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31 October, 03:29

Describe five instances in the nitrogen cycle where bacterial action is important

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  1. 31 October, 03:30
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    Some stages of the nitrogen cycle where bacteria have a high significance are:

    1) Nitrogen fixing in the root nodules of legumes

    Nitrogen fixing bacteria reside in the root nodules of leguminous plants, where they fix atmospheric nitrogen into forms of nitrogen usable by the plant.

    2) Nitrogen fixation in the soil

    Some nitrogen fixing bacteria live in the soil, converting atmospheric nitrogen to usable forms.

    3) Decomposition

    Bacteria also play a role in decomposing organic matter, where the complex nitrogen containing compounds present within organisms are converted to simpler forms of nitrogen and released into the soil

    4) Nitrification

    Bacteria present in the soil convert ammonium ions to nitrite ions

    Moreover, other bacteria convert nitrite ions to nitrate ions

    5) Denitrifying bacteria

    These bacteria convert nitrogen in the soil to atmospheric nitrogen and release it from the soil
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