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Table 7-38 <br /> Consumptive Use Rates for Selected Irrigated Crops <br /> Annual <br /> Crop Type Consumptive Use (inches) <br /> Pasture Grasses 26.74 <br /> Alfalfa 31.68 <br /> Spring Grain 19.47 <br /> Silage Corn 21.02 <br /> Grain Corn 23.00 <br /> Grapes 19.44 <br /> Potatoes 25.37 <br /> Orchard Crops (w/cover) 29.35 <br /> Orchard Crops w/o cover) 21.28 <br /> Winter Wheat 17.76 <br /> From: Colorado Irrigation Guide, U.S. Department of Agriculture Soil Conservation Service <br /> (Field Office Technical Gluide, Section 4) <br /> 7-19 Revised 04/11/88 <br />