Question

How can you say that nitrogen in the atmosphere remains constant? Explain the nitrogen cycle?
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Answer 1

Answer:

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Explanation:

ANSWER

The percentage of nitrogen in the atmosphere remains constant through the nitrogen cycle. The reservoir pool in the atmosphere contains nearly 78%  as nitrogen. Molecular nitrogen cannot be utilized directly by plants. It has to be fixed or converted into compounds prior to utilization. This conversion of atmospheric nitrogen into usable compound if nitrogen is called nitrogen fixation. 

Answer 2

Answer:

The percentage of nitrogen in the atmosphere remains constant through the nitrogen cycle. ... Molecular nitrogen cannot be utilized directly by plants. It has to be fixed or converted into compounds prior to utilization. This conversion of atmospheric nitrogen into usable compound if nitrogen is called nitrogen fixation