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    Question

    In the context of irrigation scheduling, what does the

    “IW/CPE ratio” represent?
    A Rainfall to evapotranspiration ratio Correct Answer Incorrect Answer
    B Ratio of irrigation water to pan evaporation Correct Answer Incorrect Answer
    C Water application rate Correct Answer Incorrect Answer
    D Crop coefficient Correct Answer Incorrect Answer
    E Soil infiltration rate Correct Answer Incorrect Answer

    Solution

    The IW/CPE ratio is used to determine when to irrigate crops. IW is the depth of irrigation water, and CPE is the cumulative pan evaporation. This ratio helps maintain soil moisture at optimal levels.

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