name the organism invoved in symbiotic nitrogen fixation.what ared the components needed For this purpose.explain their roles.
In nitrogen cycle, the micro organism play a very important role. They biologically x the atmospheric nitrogen into ammonium,so that it can be easily absorbed by plants.This process is known as ammonication & carried out by bacteria - Rhizobium, Azotobacter etc. The Ammonia formed under go the process of Nitrication, carried out by micro organism Nitrosomonas & Nitrobacter. The Nitrates formed by microbes are absorbed by plants, which are further consumed by animals. When these plants & animals die, the bacteria reduces nitrates back to nitrogen in the soil. It is known as de nitrication and carried out by Pseudomonas. Thus at every step in nitrogen cycle, microbes are involved.
