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    Question

    Scheduling of irrigation depends on

    A soil moisture Correct Answer Incorrect Answer
    B evapotranspiration Correct Answer Incorrect Answer
    C plant growth stage Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    Scheduling of irrigation depends on all of the above factors: (A)   Soil moisture: The moisture content in the soil is a critical factor in determining when and how much irrigation is needed. Soil moisture sensors and measurements help in assessing the soil's water content. (B)   Evapotranspiration: Evapotranspiration (ET) is the combined process of water evaporation from the soil surface and transpiration from plants. Monitoring ET rates helps in estimating the water loss from the crop and guides irrigation scheduling. (C)   Plant growth stage: The stage of plant growth influences its water requirements. Different crops have varying water needs at different growth stages, so irrigation scheduling takes this into account to ensure optimal water supply.

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