Question

how is nitrogen returned back from the atmosphere during the water cycle?

Answer 1

The nitrogen cycle involves the uptake of nitrogen form the atmosphere by a process called fixation which is carried out by microbes or industrial processes. Decomposition of biological waste by microbes can return nitrogen to the atmosphere.

Answer 2

Nitrogen will return back to the soil after the death of these organisms through the activities of soil microorganisms which provide thenitrogen in its ready form again to plants and then to animals and humans. Certain amounts of this fixednitrogen are liable to be lost to theatmosphere in elemental form.