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14 • • Soih purvey <br />i <br />livestock water developments help to prevent range <br />deterioration and promote production of the more <br />desirable plant species. In renovating, seed should be <br />drilled into swell-prepared, firm, weed-free seedbed. <br />Suitable grasses for seeding are intermediate <br />wheatgrass, pubescent wheatgrass, western wheatgrass, <br />and Arizona fescue. <br />The soil is well suited to use as homesites. The towns <br />of Wl:stcfiife and Silver Cliff are on this soil. <br />This soil is in capability subclass Vle, nonirrigated. <br />11•-Feltonla-Coutis sandy loams, 6 to 15 percent <br />slopes. This complex is on fans and terraces. Elevation <br />is 7,800 to 8,500 feet. The average annual precipitation <br />is 14 to 17 inches, the average annual air temperature is <br />40 to 44 degrees F, and the frost•iree season is 55 to 75 <br />days. <br />Ther Feltonia soil makes up 50 percent of this <br />complex, and the Coutis soil makes up 35 percent. The <br />Feltonia soil is on the tops of rolling terraces, and the <br />Coutis soil is on foot slopes along drainageways. <br />Included with this complex in mapping are areas of <br />Silvercliff cobbly sandy loam along terraces edges. They <br />make up about 15 percent of the complex. <br />The Feltonia soil is deep and well drained. It formed in <br />alluvium. Typically, the surface layer is grayish brown <br />sandy loam B in,rnes thick. The subsoil is darK grayish <br />brown gravelly sandy loam 11 inches thick. The <br />substratum is light brownish gray gravelly sandy loam in <br />the upper 13 inches and is white very gravelly sandy <br />loam to a depth~of 60 inches or more. The soil is mildly <br />alkaline to a depth of 19 inches and moderately alkaline <br />and calcareous below that depth. <br />Permeability of this Feltonia soil is moderate, and the <br />available water capacity is low. The effective rooting <br />depth is 60 inches or more. Root growth is somewhat <br />restricted by the high content of calcium carbonato at a <br /> <br />Frgure r.-Formerly Bullied area of Coutis sandy loam, 5 to 15 percent slopes, backsloped and seeded to pubescent wheatgrass, <br />western wheatgrass, antl clover. <br />