribute to circular economy principles by converting waste into valuable by-products, such as biofertilizers and precursors for bioplastics. This review examines recent advancements in biotechnological methods for transforming organic waste into renewable energy, highlighting their potential to address the dual challenges of waste management and sustainable energy production. Anaerobic Digestion: A Key Technology in Waste Management Anaerobic digestion is a biological process that converts organic waste into biogas, a mixture primarily composed of methane (CH₄) and carbon dioxide (CO₂)​. The process involves four main stages: Hydrolysis : Complex organic matter is broken down into simpler soluble molecules like sugars and amino acids. Acidogenesis : These simpler molecules are converted into volatile fatty acids (VFAs). Acetogenesis : VFAs are further processed into acetic acid, hydrogen, and CO₂. Methanogenesis : Finally, methanogenic archaea convert these products into methane and CO₂​. The efficiency of anaerobic digestion can be enhanced by co-digestion, where multiple types of waste are processed together. For instance, co-digesting tannery wastewater with dairy waste has been shown to improve biogas yield and methane content due to the complementary nutrient profiles of these waste streams​. Benefits of Anaerobic Digestion Energy Production : Biogas can be used to generate electricity, heat, or even upgraded to biomethane for use as a vehicle fuel​. Waste Reduction : The process significantly reduces the volume of waste, which is critical for industries with high organic waste outputs such as agriculture, food processing, and wastewater treatment​. Nutrient Recovery : The digestate, a by-product of AD, can be used as a biofertilizer, rich in nitrogen, phosphorus, and potassium, thus closing the nutrient loop. Biohydrogen Production: Novel Sustainable Waste Management process. Hydrogen, a clean fuel with zero carbon emissions, is gaining attention as a sustainable alternative to fossil fuels. Among various methods of hydrogen production, biohydrogen generated through anaerobic fermentation is particularly promising due to its low environmental impact​.  This process, known as dark fermentation, involves the microbial breakdown of carbohydrate-rich substrates in the absence of light, producing hydrogen and organic acids. Enhanced Biohydrogen Production : Research indicates that adding residual glycerol from biodiesel production to cassava wastewater can significantly boost hydrogen yield during anaerobic digestion​. The optimal conditions for maximizing hydrogen production include a balanced substrate-to-biomass ratio, temperature control, and proper inoculation with hydrogen-producing bacteria. Key Microbes : Hydrogen production is driven by specific anaerobic bacteria, including species from the genera Clostridium , Bacillus , and Enterobacter ​. Operational Parameters : Studies have shown that maintaining a pH of around 5.5 to 6.0 and a temperature of 35-38°C optimizes biohydrogen yields​. Microbial Plastic Degradation: Addressing the Plastic Pollution Crisis The accumulation of plastics in the environment is a major challenge due to their resistance to degradation. Traditional recycling methods are limited, especially for non-PET plastics like polyethylene and polystyrene​. Recent biotechnological advances focus on using microbial enzymes, such as PETase and laccases, to break down plastics into biodegradable components. Biotechnological Strategies : Enzymatic Degradation : Specific enzymes target polymer bonds, converting plastics into monomers that can be further utilized by microbes​. CRISPR and Synthetic Biology : Genetic engineering techniques, including CRISPR, are being explored to enhance the efficiency of microbial strains in breaking down plastics and converting them into valuable biochemicals​. Plastic degradation under aerobic conditions The Role of Biogas and Biohydrogen in the Circular Economy Integrating biotechnological solutions into waste management systems aligns with the principles of the circular economy. By converting waste into bioenergy, industries can reduce their carbon footprint, lower waste management costs, and contribute to energy sustainability​. Key Applications : Decentralized Waste Management : Small-scale anaerobic digesters can be implemented in communities to process organic waste, generating biogas for local energy needs while reducing landfill dependence​. Industrial Waste Valorization : Food processing industries, breweries, and dairy farms can adopt biohydrogen and biogas production to manage their organic waste streams effectively. Various methods of obtaining biogas and biohydrogen via fermentatio Conclusion The transition to sustainable waste management requires innovative approaches that integrate biotechnological advancements. Technologies like anaerobic digestion and biohydrogen production not only offer solutions to waste