Nitrogen Metabolism, Sources of nitrogen to plants, Biological nitrogen fixation
Nitrogen Metabolism:- > Nitrogen is essential for life form owing to its presence in nucleic acids and proteins. Plants absorb nitrogen through microbial transformations. > Stages:- i. Nitrogen fixation:- - In this step the atmospheric nitrogen is primarily available in the inert form which is then converted to ammonia which can be used. - During this process the inert form of nitrogen gas is deposited into solid from the atmosphere and surface waters with the help of precipitation. - The nitrogen then undergoes a number of processes to combine with the hydrogen to form ammonia. - This whole process of nitrogen fixation is done by symbiotic bacteria. - The fixation can occur through atmospheric fixation. ii. Nitrogen assimilation:- The primary producers tend to consume the nitrogen compounds with the help of roots and they are present in forms such as ammonia, nitrite ammonium ions or nitrate ions. They are used in the formati...