Question

what is called nitrogen cycle​

Answer 1

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.

Answer 2

the fixation of Nitrogen from atmosphere in soil and then absorption of of the nitrogen fixed by plants and also run off of absorbed nitrogen through water current it in water bodies and then and release of the absorb nitrogen by denitrifying bacterias complete the cycle nitrogen fixation is done by nitrifying bacteria which fix the nitrogen in the form of nitrate and nitrite