AFMC AFMC Solved Paper-2009

  • question_answer
    Certain bacteria                living in the soil poor in oxygen, convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as

    A) nitrogen fixing bacteria

    B) denitrifying bacteria

    C) ammonifying bacteria

    D) saprophytic bacteria

    Correct Answer: B

    Solution :

    The denitrifying bacteria reduce the nitrates and the ammonium salts to free nitrogen which escapes into the atmopshere, eg, Bacillus denitrificans. This process decreases fertility of the soil.


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