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<br />4. Irrigation Requirements of Cotton on Clay Loam Soils in the <br />Salt River Valley - Karl Harris and R. S. Hawkins. Arb.. Agr. <br />Ex;pt. Sta. BuJ.. 181. 1942. . <br /> <br />5. Drainage Investigation in Irrigated Areas of Imperial Valley, <br />California - William W. Donnan, V. S. Aronovici and Harry F. <br />Blaney, S.C.S. 1947. <br /> <br />6. Consumptive Use of Water in the Irrigated Areas of the Upper <br />Colorado River Basin - Harry 'F. Blaney and Wayne D. Criddle. <br />Div. of Irrig. and Water Con~ervation, S.C.S. 1949. <br /> <br />7. Determining Water Reg,uirements in Irrigated Areas from <br />Climatological and Irrigation Data- Blaney and Criddle. <br />S.C.S., U.S.D.A. SCS-TP-96. 1950. <br /> <br />8. Cons1llllptive Use of Irrigation Water by Crops in Nevada by <br />Clyde E. Houston. Bu1. 185, ,Nevada Agr. Ex;pt. Station. 1950. <br /> <br />9. Drainage Investigations in IlJrperial Valley, A 10-Year Summary - <br />William W. Donnan, George B., Bradshaw and Harry F. Blaney. <br />S.C.S. (In press). 1952. . <br /> <br />10. Cons1llllptive Use and Irrigation Requirements of Crops in <br />Arizona - Blaney and Harris. S.C.S. 1952. <br /> <br />11. Drainage Investigation Methods for Irrigated Areas of Western <br />United States - William W. Donnan and George B. Bradshaw. <br />S.C.S. Tech. BuJ.. 1065. 1952. <br />, <br />I <br /> <br />12. Water Spreading in San Joaquin Valley - Dean Muckel and <br />Leonard Schiff. <br /> <br />A knowledge of consumptive use and its ralationship to water supply <br />is necessary in planning a farm irrigation system and improving irrigation <br />practices. <br /> <br />During recent years, at the reg,*est of Qperations Division of the <br />Soil Conservation Service and other Federal and Stat.e Agencies, the DivisiQn <br />of Irrigation Engineering and Water Conservation staff has compiled. available <br />data and d.etermined con6Ulll;J?tive uSe and irrigation water requirements for <br />crops in the West. In some districts the.se data are necessary before the <br />safe yield of the underground water basins can be estimated. <br /> <br />In cooperation with the State.Engineer of California, engineering <br />studies are being made of water cons1llllptlon by irrigated crops and native <br />vegetation in the Santa Margarita River !Basin in Riverside and San Diego <br />counties. Assistance is being rendered ;on water spreading in Central <br />Valley and in estimating con6Ulll;J?tive use and irrigation requirements fOr <br />the entire State of California. <br /> <br />In water supply investigations of river basins'Eluch as the Colorado <br />River, con6Ulll;J?tive use and. ultimate watElr requirement for irrigation projects <br />are important factors. From. a valley-wide standpoint, cons1llllptive use includes <br />, <br /> <br />-10... <br />