Q. How much nitrogen does azospirillum fix?

Answer

A species of nitrogen-fixing rhizosphere bacteria known as Azospirilla is found to be Gram-negative and to exist in a strictly free-living environment. 10 to 40 kg per hectare of nitrogen can be fixed by azospirillum. According to this theory, inoculation stimulates plant development through a number of different methods, depending on the specifics of the situation. The Multiple Mechanisms Hypothesis is based on research into a wide range of potential mechanisms, including but not limited to: plant regulators, phytohormones, nitrogen fixation, phosphate solubilization, a wide range of small-sized molecules and enzymes, increased membrane activity, competition against pathogens,  mitigation of environmental stressors, increased water and mineral uptake, and increased root proliferation.