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PUEBLO AREA, COLORADO 17
<br /> um, subangular bloeky; hard, firm; sticky and yylactic; B1-6 to 10 inches,brown (7.5YR 5/3) silty clay loam, dark
<br /> thin, patchy, clay films on vertical faces of pens; Cal- brown (7.5YR 312) when moist; moderate, fine, angular
<br /> eareous; moderately alkaline; clear, wavy boundary. blocky structure; hard,friable; sticky and plastic; nearly
<br /> Clcs--14.to 23 inches,light yellowish-brown (2.5Y 614) silty continuous clay films on peds; neutral; clear, smooth
<br /> clay, olive brown (2.5Y 4/4) when moist; weak, fine, boundary,
<br /> angular blocky structure; hard,firm; sticky and plastic; B2t--10 to 30 inches, brown (7.5YR 513) heavy silty clay
<br /> calcareous; segregated gypsum in seams and threads; loam, dark brown (7.5YR 4/3) when moist; moderate,
<br /> moderately alkaline; gradual, smooth boundary. medium, prismatic structure parting to strong, rr.edium,
<br /> C2--Z4 to 60 inches, pale-yellow (2.6Y 7/4) silty clay, angular blocky; hard, firm; sticky and very plastic;
<br /> yellowish brown (10YR 514) when moist; massive; patchy clay films on peds; mildly alkaline; clear, gradual
<br /> slightly hard, firm; sticky and plastic; calcareous; boundary.
<br /> scattered powdered lime and fine crystalline gypsum; 133-30 to 42 inches, brown (7.5YR 5/2) clay loam, brown
<br /> moderately alkaline. (7.SYR 412) when moist; weak, medium, prismatic
<br /> The Al horizon is silty clay loam to silty clay or clay 3 to structure parting to moderate, medium, subangular
<br /> 6 inches thick. The B2 horizon is clay, silty clay, or heavy blocky; herd, friable; sticky and plastic: patchy clay
<br /> clay loam 7 to 27 inches thick. A few cracks, as much as films on pens; mildly alkaline; clear, gra ) ;o Lou lijown
<br /> one-half inch wide, extend from the surface into the B2 Cca (7.. to 48 inches, light-brown (7.5YR h rd, f ;oam, brown
<br /> horizon when the soil dries out. In some places there is no and
<br /> plastic;
<br /> q/4) when moist; massive; hard, triable; stick;:
<br /> Ces horizor Shale is at a depth of 40 inches to several feet. threads
<br /> plastic; strongly calcareous; fine filaments or
<br /> thrcaJs of lime; moderately alkaline, abrupt, smooth
<br /> He--Hell ;illy clay loam, 2 to 6 percent slopes. This boundary.
<br /> gently sloping soil is on alluvial fans below' outcrops IIR-48 inches, sandstone.
<br /> of limestone or shale.The areas are elopgated and cover The Al horizon is silt loam to loam 4 to 8 inches thick.
<br /> as much as 600 acres. This soil has the:profile described The dark-colored surface Dyer ranges from 8 to 16 idihes
<br /> thick. The B horizon is heavy clay loam or silty clay 101111
<br /> as representative of the series, but in' the western 18 to 38 inches thick. It has a hue of 7.5YR or 10YR and
<br /> part of the survey area the surface layer and subsoil chroma of 2 to 4. Depth to the IIR horizon of sandstone or
<br /> are generally clay. The clay is hard or very hard when to a IIC horizon of red clayranges from 40 to 72 inches or
<br /> more. Depth to free lime is more than 40 inches. In places
<br /> dry and Very firm When mOlst,
<br /> as much as 10 percent of the material is coarse channery
<br /> Included with this soil in mapping are areas of Wiley- sandstone.
<br /> Kim loamy that make up about 5 percent of the acre- Ho—Holderness silt loam, 3 to 9 percent slopes. This
<br /> age. Also included are areas of Razor cloy loam that soil is on foothills in the western part of the survey
<br /> make up about 5 percent. area. The slope is mostly more than 5 percent. The
<br /> Runoff is rapid, and the hazard of erosion is high. areas are irregular in'shape and cover as much as
<br /> grasses soil is used mostly for grazing. The native 600 acres. This soil has the profile described as repre-
<br /> grasses are mainly blue grams, , nonia, and western sentative of the series, but in small swales the surface
<br /> whea lain s. Capability unit VIe-2, nonirrigated; Alka- layer is somewhat thicker.
<br /> line Plains range site. Included with this soil iA.mappipg are areas of Nunn
<br /> soils at lower elevations and on exposures that have a
<br /> Holderness Series higher average annual soil temperature. These areas
<br /> The Holderness series consists of deep, well-drained make up about 10 percent of the acreage. Also included
<br /> sails. These soils formed on foothill slopes in loess and are areas of Stroupe soils that maka,up about 5 percent
<br /> residuum that derived from sandstone. The slope is 3 of the acreage.
<br /> to 9 percent, and elevation is 6,500 to 7,200 Peet. The Runoff is moderate or rapid, and the hazard of ero-
<br /> average annual precipitation is 18 inches. The average Sion is high. Gully erosion is common,
<br /> annual temperature is 45o F, and the frost-free season This soil is suited to pasture and grazing. The native
<br /> is 125 to 135 days, The native vegetation is r4ainly grasses are mainly bluegrass and wheatgrass. Capability
<br /> foothills grasses. unit IVe-3, nonirrigated;.Loamy Park range site.
<br /> In a representative profile the surface layer is gray- '
<br /> ish-brown silt loam about 6 inches thick. The upper Keyner Series
<br /> part of the subsoil is brown heavy silty clay toaln The I(eyne�,series consists of deep, tyell drained soils.
<br /> about 24 inches thick, and the lower part is brown clay These soils for
<br /> rrled on terraces in loamy alluvium. The
<br /> loam about 12 inches thick. The underlying material is slope is 2.to 4 percent, and elevation is 4,500 to 5,400
<br /> light brown loam. Sandstone is at a depth of 48 inches. feet. The average anttu4,,piecipitation is 12 inches.
<br /> Permeability is slow, and the available water capac- The average .annual temperature is 530 F, and the
<br /> ity is high. The surface and subsurface layers are neu- frost-free seagop is 145 to 175 days. The native vegeta-
<br /> tml, and the underlying material is moderately alka- tion is mainly plains 4-asses.
<br /> line. The root zone extends to a depth of 40 to 60
<br /> inches or more. These Soils are used for grazing, hay, Ina repceSentativq profile the ourface layer is light
<br /> and small grain. brownish-gray-loamy, One sand about 5 inches thick.
<br /> The subsoil is,pale-brolyn sandy-clay loam about 10
<br /> Representative profile of Holderness silt loam, 3 to inches thick. The u derlying material is very pale
<br /> t 9 percent slopes, in native grass, 0.4 mile south and brown or light browrt pph-gray, ity.'Slay`loam or clay
<br /> 300 feet west of the northeast corner of sec. 26, T. 22 loam about 9 inches thick. Below that it is light-gray
<br /> S., R. 68 W. or very pale brown sandy loam that extends to a depth
<br /> AI—O to 6 inches,griy�sh-brown (10YR 5/2) silt loam,very of 60 inches or more.
<br /> dark brown MY1i 2/2) when moist; moderate, medium permeability is slow, and the available water capac-
<br /> granular structure; soft, very friable; nonstickv mj
<br /> slightly plastic; neutral; clear, smooth boundary ity is high. The surface layer and subsoil are moder-
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