The primary bacteria that fix nitrogen in plant root nodules are rhizobia , a group including Rhizobium , Bradyrhizobium , Sinorhizobium , Mesorhizobium , and others that form symbiotic partnerships mainly with legumes. These soil microbes invade root cells, create specialized nodules, and use nitrogenase to convert atmospheric N₂ into plant-usable ammonia—supplying 50-300 kg N/ha annually without fertilizers.indogulfbioag+3 For a quick answer on the most common one, see our FAQ:   Which...

Nitrogen fixation by bacteria is a remarkable biological process that transforms inert atmospheric nitrogen gas (N₂) into bioavailable ammonia (NH₃), fueling plant growth and the global food chain. Discovered over a century ago, this process—performed exclusively by certain prokaryotes—provides an estimated 40% of the world's crop nitrogen needs without synthetic inputs. Without bacterial fixation, modern agriculture would collapse under fertilizer dependency. This natural "factory" not only...

Overview Nitrogen-fixing bacteria are specialized microorganisms that can convert inert atmospheric nitrogen gas (N₂) into ammonia (NH₃) or ammonium (NH₄⁺), forms that plants can actually use for growth. This process, called biological nitrogen fixation, is carried out by the nitrogenase enzyme complex and is fundamental to the global nitrogen cycle and sustainable agriculture.[1][2][3] Why Plants Need Nitrogen Fixers Although nitrogen makes up about 78% of the air, most plants cannot use it...