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    Question

    Which among the following is a major constraint in the

    rice–wheat system of Indo-Gangetic plains affecting long-term sustainability?
    A High rainfall Correct Answer Incorrect Answer
    B Weed diversity Correct Answer Incorrect Answer
    C Soil micronutrient depletion Correct Answer Incorrect Answer
    D Frequent drought Correct Answer Incorrect Answer
    E High temperature during rabi Correct Answer Incorrect Answer

    Solution

    Continuous rice–wheat cropping without balanced fertilizer use leads to depletion of micronutrients (Zn, Fe, S). This reduces productivity and necessitates nutrient management interventions.

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