management but also pave the way for sustainable energy production. By embracing these technologies, industries can play a pivotal role in achieving environmental sustainability and reducing reliance on fossil fuels​. Moving forward, continued research and investment in optimizing microbial processes and scaling up these technologies will be crucial to realizing their full potential. The integration of biotechnology into waste management systems is not just an opportunity but a necessity for a sustainable future. At IndoGulf BioAg we are dedicated to contributing to global efforts to aid in and develop new sustainable strategies for agriculture , environmental remediation , water treatment , and medical industry by using microorganisms, fungi, enzymes and nano-technology Reach out to us with your needs and our team will ensure to deliver optimal solutions tailored personally for you. References: González Henao, S., & Ghneim-Herrera, T. (2021). Metals in soils: Remediation strategies based on bacteria and fungi. Environmental Science and Pollution Research . Retrieved from consensus.app Zhang, L., Rengel, Z., Meney, K., & Tu, C. (2018). Mycorrhizal fungi in improving grain yields: A meta-analysis of field studies. Agronomy Journal . Tufail, M., Shahzad, R., & Sohail, M. (2022). Endophytic bacteria perform better than fungi in improving plant growth under drought stress. Journal of Plant Interactions . Zhao, Y., Ji, X. L., Shen, T., Tang, W. T., & Li, S. S. (2020). The role of endophytic Seimatosporium sp. in enhancing host plant powdery mildew resistance. Plant Soil . Tran, H. Q., Le, T. N., & Dao, T. V. (2021). Aerobic composting for the bioremediation of petroleum-contaminated soil. Journal of Hazardous Materials . Indogulf BioAg Microbial Strains for Agriculture 2022. Indogulf BioAg. (2022). IGBA Environmental Species

Hemp harvesting on the banks of Rhine river, 1860s Cannabis ( Cannabis sativa ) has a documented history of cultivation that extends over thousands of years, with evidence dating back to at least the Neolithic era. Initially domesticated in Eastern Asia, cannabis became a significant part of human culture due to its adaptability and multitude of uses, including fiber production, medicinal applications, and food sources.  The spread of cannabis across continents was influenced by human migrations and trade, integrating deeply with agricultural practices across Europe, Asia, and Africa. Throughout its long history, cannabis has co-evolved with the natural environment, forming mutually beneficial relationships with organisms such as mycorrhizal fungi and Plant Growth-Promoting Rhizobacteria (PGPR).  Hemp plant illustration from a botanical atlas, 19th century Europe Co-Evolution with Mycorrhizal Fungi   One of the most remarkable aspects of cannabis’s evolutionary history is its symbiosis with mycorrhizal fungi. These fungi are symbiotic with most terrestrial plants, forming associations that extend root networks and enhance the plant's ability to access water and essential nutrients in exchange for carbohydrates produced by plants.   Rhizophagus irregularis ( Glomus intraradices) a species of arbuscular mycorrhizal fungi (AMF), is known to form extensive hyphal networks that connect with cannabis roots, facilitating increased absorption of phosphorus and other minerals that are often limited in soil. Pseudomonas spp. in the rhizosphere and its' influence for cannabis plant growth The process by which AMF enhances nutrient uptake involves the fungi penetrating the root cells and forming arbuscules—structures that facilitate the exchange of nutrients between the plant and the fungus. The plant supplies the fungi with carbon derived from photosynthesis, while the fungi provide the plant with improved access to phosphorus, nitrogen, and micronutrients. This relationship is particularly valuable in cannabis cultivation, where phosphorus is essential for robust growth and flowering. Studies have shown that cannabis plants with AMF associations exhibit better root mass, increased growth rates, and enhanced resilience to environmental stressors​. The Role of Trichoderma and Beneficial Bacteria   Trichoderma harzianum in cannabis rhizosphere In addition to mycorrhizal fungi, Trichoderma harzianum  plays an integral role in promoting cannabis health. This beneficial fungus colonises the rhizosphere, producing growth hormones such as indole-3-acetic acid (IAA), which stimulate root branching and elongation. The result is a more extensive root system capable of greater nutrient and water absorption. Furthermore, Trichoderma  acts as a natural biocontrol agent by releasing lytic enzymes and secondary metabolites that deter soil-borne pathogens, thereby reducing disease incidence and promoting overall plant vitality. Benefits of a healthy and diverse rhizosphere Beneficial bacteria, particularly strains of Bacillus  and Lactobacillus , add another layer of support to cannabis