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<br />nant, brush control is needed. If the site is in poor condi-
<br />tion, seeding may be needed. Arizona fescue, big blue-
<br />grass, slender wheatgrass, smooth brome, western
<br />wheatgrass, and intermediate wheatgrass are suitable for ,
<br />seeding. The seed should be drilled into a firm seedbed.
<br />This soil provides winter range Tor mule deer and elk.
<br />Other wildlife include sage grouse, jackrabbit, cottontail,
<br />and coyote. Livestock grazing management and sage-
<br />brush control ara necessary to protect the big game
<br />winter range.
<br />The low strength and high shrink-swell potential are
<br />the soil properties most limiting to community develop-
<br />.. ment. ,~
<br />The capability subclass is Vls.
<br />- __ -
<br />- '"° 46--Leavltt foam,-6-to 15 percent slopes. This deep,
<br />well drained, moderately sloping to strongly sloping soil
<br />is on fans and terraces at elevations of 7,500 to 8,500
<br />feel. It formed in local alluvium from sedimentary rock.
<br />The average annual precipitation is about 14 to 16
<br />inches, the average annual air temperature is about 37
<br />to 42 degrees F, and the frost-free season is about 35 to
<br />75 days.
<br />Small areas oT Harsha loam, Roxal loam, Lymanson
<br />loam, and Tine cobbly loam are included in mapping.
<br />Typically the Leavitt soil has a grayish brown loam
<br />surface layer about 6 inches thick. 'the subsoil is brown
<br />clay loam about 28 inches thick. The substratum is pale
<br />brown clay lozm that extends to 60 inches or more.
<br />Permeability is moderate. The effective rooting depth
<br />is 60 inches or more. Tlie available water capacity is
<br />high. Surface runoff is slow, and the erosion hazard is
<br />moderate.
<br />Most of the acreage is rangeland. Part of it is used for
<br />recreation and wildlife. A small acreage is irrigated and
<br />used for hay. The cold climate and short growing season
<br />limit the production of introduced grasses and preclude
<br />the use of this soil as cropland.
<br />Wheatgrass, muttongrass, Icialio fescue, and big sage-
<br />brush are dominant in the rangeland vegetation.
<br />Grazing no more than 50 percent of the key species,
<br />by weight of the current season production, will maintain
<br />the condition of this site. If shrubs are dominant, brush
<br />control is needed. If the site is in poor condition, seeding
<br />may be needed. Arizona fescue, big bluegrass, slender
<br />wheatgrass, smooth brome, western wheatgrass, and in-
<br />termediate wheatgrass are suitable for seeding. The
<br />seed should be drilled into a firm seedbed.
<br />This soil provides winter range for mule deer and elk.
<br />Other wildlife include sage grouse, jackrabbit, cottontail,
<br />and coyote. Livestock grazing management and sage-
<br />brush control are necessary to protect the big game
<br />winter range.
<br />Tho low strength, the shrink-swell potential, and the
<br />slopes are the features most limiting to community devel-
<br />opment. Road design should provide drainage outlets for
<br />surface runoff.
<br />The capability subclass is Vfe.
<br />SOIL
<br />47-Leavltt .loam, 15 to 55 percent slopes. Th'ia-
<br />deep, welt drained, moderately steep to steep soil is on -~:
<br />mountainsides at elevations of 7,500 to 8,500 feet it ~R'
<br />formed in local alluvium from sedimentary rock. Tha •~•
<br />average annual precipitation is about 14 to 18 inches; >'?
<br />the' average annual air temperature is about 37 to 42.
<br />degrees F, and the frost-tree season is about 35 to 75.°';
<br />days. w_ i
<br />Small areas of Harsha loam, Roxal loam, Lymenson ~;_
<br />loam, and Tine cobbly sandy loam are included in map-,;;;-
<br />Ping• ~:: _~;
<br />Typically the Leavitt soil has a grayish brown loam:'
<br />~surtace layer about 6 inches thick. The subsoil is brown:::'
<br />clay loam about 26 inches thick. The substratum is pale
<br />brown clay foam that oxlends to 60 inches or more. ' j,
<br />Permeability is moderate. The effective rooting depth.'
<br />is 60 inches or more. The available water capacity is ;";
<br />high. Surface runoff is medium, and the erosion hazard is
<br />high. -
<br />Most of the acreage is rangeland. Part of it is used for~!~~
<br />recreation and wildlife. The cold climate and short grow-=-.,~;
<br />ing season limit the production of introduced grasses: -s.
<br />and preclude the use of this soil a^ cropland.
<br />Rangeland vegetation is dominantly western wheat-_ .
<br />grass, muttongrass, Idaho fescue, and big sage.
<br />Grazing management is needed to maintain range
<br />condition. If woody shrubs have become dominant, bn.~sir .
<br />control is needed. The Site is yenerally too steep to be; ;".:
<br />seeded with a drill.
<br />This soil provides winter ranye for mule deer and elk -;-
<br />Other wildlife include sage grouse, jackrabbiT, cottontail,
<br />and coyote. Livestock graziny management and sage-_ .:
<br />brush control are necessary to protect the big game .. _
<br />winter range.
<br />The steep slope is the soil feature most limiting to
<br />community development. Road deslgn should provide _.-:'
<br />drainage outlets for surface runoff. •~ .
<br />The capability subclass is Vlle. a;
<br />..;;:.
<br />48-Lelghcan gravelly sandy loam, 15 to 70 pe-- ' `
<br />cent slopes. This deep, well drained, moderately steep. " ;
<br />to very steep soil is on mountainsides and ridges et -
<br />elevations of 9,500 to 11,400 feet. In a few small areas -;
<br />the slope is steeper than 70 percent. This soil formed im-
<br />material weathered from granite, gneiss, and metamor• %~':
<br />phic schist. The average annual precipitation is about 28 `p
<br />to 36 inches, the average annual air temperature is
<br />about 32 to 37 degrees F, and tho frost-tree soason ~ - ~-+~
<br />about 10 to 50 days. ~.= :-;
<br />Small areas of Upson stony sandy loam, Scout cobbly
<br />sandy loam, and Newcomb gravelly sandy loam are In•
<br />eluded in mapping. A few small areas of Cryaquopts ara 1r
<br />also included. '~, ;'~,
<br />Typically the Leighcan soil has a duff layer about=
<br />inches thick of needles, twigs, and leavos. Il has a sutra'
<br />_~-'~ 1*:
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