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<br />PUEBLO AREA, COLORADO
<br />shale at a depth of 10 to 20 inches. The slope is 1 to 9
<br />percent, and elevation is 4,400 to 5,800 feet. The aver-
<br />age annual precipitation is 12 inches. The average
<br />annual temperatttl•e is 53° F, and the frost-free season
<br />is 145 to 175 days. The native vegetation is mainly
<br />short glasses of the plains.
<br />In a representative profile the sul•face layer is light
<br />brownish-gl•ay silty clay loam about 3 inches thick. The
<br />subsurface layer is pale-brown silty clay- loam about
<br />9 inches thick. The underlying material is light-gray
<br />silty clay loam about 6 inches thick. Light-gray soft
<br />shale is at a depth of about 13 inches.
<br />Permeability is moderate, and the available water
<br />capacit}' is love. These soils are model•ately alkaline.
<br />Theit• root zone extends to a depth of 10 to 20 inches.
<br />They are used for grazing.
<br />Repl-esentative profile of Shingle silty clay loam, 1
<br />to 9 pet•cent slopes, in glass, 0.3 mile south and 0.17
<br />mile east of the northwest corner of sec. 26, T. 26 S.,
<br />R. 60 \V.
<br />A-0 to 3 inches, light brownish-gray (10]'R 6/2) silty
<br />cloy loam, dark grayish brown (lOYR 4/2) yvhen moist;
<br />moderate, eery fine, granular structure; loose, friable;
<br />slightly sticky and plastic; calcareous; moderately alka-
<br />line; abrupt, smooth boundary.
<br />AC-3 to 7 inches, pale-brown (lOYR 6/3) silty clay loam,
<br />brovvn (lOYR 5/3) when moist; yveak, medium and fine,
<br />subangular blocky structure; hard, friable; slightly
<br />sticky and plastic; calcareous; moderately alkaline;
<br />abrupt, smooth boundary.
<br />C1-7 to 13 inches, light-gray (30]'R 7/2) silty cla}• loam,
<br />gray (lOYR 4/1) when moist; yvcak, medium, sub-
<br />angular block structure; hard, friable; sticky and plas-
<br />tic; calcareous; moderately alkaline; abrupt, wavy
<br />boundary.
<br />C2-13 inches, light-gray (lOYR 7/2) soft shale.
<br />The A horizon is clay loam or silty cla}• loam 3 to 8 inches
<br />thick. The C horizon is clay loam or silty clay loam 6 to 1 i
<br />inches thick. IC has a small amount of small chips of
<br />yeeathered limestone or shale. Depth to soft, calcareous
<br />shale ranges from 10 to 20 inches.
<br />SgI)-Shingle silty cla}• loam, I to 0 percent slopes.
<br />This soil is scattel•ed ovet• the plains part of Pueblo
<br />County. The slope ranges from 1 to 9 percent but is
<br />mainly less than 5 percent. The areas cover as much
<br />as 80 acl•es.
<br />Included with this soil in mapping are areas of
<br />DIinnegtta soils, vvhiclt make tip about 10 percent of
<br />the acl•eage.
<br />Runo(I is medium, and the hazard of erosion is
<br />moderate.
<br />This soil is better suited to grazing than to other
<br />uses. The native vegetation is mainl}• alkali sacaton,
<br />western wheatgl•ass, blue grama, galleta, winterfat,
<br />and some cactus. Capability unit VIIs-1, nonirrigated;
<br />Shaly Plains range site.
<br />Stoneham Series
<br />The Stoneham series consists of deep, well-drained
<br />soils. These soils formed olt high tel•races in loamy
<br />alluvium. The slope is 0 to 3 percent, and elevation is
<br />4,500 to 5,500 feet. The avel•age annual precipitation
<br />is 12 inches. The average annual temperature is 53° F,
<br />and the frost-free season is 145 to 175 days. The
<br />native vegetation is mainly short plains grasses.
