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<br />3/81 <br />LSD <br />H11D-Nolen loam, 3 to 9 peroent slopes. 'lriis deep, sell drained <br />soil is on uplands and valley side slopes. It fornied in allw.ium derived <br />dominantly fran sedimentary rock. The native vegetation is mainly grass. <br />Elevation is 6,500 to 7,800 feet. The average annual precipitation is <br />about 17 to 22 inches, the average annual air temperature is 46 to 50 <br />degrees F, and the average frost-free season is 90 to 120 days. <br />Typically, the surface layer is loam 6 inches thick. The subsoil is <br />clay loam 33 inches thick. The substratum to a depth of 60 inches or more <br />is loam. The soil is neutral to a depth of 27 inches and mildly alkaline <br />below that depth. Depth to calcareous material rarxles from 40 to 60 <br />inches. <br />Included in this unit is 15 percent Nolen sandy loam. <br />Permeability of this Nolen soil is moderate to a depth of 39 inches and <br />moderately rapid below that depth. Available watec capacity is high. <br />Effective rooting depth is 60 inches or more. Runoff is medium, and the <br />hazard of water er~irn is medium to very high. <br />This unit is used as rangeland and irrigated hayland. <br />The potential plant crnmunity on this unit is mainly western <br />wheatgrass, blue grams and little bluestem. Other less numerous plants are <br />Indian ricegrass, prairie junegrass, and sideoats grams. The average <br />annual production of air-dry vegetation is 1,300 pounds per acre. If the <br />condition of the range deteriorates, sleepygrass, fringed sagebrush, red <br />threeawn, and pricklypear increase. Rarge seedirg is suitable if the range <br />is in poor condition. <br /> <br />