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t• li <br />.~20 -CD 7/83 <br />76--Witt loam, 3 [0 8 percent slopes. This deep, well drained soil <br />is on gently sloping to sloping uplands and mesas. I[ formed in calcareous <br />loess. Elevation is 6,200 to 7,500 feet. The average annual precipitation <br />is about 14 to 17 inches. The average annual air temperature is 45 to 50 <br />degrees F., and the average frost-free period is 110 to 130 days. <br />Typically, the surface layer is brown loam about 7 inches [hick. The <br />lower part of the surface layer is reddish brown loam about 3 inches thick. <br />The upper part of the subsoil is reddish brown silty clay loam about 9 <br />inches thick. The next part is a reddish brown silty clay loam about 15 <br />inches thick. The lower part is light reddish brown loam about 14 inches <br />thick. The substratum is yellowish red loam to a depth of 60 or more. <br />Included in this unit is about 5 percent Pulpit loam. Also included <br />are small areas to Witt loam eroded and Simpatico loam. <br />Permeability is moderately slow. Effective rooting depth is 60 inches <br />or more. Available water capacity is high. Surface runoff is medium and <br />the hazard of water erosion is moderate. <br />This soil is used mainly for irrigated crops, nonirriga[ed crops, and <br />rangeland. Alfalfa, barely and oats are grown on irrigated areas. Wheat, <br />pinto beans and alfalfa are grown on nonirriga[ed areas. <br />The primary management concerns on irrigated areas are controlling soil <br />erosion by water, maintaining the organic matter content and fertility in <br /> <br />the surface layer and the proper use of irrigation water. <br />