Question

nitrogen cycle in points

Answer 1

The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycleinclude fixation, ammonification, nitrification, and denitrification

Answer 2

It is the circulation of nitrogen in the biosphere involving conversion of elemental nitrogen of air into simple molecules (in soil and water)that enter living beings forming complex molecule which break down ultimately to release nitrogen back into atmosphere.
Requirements: nitrogen is essential nutrient which form amino acid ,protein ,enzymes, nucleotide, nucleic acid ,alkaloids etc...