Question

State the different ways by which atmospheric nitrogen can be fixed into oxides of nitrogen.Explain briefly.

Answer 1

Nitrogen cycle in biosphere involves the important steps named, Nitrogen fixation, Ammonification, Nitrification and Denitrification.
Nitrogen fixation: The atomospheric nitrogen converts into nitrites by microbes like Rhizobium, blue green algae and azatobactor.
Ammonication: Decomposition of dead organic matter into ammonia by fungi and decay bacteria.
Nitrification : Ammonia becomes nitrites and then to nitrates by nitrosomonas and nitrobactor.
Denitrification: Nitrites in the soil release atmospheric nitrogen by pseudomonas.