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    Question

    Plough Pan is developed due to

    A Repeated puddling Correct Answer Incorrect Answer
    B Use of surplus residue as a mulch Correct Answer Incorrect Answer
    C Green manuring Correct Answer Incorrect Answer
    D Use of gypsum Correct Answer Incorrect Answer

    Solution

    They can be broken up by using a subsoiler or by deeper ploughing. Pans may also be formed by the deposition of iron compounds, and sometimes humus, in layers in the soil or subsoil.

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