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<br />MAY 1982 <br /> <br />FIGUKE 11-1 MULTI-OBJECTIVE PLANNING TEAM <br />McELMO CREEK SALINITY CONTROL STUDY, COLORADO <br /> <br />TEAM LEADER <br /> <br />PUBLIC PARTICIPATION <br /> <br />REPORTS <br /> <br />TECHNICAL WORK GROUP <br /> <br />WATER <br />RESOURCES <br /> <br />LAND <br />RESOURCES <br /> <br />ENGINEERING <br /> <br />ENVIRONMENTAL <br />SOCIAL AND <br />ECONOMICS <br /> <br />Irrigation Management Scheduling <br /> <br />A basic assumption in irrigation water management is that the maximum <br /> <br />amount of soil moisture to be replaced is relatively fixed for each <br /> <br />irrigation depending on allowable moisture depletion for the soil and the <br /> <br />crop. However, frequency of irrigation, varying throughout the season and <br /> <br />depending on meteorological conditions affecting daily water requirements <br /> <br />for each crop, was not a consideration in plan formulation. Therefore, <br /> <br />irrigation scheduling will be a useful addition to the onfarm salinity <br /> <br />control program. By comparing crop consumptive use requirements and soil <br /> <br />moisture depletion rates over short intervals scheduling projects the time <br /> <br />for the next irrigation to prevent stress in the crop. Scheduling also <br /> <br />recommends the amount of water needed to replenish soil moisture, along with <br /> <br />the time of irrigation set to apply the needed amount of water. <br /> <br />II-5 <br /> <br />oalS31 <br />