<br />In a representative profile the surface layer is light
<br />33
<br />brownish-gray loam about 4 inches thick. The upper
<br />part of the subsoil is blown clay loam about 3 inches
<br />thick, and the lower part is pale-brown clay loam about
<br />7 inches thick. The underlying material is very pale
<br />blown and pale brown loam that extends to a depth of
<br />60 inches or mole.
<br />Permeability is moderate, and the available water
<br />capacity is high. The surface layer and the upper part
<br />of the subsoil al•e mildly alkaline, and the lower part of
<br />the subsoil is model•ately alkaline. The root zone ex-
<br />tend; to a depth of mole than 60 inches. These soils
<br />are used almost exclusively for grazing.
<br />Repl•esentative profile of Stoneham loam,. in grass,
<br />100 feet north of the center of sec. 14, T. 18 S., R. 65 ~V.
<br />Al-0 to 4 inches, light brownish-gray (lOYR 6/2) loam,
<br />dark brown (lOYR 3/3) when moist; weak, medium,
<br />platy structure parting to weak, fine, granular; slightly
<br />hard, friable; slightly sticky and slightly plastic; mild-
<br />ly alkaline; clear, smooth boundary.
<br />B2[-4 to 7 inches, brown (lOYR 5/3) clay loam, dark brown
<br />(lOYR 4/3) when moist; moderate, m^dium, prismatic
<br />structure parting to moderate, medium, subangular
<br />blocky: hard, friable; sticky and plastic; thin, patchy,
<br />clay films on pads; mildly alkaline; clear, smooth
<br />boundary.
<br />Baca-i to 14 inches, pale-brown (lOYR 6/3) clay loam,
<br />dark brown (lOYR 9/3) when nvoist; weak, coarse,
<br />prismatic structure parting to weak, medium, sub-
<br />angular blocky; hard, friable; slightly sticky and slight-
<br />ly plastic; calcareous; small soft masses of lime; mod-
<br />erately alkaline; clear, smooth boundary.
<br />Clca-14 to 23 inches, ver}• pale brox~n (lOYR 7/3) loam,
<br />brovvn (lOYR 5/3) yvhen moist; massive; hard, friable;
<br />slightly sticky and slightly plastic; calcareous; small
<br />soft masses of lime; moderately alkaline; clear, gradual
<br />boundary.
<br />C2-23 to 60 inches, pale-brovvn (lOYR 6/3) loam, brown
<br />(lOYR 5/3) when moist; massive; slightly hard, fri-
<br />able; nonsticky and slightly plastic; calcareous; mod-
<br />erately alkaline.
<br />The Al horizon is loam, fine sandy loam, or sandy loam
<br />3 to 6 inches thick. The B horizon is clay loam or sandy
<br />cla}• loam 5 to 12 inches thick. In places the louver part of
<br />the C horizon is sandy loam and is as much as 15 percent
<br />fine gravel.
<br />Sh~toneham loam. Tltis soil is mostly in the north-
<br />central part of the survey area. The areas are irregu-
<br />larly shaped and cover as much as 1,200 acres. This
<br />soil has the profile described as representative of the
<br />series, but in places the upper part of the subsoil has
<br />weaker structure and is calcareous.
<br />Included with this soil in mapping are areas of Kim
<br />soils, mostly on the perimetel• of the mapped areas,
<br />anti al•eas of Otero and Olne}• soils. These soils make tip
<br />about 20 percent of the acreage.
<br />Runoff is meditml, and the hazard of erosion is
<br />moderate.
<br />This soil is well suited to grazing. It has a high po-
<br />tential for wildlife use if the habitat can be improved.
<br />The native vegetation is mainly .blue grama, galleta,
<br />sand dropseed, and cactus. Capability unit VIe-1,
<br />ltonil•rigated; Loamy Plains range site.
<br />Stroupe Series
<br />The Stroupe series consists of moderately deep, well-
<br />drained soils. These soils formed on mesas and foot-
<br />hills in cla}-ey residuum weathered from sandstone.
<br />They are underlain by sandstone at a depth of 20 to
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