6.4.10. Irrigation Scheduling
For efficient management of an irrigation system, it is necessary that the water be supplied to the plants when they need it and in quantities actually required by the plants. This necessity leads one to irrigation scheduling which means estimating the starting time, stopping time, and the quantity of water for different cycles of irrigation during the crop period. Irrigation scheduling can be determined by using one of three approaches, viz., (i) the soil-moisture
depletion approach, (ii) the climatological approach using evaportranspiration and effective rainfall data, and (iii) the farmer’s existing schedule approach. A study on optimal irrigation scheduling for wheat crop of Udaipur region (21) has indicated that the soil-moisture depletion approach results in maximum water use efficiency.
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