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Biology783Updated 24 Sept 20262 pages

Nitrogen Cycle GCSE: Diagrams, Questions & Biology Answers

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Lucinda Williams@lucindawilliams_tzaw
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The nitrogen cycle is a crucial biological process that involves the transformation and circulation of nitrogen in various forms throughout the environment. This cycle is essential for life on Earth, as nitrogen is a key component of DNA and proteins in living organisms. The process includes several stages such as nitrogen fixation, nitrification, assimilation, ammonification, and denitrification. Understanding this cycle is vital for agriculture and environmental science, particularly in the context of soil fertility and sustainable farming practices. The nitrogen cycle involves the conversion of atmospheric nitrogen into forms usable by plants and animals. Key processes include nitrogen fixation by bacteria and lightning, nitrification, assimilation into plant and animal proteins, and denitrification. Agricultural practices like crop rotation and the use of fertilizers play a significant role in managing nitrogen in soil. Both natural and artificial methods are used to restore soil fertility, each with their own advantages and disadvantages.
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