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28 SOIL SURVEY
<br /> rant,brush control is needed If the site is in poor condi- The capability subclass is Vie.
<br /> lion, seeding may be needed. Arizona fescue, big blue-
<br /> grass, slender wheatgrass, smooth brome, western 47—Leavitt loam, 15 to 55 percent slopes. This
<br /> wheatgrass,and intermediate wheatgrass are suitable for deep, well drained, moderately steep to steep soil is on
<br /> seeding. The seed should be drilled into a firm seedbed. mountainsides at elevations of 7,500 to 8.500 feet. It
<br /> This soil provides winter range for mule deer and elk. formed in local alluvium from sedimentary rock. The
<br /> i Other wildlife include sage grouse, jackrabbit, cottontail, average annual precipitation is about 14 to 18 inches,
<br /> and coyote. Livestock grazing management and sage- the average annual air temperature is about 37 to 42
<br /> brush control are necessary to protect the big game degrees F, and the frost-free season is about 35 to 75
<br /> winter range. days.
<br /> The low strength and high shrink-swell potential are Small areas of Harsha loam, Roxal loam, Lymanson
<br /> the soil properties most limiting to community develop- loam, and Tine cobbly sandy loam are included in map-
<br /> ment. ping.
<br /> The capability subclass is Vie. 'Typically the Leavitt soil has a grayish brown loam
<br /> surface layer about 6 inches thick. The subsoil is brown
<br /> 46—Leavitt loam,6 to 15 percent slopes.This deep, clay loam about 28 Inches thick. The substratum is pale
<br /> well drained, moderately sloping to strongly sloping soil brown Gay loam that extends to 60 inches or more.
<br /> is on fans and terraces at elevations of 7,500 to 8,600 Permeability is moderate. The effective roofing depth
<br /> feet. It formed in local alluvium from sedimentary rock. is 60 inches or more. The available water capacity is
<br /> The average annual precipitation is about 14 to 18 high. Surface runoff is medium, and the erosion hazard is
<br /> inches, the average annual air temperature is about 37 high.
<br /> to 42 degrees F.and the frost-free season is about 35 to Most of the acreage is rangeland. Part of it is used for
<br /> 75 days. recreation and wildlife. The cold climate and short grow-
<br /> Small areas of Harsha loam, Roxal loam, Lymanson ing season limit the production of introduced grasses
<br /> loam, and Tine cobbly loam are included in mapping. and preclude the use of this soil as cropland.
<br /> Typically the Leavitt soil has a grayish brown loam Rangeland vegetation is dominantly western wheat-
<br /> surface layer about 6 inches thick. The subsoil is brown grass,muttongrass, Idaho fescue,and big sage.
<br /> clay loam about 28 inches thick. The substratum is pale Grazing management is needed to maintain range
<br /> brown clay loam that extends to 60 inches or more. condition. If woody shrubs have become dominant, brush
<br /> Permeability is moderate. The effective rooting depth control is needed. The site is generally too steep to be
<br /> is 60 inches or more. The available water capacity is seeded with a drill.
<br /> high. Surface runoff is slow, and the erosion hazard is This soil provides winter range for mule deer and elk.
<br /> moderate. Other wildlife include sage grouse, jackrabbit, cottontail,
<br /> Most of the acreage is rangeland. Part of it is used for and coyote. Livestock grazing management and sage-
<br /> recreation and wildlife. A small acreage is irrigated and brush control are necessary to protect the big game
<br /> used for hay.The cold climate and short growing season winter range.
<br /> limit the production of introduced grasses and preclude The steep slope is the soil feature most limiting to
<br /> the use of this soil as cropland. community development. Road design should provide
<br /> Wheatgrass, muttongrass. Idaho fescue, and big sage- drainage outlets for surface runoff.
<br /> brush are dominant in the rangeland vegetation. The capability subclass is Vile.
<br /> Grazing no more than 50 percent of the key species,
<br /> by weight of the current season production.will maintain 48—Wghcon gravelly sandy loam, 15 to 70 per-
<br /> the condition of this site. If shrubs are dominant. brush cent slopes. This deep, well drained, moderately steep
<br /> control is needed. If the site is in poor condition, seeding to very steep soil is on mountainsides and ridges at
<br /> may be needed. Arizona fescue, big bluegrass, slender elevations of 9,500 to 11,400 feet. In a few small areas
<br /> wheatgrass, smooth brome, western wheatgrass, and in- the slope is steeper than 70 percent. This soil formed in
<br /> termediate wheatgrass are suitable for seeding. The material weathered from granite, gneiss, and metamor-
<br /> seed should be drilled into a firm seedbed. phic schist.The average annual precipitation is about 28
<br /> This soil provides winter range for mule deer and elk. to 36 inches, the average annual air temperature is
<br /> Other wildlife include sage grouse, jackrabbit, cottontail, about 32 to 37 degrees F, and the frost-free season is
<br /> and coyote. Livestock grazing management and sage- about 10 to 50 days.
<br /> brush control are necessary to protect the big game Small areas of Upson stony sandy loam, Scout cobbly
<br /> winter range. sandy loam, and Newcomb gravelly sandy loam are in-
<br /> The low strength, the shrink-swell potential,/and the cluded in mapping. A few small areas of Cryaquepts are
<br /> slopes are the features most limiting to community devel- also included.
<br /> opment. Road design should provide drainage outlets for . Typically the Leighcan soil has a duff layer about 2
<br /> surface runoff, inches thick of needles, twigs, and leaves. It has a sub-
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