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34 ~ 8OIL aU$YBY •
<br />of soils that are similar to Kirtley and Purner
<br />iut is which more sandstone fragments are in
<br />~ofile. Also included are areas of Rock outcrop.
<br />inclusions make up about 16 percent of the
<br />Runoff is rapid, and the hazard of erosion is severe.
<br />These soils are suited to pasture or native greases.
<br />Capability unit VIe-], dryland; Kirtley soil in Loamy
<br />Foothill range site and Purner soil in Shallow Foothill
<br />range site; not assigned to a windbreak suitability
<br />group.
<br />LwPorte Series
<br />The LaPorte series consists of shallow, well drained
<br />soils that formed in material weathered from lime-
<br />stone. These soils are on uplands and are underlain by
<br />limestone at a depth of 10 to 20 inches. Elevation
<br />ranges from 6,200 to b,8OO feet. Slopes are 3 to 30
<br />percent. The native vegetation is mainly blue grams,
<br />western wheatgrass, needleandthread, yucca, and
<br />pridrlypear cactus. Mean annual precipitation ranges
<br />lrom 13 to 16 inches, mean annual air temperature
<br />ranges from 48° to 60° F, and the frost-free season
<br />ranges from 136 to 160 days.
<br />In a representative profile the surface layer is ray-
<br />ish brown loam about 9 inches thick. The underlying
<br />material is light brownish gray channery loam about
<br />?inches thick. Below this is limestone bedrock.
<br />Permeability is moderate, and the available water
<br />capacity is low. Reaction is moderately alkaline.
<br />These soils are used mainly for native grasses.
<br />Representative profile of LaPorte loam in an area
<br />of LaPorte-Rock outcrop complex, S to 30 percent
<br />elopes, in native grass, about 1,712 feet north and 321
<br />feet west of the southeast corner of sec. 1, T. 4 N., R.
<br />70 W.:
<br />Al-O to 9 inches; grayish brown (lOYR 6/2)
<br />loam, very dark grayish brown (lOYR
<br />3/2) moist; moderate fine crumb struc-
<br />ture; slightly hard, very friable; 6 per-
<br />cent limestone fragments; calcareous;
<br />moderately alkaline; clear smooth
<br />Cca-9 to 16 inches; light brownish gray (lOYR
<br />6/2) channery loam; dark grayish brown
<br />(lO R 4/2) moist; massive; slightly
<br />hard, friable; some visible secondary
<br />calcium carbonate mostly as concre-
<br />tions; 30 percent limestone fragments;
<br />calcareous; moderately alltaline; gradual
<br />smooth boundary.
<br />R-16 inches; weakly fractured limestone.
<br />The A horizon is loam or fine sandy loam 6 to 16
<br />inches thick. Content of rock fragments ranges from
<br />6 to 36 percent.
<br />59-LaPorte•RocJc outcrop oompleY, 3 to 30 percent
<br />slops. This complex consists of gently eloping to steep
<br />soils on uplands and ridges. It is about 46 percent
<br />LaPorte loam and about 36 percent Rock outcrop. La-
<br />Porte loam is commonly on the eastern side of ridges
<br />and is on the smoother parts of the western aide, and
<br />Rodt outcrop ie commonly on ridgetops and on the
<br />western aide, but is throughout the complex. Rock
<br />outcrop is mainly limestone or limy shale.
<br />Included with this complex in mapping are about
<br />20 percent areas of Kim, Minnequa, and Midway soils.
<br />Runo@ is rapid, and the hazard of erosion is severe.
<br />This soil is suited to pasture and native grasses.lt
<br />has been used to a large extent for strip mines because
<br />the underlying limestone is used in the manufacture
<br />of cement. Capability unit VIIe-1, dryland; LaPorte
<br />soil in Shallow Foothill range site, and Rock outcrop
<br />not assigned to a range site; not assigned to a wiad•
<br />break suitability group.
<br />Lsrim Series
<br />The Larim series consists of deep, well drained soils
<br />that formed in mixed alluvium. These soils are on face,
<br />benches, and terrace edges and are underlain by very
<br />gravelly sand at a depth of 11 to 20 inches. Elevation
<br />ranges from 4,800 to 6,300 feet. Slopes are b to 40
<br />percent. The native vegetation is mainly blue grams,
<br />needlegrasses, side-oats grams, snakeweed, and some
<br />(orbs and shrubs. Mean annual precipitation ranges
<br />from 13 to 16 inches, mean annual air temperature
<br />ranges from 47° to 99° F, and the frost-free aeasoa
<br />ranges from 136 to 160 days.
<br />In a representative profile the surface layer is gray
<br />iah brown gravelly sandy loam about 4 inches thick.
<br />The subsoil is brown gravelly sandy clay loam about
<br />6 inches thick and pale brown very gravelly sandy
<br />loam about 6 inches thick. The underlying material ie
<br />light yellowish brown very gravelly loamy sand.
<br />Permeability ie moderate above a depth oP about 15
<br />inches and very raptd below that depth. The available
<br />water capacity >s low or medium. Reaction is neutral
<br />to mildly alkaline.
<br />These soils are used for native grasses.
<br />Representative profile of Larim gravelly sandy loam,
<br />6 to 40 percent slopes, in native grass, 1,760 feet west
<br />and 2,600 feet north of the southeast corner oP sec.
<br />22, T. 12 N., R. 68 W.:
<br />Al-O to 4 inches; grayish brown (lOYR b/2)
<br />gravelly Bandy loam, very dark grayish
<br />brown (lOYR 3/2) moist; weak medium
<br />aubangular blocky structure parting to
<br />weak medium granular; slightly hard,
<br />very friable, nonsticky and nonelastic;
<br />30 percent gravel; neutral; dear smooth
<br />boundary.
<br />B2t-~I to 9 inches; brown (lOYR 6/3) gravelly
<br />sandy clay loam, brown (lOYR 4/S)
<br />moist; pads in upper part are coated
<br />with dark brown (lOYR S/3) ; west
<br />medium subangguular blocky structure;
<br />hard, irlsble; slightly stlok and sllahtly
<br />plastic ; thin patchy clay f lma on ped+;
<br />Sb percent gravel; neutral; clear wavy
<br />boundary.
<br />BSca-9 to 16 inches; pale brown (lOYR 6/3)
<br />very gravelly sandy loam, brown (lOYB
<br />6 3) moist; weals medium eubanguLr
<br />b odty structure; slightly hard, vary fri•
<br />able, nonsticky and nonelastic; few
<br />patchy clay films on pads; 46 percent
<br />gradun~l smooth boundaryldly alkahne, '
<br />IIC-16 to 60 snchea; light yellowish brown
<br />
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