Question

How is nitrogen replenished in atmosphere?

Answer 1

It is done through denitrification in this process d bacteria converts nitrates n nitrites into atmospheric nitrogen again

Answer 2

Nitrogen is replenished in the atmosphere by the process of Dentrification. Decomposers Or dentrifying bacteria such as pseudomonas, reduce nitrogen back to nitrogen or ammonia Or some other oxides. Free nitrogen return to atmospheric pool, and oxides are taken up by the plants.