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What is nitrogen cycle

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What is nitrogen cycle

    • Posted by Appu Kumar 8 years, 4 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Amar Kumar 8 years, 4 months ago

    Nitrogen Cycle :Nitrogen cycle is all about the movement of nitrogen between various elements on Earth (like air, soil, living organisms etc.). The amount of nitrogen in the atmosphere remains constant. Atmosphere has approx. 78% nitrogen.

    Atmospheric Nitrogen is fixed into the soil N2 fixing microbes convert atmospheric N2 into nitrogen compounds like NH3 .
    Plants utilize nitrogen from soil through their roots .
    Animals utilize nitrogen, feeding on plants.
    When Plants & animals die, nitrogenous wastes are returned to soil.
    Decomposers convert some part to nitrogen compounds to be used by plants.
    Denitrifying bacteria convert  it into atmospheric N2  again.

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