Outline salient features of Nitrogen cycle in an ecosystem.

Explanation

(i) Nitrogen is essential constituent or protoplasm which is component of amino acids, protiens, enzymes , nucleic acid etc.
(ii) Reservoir of `N_2` is atmosphere
(iii) `N_2` cycle involves.
(a) Nitrogen fixation., (b) Ammonification (c ) Nitrification (d) Denitrification
(a) Nitrogen Fixation. It may be physical, biological or atmospheric or industrial `N_2` fixation Biological fixation of `N_2` is done by Rhizobium bacteria, cyanobacteria e,g Anabaena.
(b) Ammonification. It involves decomposition of proteins by the ammonifying bacteria of dead animals into ammonia.