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Me MW <br />decrease, forbs and woody shrubs increase, and undesirable weeds and <br />annual plants invade and become more abundant. <br />This soil provides habitat for band - tailed pigeon, blue grouse, mule deer, elk <br />and black bear. Proper grazing use by livestock on these soils helps to <br />maintain good habitat for the larger wildlife. Grasses and forbs on this soil <br />provide summer range for mule deer and elk. <br />32 — Delson loam, 3 to 12 percent slopes. <br />This is a deep, well drained soil. It formed in stony alluvium and is on fans <br />and mesas. Elevation ranges from about 6,800 to 8,400 feet. Average <br />annual precipitation is about 17 inches, average annual air temperature is <br />about 44 degrees F, and the average frost -free season is about 100 days. <br />Permeability is slow, and available water capacity is high. Effective rooting <br />depth is 60 inches or more. Surface runoff is medium. The hazard of <br />erosion from wind is slight and from water is moderate. <br />Included with this soil in mapping ar a few small areas of Agua Fria, <br />Cochetopa, Cerro, and Saraton soils. In some areas the surface layer is <br />cobbly or stony or is light clay loam. <br />The native vegetation on this soil consists mainly of Gambel oak, <br />serviceberry, big sagebrush, and adapted grasses. <br />Because annual precipitation is low and has poor seasonal distribution, this <br />soil is not suited to nonirrigated crops. However, nonirrigated pasture <br />grasses can be planted late in summer and in fall to protect the soil from <br />erosion and to provide grazing for livestock, if good pasture management is <br />practiced. Crested wheatgrass, smooth brome, and pubescent wheatgrass <br />are adapted species. <br />The potential plant community on this soil consists mainly of wheatgrasses, <br />bluegrasses, and needlegrasses. As range condition deteriorates, <br />wheatgrasses and needlegrasses decrease, forbs and woody shrubs <br />PR -14 2.04-92- 03/14 <br />