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<br />should be put up to keep livestock out, unwanted burn-
<br />ing shogld be prevented, and the wetlands should not be
<br />drained. Natural wetland plants should be allowed to
<br />grow. These soils also provide valuable summer range
<br />for big game.
<br />Seasonal flooding and depth to the water table limit
<br />community development and recreation. Adequate drain-
<br />age and protection from floods would be necessary
<br />before development could be attempted. These soils can
<br />be reserved as greenbelts or for other restricted uses.
<br />These soils are in capability subclass Vlw, nonirrigat-
<br />ed.
<br />21-Cushman-Lazear stony looms, 15 to 65 per-
<br />cent slopes. These hilly to very steep soils are on
<br />mountainsides and mesa breaks. Elevation ranges from
<br />5,000 to 7,000 feet. The soils formed in sandstone and
<br />shale residuum. The average annual precipitation is
<br />about 13 inches, the average annual air temperature is
<br />about 48 degrees F, and the average frost-free period is
<br />about 125 days.
<br />The Cushman soil makes up about 45 percent of the
<br />map unit, and the Lazear soil makes up about 40 per-
<br />cent. The Cushman soil is on the landscape where allu-
<br />_ vium has accumulated to a greater depth over bedrock,
<br />and the Lazear sail is on the more steep areas.
<br />The Cushman soil is moderately deep and well
<br />drained. Typically, the surtace layer is grayish brown
<br />stony loam about 3 inches thick. The subsoil is dark
<br />grayish brown sandy loam about 8 inches thick. The
<br />substratum is light brownish gray loam and very gravelly
<br />loam. Shale and sandstone is at a depth of 32 inches.
<br />Permeability of the Cushman soil is moderate above
<br />bedrock, and available water capacity is low. Effective
<br />rooting depth is 20 to 40 inches. surtace runoff is
<br />medium, and the erosion hazard is severe.
<br />The Lazear soil is shallow over bedrock and is well
<br />drained. Typically, the surtace layer is grayish brown
<br />stony loam about 4 inches thick. The underlying material
<br />is light brownish gray stony loam. Calcareous shale and
<br />sandstone is at a depth of 16 inches.
<br />Permeability of the Lazear soil is moderate above bed-
<br />. rock, and available water capacity is low. Effective root-
<br />. ing depth is 10 to 20 inches. Surface runoff is moderate-
<br />ly rapid, and the erosion hazard is severe.
<br />Included with these soils in mapping are small areas of
<br />shale and sandstone outcrop and of Ildetonso sons. The
<br />Ildetonso soils are deep and very stony and have large
<br />accumulations of calcium carbonate. They are on very
<br />steep mesa breaks. These areas make up about 15
<br />percent of the map unit.
<br />These soils are used mainly for wildlife habitat and
<br />~ grazing.
<br />The native vegetation on these soils is mainly Utah
<br />juniper and pinyon. The understory consists of Salina
<br />wildrye, Indian ricegrass, beardless wheatgrass, galleta,
<br />SOIL SURVEY
<br />low phlox, stemless goldenweed, fourwing saltbush, ser-
<br />viceberry, shadscale, bitterbrush, and big sagebrush.
<br />When the undersiory vegetation deteriorates, only a
<br />few torbs and shrubs remain. Properly managing the
<br />vegetation maintains wood production and grazing. Se-
<br />lectively thinning the pinyon and juniper improves grazing
<br />and provides firewood and posts. Steep slopes and the
<br />erosion hazard affect harvesting.
<br />These soils can produce about 6 cords of wood per
<br />acre when trees more than 4.5 feet tall reach an aver-
<br />age diameter of 5 inches.
<br />Mule deer, gray squirrel, and cottontail rabbit find habi-
<br />tat on these soils.
<br />Use of these soils for community development and as
<br />a source of construction materials is limited by depth to
<br />bedrock and steep slopes.
<br />This complex is in capability subclass Vlls, nonirrigat-
<br />ed.
<br />22-Dateman gravelly loam, 30 to 50 percent
<br />slopes. This moderately deep, well drained, steep soil is
<br />on mountainsides. Elevation ranges from 7,000 to 9,500
<br />feet. This soil formed in sandstone and limestone residu-
<br />um. The average annual precipitation is about 20 inches,
<br />the average annual air temperature is about 38 degrees
<br />F, and the average frost-free period is less than 75 days.
<br />Typically, the upper part of the surface layer is very
<br />dark grayish brown gravelly loam about 3 inches thick,
<br />and the lower part is very dark grayish brown gravelly
<br />sandy loam about 6 inches thick. The substratum is dark
<br />yellowish brown very gravelly sandy loam. Limestone or
<br />sandstone bedrock is at a depth of 34 inches.
<br />Included with this soil in mapping are small areas of
<br />Farlow, Cochetopa, and Lamphier soils on the steeper
<br />parts of the landscape. They make up about 5 to 15
<br />percent of the map ~~nit.
<br />Permeability is moderate, and available water capacity
<br />is low. Effective rooting depth is 20 to 40 inches. Surface
<br />runoff is medium, and the erosion hazard is moderate.
<br />This soil is used mainly for wildlife habitat and grazing.
<br />The native vegetation on this soil is mainly Gambel
<br />oak, serviceberry, and mountain brome. A few small
<br />areas have some Douglas-Tir.
<br />When range condition deteriorates, fortis and shrubs
<br />increase. When the range is in poor condition, Kentucky
<br />bluegrass, undesirable weeds, and annual plants are nu-
<br />merous. Properly managing grazing maintains and im-
<br />proves range condition. Seeding and controlling brush
<br />are generally unsuitable because of the steep slopes.
<br />Elk, mule deer, blue grouse, snowshoe rabbit, and
<br />squirrel find habitat on this soil.
<br />Use of this soil for community development and as a
<br />source of construction material is limited by steep slope
<br />and depth to rock.
<br />This soil is in capability subclass Vlle, nonirrigated.
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