Azotobacter chroococcum are aerobic free-living soil microbes that play an important role in nitrogen-fixing i.e., binding atmospheric nitrogen to plants and releasing it in the form of ammonia ions into the soil.
They normally fix molecular nitrogen from the atmosphere without symbiotic relations with plants.
During this process, various organic acids and enzymes are released that convert atmospheric nitrogen and even amide form of nitrogen available from chemical fertilizer into the form of nitrate that is readily consumable by the plant. Thus, it boosts plant growth and yield.
