What role does bacteria play in the nitrogen cycle (fixation and denitrification)?
bacteria may help in nitrogen fixation by symbiotic associations for e.g., Rhizobium in pulses it also leads to ammonification of proteins, urea etc. from nitrogenous waste of dead remains or excretory wastes. bacteria then act on ammonia and convert it into nitrites and then nitrates in soil. This nitrate is either absorbed by the plants from soil through roots or gets denitrified to form free nitrogen in air by the axctivity of denitrifying bacteria.