cultivation: Nutrient Solubilization :  Bacillus subtilis  and related strains enhance the availability of phosphorus and potassium in the soil, making these nutrients more accessible to the plant. This solubilization process is essential for cannabis, which requires ample nutrients for vigorous growth and development. Pathogen Suppression :  Bacillus  spp. produce bioactive lipopeptides and enzymes that protect the plant from fungal pathogens, reinforcing the plant’s ability to withstand biotic stress. Soil Fertility Enhancement :   Lactobacillus  spp., such as L. casei  and L. plantarum , contribute to the breakdown of organic matter and nutrient cycling, enriching soil fertility and ensuring that cannabis plants have a consistent supply of essential nutrients throughout their growth cycle​. Historical and Ecological Significance   Cannabis’s extensive use throughout history also intersected with traditional agricultural practices that leveraged the plant’s resilience and diverse applications. For example, hemp retting, a process used to extract fibers from cannabis stems by submerging them in water, has been practiced for centuries. Historical sediment analyses in places like the French Massif Central have revealed the presence of cannabinol (CBN), a phytocannabinoid metabolite, in ancient sediments. This finding underscores the deep connection between human activity and cannabis cultivation over centuries​. Retting, although beneficial for producing high-quality fibers, has historically posed environmental challenges by affecting water quality. This highlights the importance of modern, sustainable practices that maintain productivity while protecting natural resources. The use of microbial inoculants such as AMF , Trichoderma , and beneficial bacteria supports sustainable agricultural systems by enhancing soil health, reducing dependency on chemical fertilisers, and improving carbon capture. Modern Applications: The Role of Microbial Products   The co-evolution of cannabis with beneficial microbes provides a strong foundation for modern microbial technologies aimed at sustainable cultivation. Our Super Microbes brand, with products like RootX and BoostX incorporates these naturally occurring relationships backed by science and research : RootX :  Integrates Glomus intraradices , Trichoderma harzianum , and 13 species of Bacillus  to extend root systems, optimize nutrient absorption, and offer natural protection against pathogens. This synergy helps cannabis plants achieve vigorous growth and enhanced yield. BoostX :  Focuses on enriching the microbial environment with multiple strains of Bacillus , Lactobacillus , Rhodopseudomonas palustris , and Saccharomyces cerevisiae . These components increase nutrient bioavailability, promote robust flowering and bud formation, and contribute to sustained soil health. Environmental Benefits and Carbon Sequestration   The integration of mycorrhizal fungi and beneficial bacteria into cannabis cultivation also plays a significant role in climate resilience. Mycorrhizal networks contribute to soil carbon storage by stabilizing organic matter and forming stable carbon pools as their structures decompose. The allocation of 5-20% of carbon captured by plants to support mycorrhizal fungi showcases their vital role in the carbon cycle. Estimates indicate that mycorrhizal fungi contribute to sequestering approximately 13 Gt of CO2e annually, a significant portion of the global carbon output​.. Conclusion   The symbiosis between cannabis and organisms like mycorrhizal fungi and beneficial bacteria is just a small example of nature's complexity and adaptability. Understanding and harnessing these relationships not only improve plant health and yield but also foster sustainable agricultural practices that contribute to soil health and carbon capture. The continued study and application of these beneficial interactions can support ecological restoration efforts and bolster climate-positive outcomes, paving the way for a more resilient and sustainable agricultural future. References: McPartland, J. M., & Guy, G. W. (2004). The evolution of cannabis and co-evolution with the human species. Clarke, R. C., & Merlin, M. D. (2013). Cannabis: Evolution and Ethnobotany . University of California Press. Lavrieux, M., et al. (2013). Sedimentary cannabinol tracks the history of hemp retting in Lake Aydat, France. Geology , 41(7), 1-4. Mercuri, A. M., et al. (2002). The identification and analysis of Cannabis pollen in archaeological and natural environments. Journal of Archaeological Science . Rull, V., et al. (2022). Historical biogeography of Cannabis  in the Iberian Peninsula: Palynological evidence. Vegetation History and Archaeobotany . Duvall, C. S. (2014). The African Roots of Marijuana . Duke University Press. Small, E. (2015). Cannabis: A Complete Guide . CRC Press. Effect of Colonization of Trichoderma harzianum on Growth Development and CBD Content of Hemp (Cannabis sativa L.) Article in Microorganisms · March 2021 DOI: 10.3390/microorganisms9030518   Trichoderma and its role in biological control of plant fungal and nematode disease  Xin Yao 1†, Hailin Guo 2†, Kaixuan Zhang 3†, Mengyu Zhao 1, Jingjun Ruan 1* and Jie Chen 4*  1 College of Agronomy, Guizhou University, Guiyang, China, 2 Science and Technology Innovation Development Center of Bijie City, Bijie, China, 3 Institute of Crop Science, Chinese Academy of Agriculture Science, Beijing, China, 4 School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China

