Denitrification i.e. conversion of fixed nitrates back into the atmospheric nitrogen is carried out by denitrifying bacteria e.g., Pseudomonas While Nitrosomonas and Nitrococcus convert ammonia into nitrites and Nitrobacter converts nitrites to nitrates
The naturally occurring inorganic nutrient found in the soil and food that is necessary for the proper functioning of animal and plant bodies is defined as nutrition. Minerals are vital elements essential for the body.