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nitrification

n.
1.the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
2.the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)

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    Idiom of the Day

    out of step
    not in step or keeping pace with someone
    The bandmembers were out of step when they were marching in the parade.



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