Mycorrhizal fungi, symbiotic partners of most terrestrial plants, play a crucial role in global carbon cycling. By forming intricate relationships with plant roots, these fungi facilitate the transfer and storage of carbon in soil ecosystems. This text explores the mechanisms by which mycorrhizal fungi contribute to carbon sequestration, their ecological importance, and the potential implications for climate change mitigation. Carbon Fixation in Plants Carbon fixation is a critical process in photosynthesis, where plants convert atmospheric carbon dioxide (CO2) into organic compounds. This process is fundamental to the growth of plants and the sustenance of life on Earth. It primarily occurs in the chloroplasts of plant cells, utilizing light energy to drive the conversion of CO2 and water into glucose and oxygen. The most well-known pathway for carbon fixation is the Calvin Cycle, which takes place in the stroma of chloroplasts. The cycle begins when CO2 is attached to a five-carbon sugar, ribulose-1,5-bisphosphate (RuBP), by the enzyme RuBisCO. This reaction produces a six-carbon compound that immediately splits into two molecules of 3-phosphoglycerate (3-PGA). These molecules undergo a series of reactions using energy from ATP and NADPH, generated in the light-dependent reactions of photosynthesis, to form glyceraldehyde-3-phosphate (G3P). G3P is then used to synthesize glucose and other carbohydrates, which serve as energy sources and structural components for the plant. Carbon fixation is not only vital for plant growth but also for the global carbon cycle. Through photosynthesis, plants act as carbon sinks, sequestering atmospheric CO2 and mitigating the effects of climate change. Additionally, the organic compounds produced via carbon fixation form the base of the food chain, supporting a wide range of organisms, from herbivores to apex predators. In summary, carbon fixation in plants is an essential biochemical process that sustains life on Earth by converting CO2 into usable organic matter, thereby supporting plant growth and contributing to the global carbon balance. Plants allocate enough carbon to underground mycorrhizal fungi equivalent to roughly one-third of carbon emitted yearly by fossil fuels Peer-Reviewed Publication CELL PRESS ”  Carbon Flow to Mycorrhizal Mycelia Mycorrhizal fungi receive a significant portion of carbon fixed by plants through photosynthesis. Estimates suggest that plants allocate between 5-20% of their total carbon uptake to these fungi. This carbon is used to build and maintain extensive mycelial networks, which can transport and store carbon in the soil​​. Mechanisms of Carbon Storage Mycorrhizal fungi contribute to soil carbon storage through several mechanisms. First, they enhance the formation of soil aggregates by exuding compounds such as glomalin, which binds soil particles together, thereby stabilizing soil organic matter. Additionally, the mycelial networks themselves become part of the soil organic matter when they die and decompose, forming a stable carbon pool known as fungal necromass​​. VIDEO: FLOWS OF FLUORESCENTLY LABELED CARBON INSIDE MYCORRHIZAL FUNGI CREDIT: CARGILL & OYARTE-GALVEZ (AMOLF) Ecological Importance Enhancing Soil Health Mycorrhizal fungi improve soil structure and fertility, which in turn enhances plant growth and resilience. The hyphal networks increase the surface area for nutrient exchange, allowing plants to access nutrients that are otherwise unavailable. This is particularly important in nutrient-poor soils, where mycorrhizal fungi can significantly boost plant productivity and health​​. Biodiversity and Ecosystem Stability Mycorrhizal associations support plant diversity and ecosystem stability. By facilitating nutrient uptake, these fungi help a wide variety of plant species to thrive, thereby maintaining biodiversity. Furthermore, the carbon storage function of mycorrhizal fungi contributes to the overall stability and resilience of ecosystems, making them less susceptible to disturbances such as climate change​​. Applications in Climate Change Mitigation Carbon Sequestration Potential The global contribution of mycorrhizal fungi to carbon sequestration is substantial. Studies estimate that these fungi are responsible for sequestering approximately  13 Gt of CO2e per year, which is equivalent to about 36% of annual CO2 emissions