Describe the nitrogen cycle.?

Question

Describe the nitrogen cycle.?

Answer 1

“The circulation of free nitrogen from the atmosphere to protein through plants and animals and finally back to atmospheric nitrogen is called nitrogen cycle.”

The nitrogen cycle consists of a series of reactions of nitrogen and its compounds. Almost all of these reactions take place through living organisms such as green plants and bacteria.

Process by which atmospheric nitrogen is consumed :-

1)As a result of electric discharges in the atmosphere , the nitrogen and oxygen present in the atmosphere combine to form nitric oxide. NO which further combines with oxygen to form nitrogen dioxide,NO2. The oxides combine with water to form nitrous acid HNO2 and nitric acid HNO3. These acids are carried down to soil by rain. These oxyacids combine with the lime present in soil to form nitrites and nitrates which are used up by the plants.