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    Question

    In the calculation of water use efficiency (WUE), which

    two parameters are essential?
    A Total rainfall and evaporation Correct Answer Incorrect Answer
    B Irrigation frequency and yield Correct Answer Incorrect Answer
    C Crop yield and water used Correct Answer Incorrect Answer
    D Rainfall intensity and slope Correct Answer Incorrect Answer
    E Runoff and infiltration rate Correct Answer Incorrect Answer

    Solution

    Water use efficiency = Crop yield / Total water used. It reflects how efficiently a crop converts water into biomass or economic yield. Higher WUE is desirable, especially under water scarcity.

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