from fossil fuels. This highlights the potential of mycorrhizal fungi in mitigating climate change through enhanced carbon sequestration​​. Sustainable Agriculture In agriculture, the use of mycorrhizal fungi can reduce the need for chemical fertilizers and pesticides, promoting more sustainable farming practices. By improving nutrient uptake and soil health, mycorrhizal fungi help to increase crop yields and quality, particularly in low-fertility soils. This can lead to a reduction in the environmental impact of agriculture and support global food security​​. Conclusion Mycorrhizal fungi are vital components of terrestrial ecosystems, playing a key role in carbon sequestration and soil health. Their symbiotic relationships with plants have profound implications for global carbon cycling and climate change mitigation. By enhancing our understanding and application of these fungi, we can unlock their full potential to support sustainable agriculture and environmental restoration, contributing to a more sustainable future. References:  Will fungi solve the carbon dilemma? ( S. Emilia Hannula a,c , Elly Morri¨en a,b,* a Department of Terrestrial Ecology, Netherlands Institute of Ecology, PO Box 50, 6700 AB Wageningen, the Netherlands b Department of Ecosystem and Landscape Dynamics, Institute of Biodiversity and Ecosystem Dynamics (IBED-ELD), University of Amsterdam, P.O. Box 94240, 1090 GE Amsterdam, the Netherlands c Department of Environmental Biology, Institute of Environment       Carbon allocation in mycelia of arbuscular mycorrhizal fungi during colonisation of plant seedlings Aiko Nakano-Hylander, Pa ̊ l Axel Olsson ( Department of Ecology, Lund University, Ecology Building, SE-223 62 Lund, Sweden )

At IndoGulf BioAg, we specialize in research and production of hundreds various bacterial species for wide range of applications. Pseudomonas strains possess immense potential to aid modern agriculture in reducing chemical inputs into the soil and restoring a healthy soil microbiome. Renowned for their versatility, several Pseudomonas strains offer significant advantages in promoting plant growth, combating pathogens, and enhancing soil health. Auxin Production by Pseudomonas strains Auxin, particularly indole-3-acetic acid (IAA), is crucial for regulating plant growth. Many Pseudomonas strains, such as Pseudomonas fluorescens , can produce IAA, stimulating root hair formation and lateral root development, which results in robust root systems​. The level of IAA produced can either stimulate or inhibit root growth, influenced by the balance between plant and bacterial synthesis. Strategic selection of strains ensures the optimisation of IAA production, enhancing root development without adverse effects​. Cytokinins and Gibberellins: Supporting Shoot Growth and Stress Tolerance Pseudomonas species also produce other phytohormones like cytokinins and gibberellins, which are vital for shoot growth and stress resilience​. Cytokinins aid in cell division, chlorophyll synthesis, and delaying leaf senescence, particularly under water stress​. Gibberellins, such as those produced by Pseudomonas putida , enhance stem elongation and seed germination​. ( article on P.Putida here ) applications of P.Putida These properties facilitate faster plant growth and improved drought resistance, promoting resilience in harsh environments​. ACC Deaminase: Alleviating Plant Stress Under stress, plants produce ethylene, which can restrict growth. Pseudomonas strains with ACC deaminase activity break down the ethylene precursor 1-aminocyclopropane-1-carboxylate (ACC), reducing ethylene levels and mitigating its growth-inhibitory effects​. Studies demonstrate that plants inoculated with such strains show enhanced biomass and stress tolerance​. Phosphate Solubilization Phosphorus, often present in insoluble forms in soil, is essential for plant nutrition. Pseudomonas strains that solubilize phosphate through the release of organic acids like gluconate and citrate improve phosphorus availability​. This enhancement in nutrient uptake supp orts stronger plant growth and yields, even in nutrient-poor soils​. Biocontrol: Natural Defense Against Pathogens One remarkable attribute of Pseudomonas species is their ability to act as biocontrol agents. Strains like Pseudomonas fluorescens  produce antifungal compounds such as 2,4-diacetylphloroglucinol (DAPG), which suppress pathogens like Rhizoctonia solani and Fusarium spp.​ This natural suppression reduces reliance on chemical pesticides, contributing to more sustainable agricultural practices. Pseudomonas species are versatile bacteria with impactful roles in enzyme production, bioremediation, and sustainable agriculture. Acting as plant growth promoters and biocontrol agents, they offer eco-friendly alternatives to chemical inputs while supporting environmental management through soil remediation. Explore how Pseudomonas species can benefit your projects. Contact us today  to harness their potential in biotechnology and sustainable solutions. References Ahmad et al., 2022 – Effects of PGPR on drought stress mitigation​(Plant_Growth_Promoting_…). Singh et al., 2023 – Mechanisms of PGPR in sustainable agriculture​(Enhancing_plant_growth_…). Bano et al., 2022 – Phytostimulants for growth and stress tolerance​(Phytostimulants_in_sust…). Dukare et al., 2022 – Microbial contributions to plant health​(Delineation_of_mechanis…). Saeed et al., 2021 – Comprehensive review of rhizobacteria functions​(Rhizosphere_Bacteria_in…). Yang et al., – Rhizobacteria in abiotic stress resilience​(Rhizosphere_bacteria_he…). Auxins-Interkingdom Signaling Molecules Written By Aqsa Tariq and Ambreen Ahmed

