write a short note on nitrogen cycle with diagram
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Nitogen cylce
Nitrogen cycle
BIOCHEMISTRY
WRITTEN BY: The Editors of Encyclopaedia Britannica
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Alternative Title: nitrogen budget
Nitrogen cycle, circulation of nitrogen in various forms through nature. Nitrogen, a component of proteins and nucleic acids, is essential to life on Earth. Although 78 percent by volume of the atmosphere is nitrogen gas, this abundant reservoir exists in a form unusable by most organisms. Through a series of microbial transformations, however, nitrogen is made available to plants, which in turn ultimately sustain all animal life. The steps, which are not altogether sequential, fall into the following classifications: nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification.