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What is the Nitrogen Cycle?

Last Updated: February 08, 2008

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The Nitrogen Cycle involves different types of bacteria that change nitrogen to its various forms. Ammonia from decaying organic matter is converted to nitrite then nitrate. Plants use nitrate for cell growth. Animals eat the plants and use the nitrogen to form proteins. Certain types of bacteria can use nitrogen gas to make nitrate. Other types of bacteria can convert nitrate to nitrogen gas.

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