Cycle de l'azote
by: laurent
This depicts a diagram of the nitrogen cycle, which is a process that explains how nitrogen moves through various forms in nature. Nitrogen is an essential element for life on Earth and plays a crucial role in many biological processes. In this diagram, there are several stages represented, including fixation, denitrification, nitrification, and nitrogen mineralization. The process begins with the fixation of nitrogen from the atmosphere by certain microorganisms that convert it into organic compounds such as ammonia (NH3) or proteins. This stage is represented by a small circle in the middle of the diagram, which signifies the conversion of atmospheric nitrogen to organic forms. The next step involves denitrification, where microorganisms convert these organic compounds back into nitrogen gas (N2) and release it into the atmosphere. This process is represented by a smaller circle on the left side of the diagram. The third stage in the cycle is nitrification, which occurs when nitrogen-fixing bacteria convert ammonia or other organic compounds to nitrate (NO3-) and
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