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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

    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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