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    Which of the following is NOT true?
    Question

    Which of the following is NOT true?

    A.

    Soil aeration depends on volume fraction of air-filled pores

    B.

    Soil air has similar gaseous composition as of atmosphere

    C.

    Soil aeration is restricted in compacted soil

    D.

    Manuring increases CO₂ content in soil

    Correct option is B


    Soil air is not identical to atmospheric air.
    It generally contains higher CO₂ and lower O₂ due to root respiration and microbial activity.
    Hence, statement (b) is NOT true.

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