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Ustic Torri~hents are shallc.w,, modern/ly deep and deep, and <br />well drained. They formed in coll~vium, alluvium, and residuum derivad <br />dominantly from interbedded sands+,one and shale. These soils are <br />highly variable, but a profile commonly observed in the survey area <br />has a surface layer of light brown bouldery clay loam about 4 inches <br />thick. The underlying material tc a depth of 31 inches is light gray <br />cobbly clay loam. Grey shale is z': a depth of 31 inches. <br />Permeability of the Ustic Torriorthents is moderate and moderately <br />slow. Available wator capacity is low to moderate. Effective rooting <br />depth is 10 to 60 inches. Runoff .s rapid, and the hazard of water <br />erosion is high. <br />This unit is used for limited Livestock grazing and wildlife <br />habitat. <br />The potential plant community on the Clapper soil is western <br />_, wheatgrass, galleta, Wyoming big sagebrush, with scattered pinyon pine <br />I and Utah juniper. The average annual production of air-dry vegetation <br />is about 600 pounds per acre. <br />The potential plant community on the Ustic Torriorthents part of <br />this unit is mainly Indian ricegrass, galleta, and scattered pinyon <br />pine and Utah juniper. <br />If the condition of the range deteriorates, Fendler threeawn, <br />sleepy grass, and curlycup gumweed increase. Where the range is in <br />poor condition, these plants are dominant. Grazing should be managed <br />so that th• desirable balance of species is maintained in the plant <br />community. <br />If the range vegetation is seriously deteriorated, seeding is <br />needed. For successful seeding, a seedbed should be prepared and the <br />seeds drilled. The plants selected for seeding should meet the <br />rf w <br />seasonal requirements of livestock or wildlife, or both. <br />~~ <br />