As agricultural practices evolve, farmers and gardeners are increasingly turning to sustainable solutions to boost crop yields and improve soil health. Among these solutions is the use of beneficial microbes like Bacillus coagulans , a spore-forming bacterium with remarkable potential for enhancing plant growth. This article explores the various uses, benefits, and important considerations when incorporating Bacillus coagulans  into plant cultivation. What is Bacillus Coagulans? Bacillus coagulans  is a lactic acid bacterium, well known for its probiotic benefits in humans and animals. However, its utility extends beyond probiotics, as recent research has highlighted its role in agriculture, particularly for improving plant health and soil quality. This resilient, spore-forming bacterium can survive extreme conditions and remains dormant until conditions are favorable for growth. Key Uses of Bacillus Coagulans in Agriculture Soil Health Enhancement : Bacillus coagulans  aids in improving soil structure by breaking down organic matter, releasing nutrients that plants can absorb. This activity also helps balance soil pH and enhances water retention, which is critical for maintaining soil fertility. Promoting Plant Growth : By producing phytohormones like indole-3-acetic acid (IAA), Bacillus coagulans  promotes root development, leading to stronger root systems and healthier plant growth. Enhanced root systems enable plants to access more water and nutrients. Disease Suppression : This bacterium helps suppress harmful soil pathogens by outcompeting them for resources. By reducing the population of disease-causing microbes, Bacillus coagulans  lowers the risk of plant diseases. Bioremediation : Bacillus coagulans  plays a role in breaking down harmful substances such as pesticides and heavy metals in the soil. This bioremediation process makes contaminated soils safer for plant growth and reduces environmental pollution. Enhanced Phosphorus Uptake : As shown in studies, Bacillus coagulans  can mobilize poorly soluble phosphates in the soil, making phosphorus more available to plants​. Phosphorus is essential for photosynthesis and energy transfer, making its availability crucial for optimal plant health. Benefits of Bacillus Coagulans for Plants Increased Crop Yields : By enhancing nutrient uptake and promoting healthy root growth, Bacillus coagulans  can significantly increase crop yields. Studies have shown that treated plants often exhibit improved biomass, higher seed yield, and overall better productivity​. Improved Stress Tolerance : Plants treated with Bacillus coagulans  demonstrate increased resistance to environmental stressors, including drought, salinity, and extreme temperatures. This bacterium helps plants maintain their metabolic functions even under adverse conditions. Reduced Need for Chemical Inputs : Using Bacillus coagulans  can reduce reliance on chemical fertilizers and pesticides, leading to more cost-effective and eco-friendly farming practices. Sustainability in Agriculture : By improving soil health and reducing the use of synthetic chemicals, Bacillus coagulans  contributes to sustainable farming practices, which are essential for long-term agricultural success and environmental preservation. Conclusion Bacillus coagulans  represents a promising advancement in sustainable agriculture, offering numerous benefits for plant growth, soil health, and crop yields. When incorporated thoughtfully, Bacillus coagulans  can help farmers and gardeners achieve healthier crops, contribute to sustainable farming practices, and ensure the long-term health of the soil. By adopting Bacillus coagulans  as part of your agricultural strategy, you are taking a step toward more sustainable and productive farming, promoting better crop health, and contributing to environmental conservation for future generations. Reference: Efficiency of Bacillus coagulans as P biofertilizer to mobilize native soil organic and poorly soluble phosphates and increase crop yield Brijesh Kumar Yadav a & Jagdish Chandra Tarafdar a a Department of Soil Science, Maharana Pratap University of Agriculture and Technology, Udaipur, India http://dx.doi.org/10.1080/03650340.2011.575064 .