nitrogen cycle

Introduction

CE5

Nitrogen cycle

nitrogen cycle, the continuous flow of nitrogen through the biosphere by the processes of nitrogen fixation, ammonification (decay), nitrification, and denitrification. Nitrogen is vital to all living matter, both plant and animal; it is an essential constituent of amino acids, which form proteins of nucleic acids, and of many other organic materials.

Sections in this article:

Introduction
Effects of Artificial Fixation
Other Aspects of the Nitrogen Cycle
Nitrogen Fixation

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