explain the process of nitrogen cycle step by step
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Answer:
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is atmosphere nitrogen,[16] making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.
The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.[17][18][19] Human modification of the global nitrogen cycle can negatively affect the natural environment system and also human health.[20][21
there are 5 steps in the nitrogen cycle
1)Nitrogen fixation
2)Assimilation
3)Ammonification
4)Nitrification
5)Denitrification
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1)Nitrogen fixation
in this step nitrogen is fixed r by microorganisms to the soil and the fixation of nitrogen is done by symbiotic bacteria and some other microorganisms
2)Assimilation
in this process the plants take up the nitrogen present in the soil for their own purpose and other organisms get nitrogen by consuming plants , ammino acids etc
3)Ammonification
When a plant or animal dies , the nitrogen will be in organic form and the microorganisms like bacteria or fungi convert the organic nitrogen into ammonia
4)Nitrification
In this step ammonium is converted into Nitrate by nitrifying bacteria and there are many reactions taking place dureing the conversion
5)Denitrification
In this process nitrate is converted into nitrogen gas which completes the nitrogen cycle