Question

describe briefly any two processes the cycling of Nitrogen in nature

Answer 1

I know only one process
Denitrification :- Some ammonium compounds, nitrites and nitrartes are converted by certain bacteria and fungi into molecular Nitrogen which scapes into the atmosphere. Th process is called DENITRIFICATION.

Answer 2

explain nitrogen cycle. Nitrogen gas makes up around 78% of our atmosphere. It forms a part of many molecules like proteins, nucleic acid and some vitamins. ... Bacteria in the soil convert the nitrogen to ammonium and nitrate, which is taken up by the plants by a process of nitrogenfixation.