Question

what is nitrogen cycle

Answer 1

The cycle or the formation of nitrogen back from the nitrogen compounds is known as nitrogen cycle....
For reference go to Class 9 .... Science Chapter -----Natural Resources ....
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Answer 2

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.  The nitrogen cycle involves three major steps: nitrogen fixation, nitrification, and denitrification. It is a cycle within the biosphere which involves the atmosphere, hydrosphere, and lithosphere. Nitrogen is found in several locations, or reservoirs.  Hope it helps Mark me as brainliest Thanks..