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    Question

    Which one the following crop is called biological plough

    of soil?
    A Green gram Correct Answer Incorrect Answer
    B Blackgram Correct Answer Incorrect Answer
    C Pigeon pea Correct Answer Incorrect Answer
    D Soybean Correct Answer Incorrect Answer

    Solution

    Pigeonpea plant is known to provide several benefits to soil such as fixing atmospheric nitrogen, adding organic matter and micro nutrients, and breaking hard plough pan with its long tap roots, also enables it to cycle back leached nutrients from deep in the soil to the surface layers. Therefore its called as biological plough of soil.

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