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PUEBLO AREA. COLORADO
<br />moderate, medium, granular structure parting to mod-
<br />erate, very fine, granular; soft, very friable; slightly
<br />sticky and slightly plastic; moderately alkaline; clear,
<br />smooth boundary.
<br />B2t-5 to 13 inches, brown (lOYR 5/3) heavy silty clay
<br />loam, dark brown (lOYR 4/3) when moist; moderate,
<br />medium, subangular blocky structure parting to strong,
<br />very fine, subangular blocky; very hard, firm; sticky
<br />and plastic; continuous, clay films on peds; mildly alka-
<br />line; clear, smooth boundary.
<br />Baca-13 to 21 inches, pale-brown (lOYR 6/3) silty clay
<br />loam, dark brown (lOYR 4/3) when moist; moderate,
<br />fine, subangular blocky structure; very hard, friable;
<br />sticky and plastic; thin, continuous, clay films on peds;
<br />calcareous; common, soft, rounded masses of lime; mod-
<br />erately alkaline; clear, wavy boundary.
<br />Clca-21 to 3.1 inches, pale-brown (lOYR 6/3) silt loam,
<br />brown (30 YR 5/3) when moist; weak, coarse, sub-
<br />angular blocky structure; hard, very friable; slightly
<br />sticky and slightly plastic when wet; calcareous; com-
<br />mon, small, soft, rounded masses of lime and gypsum;
<br />moderately alkaline; clear, wavy boundary.
<br />C2-39 to 48 inches, pale-brown (lOYR 0/3) silt loam, brown
<br />(lOYR 5/3) when moist; massive; slightly hard, very
<br />friable; nonsticky and slightly plastic; calcareous; com-
<br />mon, small, rounded masses of crystalline gypsum;
<br />moderately alkaline; clear, wavy boundary.
<br />C3--48 to 60 inches, light yellowish-brown (lOYR 614) loam,
<br />yellowish brawn (lOYR 5/4) when moist; massive; soft,
<br />very friable; moist; nonsticky and slightly plastic; cal-
<br />careous; common, small, rounded masses of crystalline
<br />gypsum; moderately alkaline.
<br />The A and B horizons are 15 to 30 inches thick, end
<br />calcareous material is at a depth of 8 to 20 inches. The A
<br />horizon is silty clay loam or loam 3 to 5 inches thick. The
<br />B2t horizon is heavy silty clay loam or heavy clay loam 7 to
<br />15 inches thick. Common, fine, soft, rounded masses of lime
<br />and gypsum are below a depth of 13 inches. The lowermost
<br />part of the C horizon is generally yellowish brown. ilfarl is
<br />several feet below the surface.
<br />Bc-Baca silty clay loam. This soil is in the central
<br />and southeastern parts of the survey area. The slope
<br />is mostly 1 percent or less but ranges to 3 percent. The
<br />areas are irregularly shaped and cover as much as 200
<br />acres.
<br />Included with this soil in mapping are areas of
<br />Manvel soils that make up about 10 percent of the
<br />acreage.
<br />Runoff is slow, and the hazard of erosion is slight.
<br />Runoff from surrounding higher lying lands tends to
<br />accumulate in areas of this soil.
<br />This soil has a high potential for wildlife Ilse if the
<br />habitat can be improved. The native glasses are mainly
<br />blue grams, galleta, and buffalograss. Capability units
<br />I, irrigated, and IVe-1, nonirrigated; Loamy Plains
<br />range site.
<br />Bankard Series
<br />The Bankard series consists of deep, somewhat ex-
<br />cessively drained soils. These soils formed on flood
<br />plains in sandy alluvium. The slope is 0 to 2 percent,
<br />and elevation is 4,300 to 5,100 feet. The average annual
<br />precipitation is 12 inches. The average annual tem-
<br />peratul•e is 53° F, and the frost-free season is 145 to
<br />175 days. The native vegetation is mainly plains
<br />grasses.
<br />In a representative profile (fig. 1) the surface layer
<br />is pale-brown sand about 4 inches thick. The under-
<br />lying matel'ial is pale-brown stratified loamy sand,
<br />sand, and sandy loam about 26 inches thick over light
<br />11
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<br />Figure !. Profile of Bankard sand, showing stratification that is
<br />typical of soils that formed on flood plains. The strata range from
<br />sand to sandy loam.
<br />grayish-brown stratified sand, loamy sand, and sandy
<br />loam that extends to a depth of 60 inches or more.
<br />Permeability is rapid, and the available water
<br />capacity is low. These soils al•e moderately alkaline.
<br />Their root zone extends to a depth of more than 60
<br />inches. They are Used for grazing.
<br />Repl•esentative profile of Bankard sand, in native
<br />grass, 0.35 mile west and 0.45 mile south of the north-
<br />eastcorner of sec. 3, T. 22 5., R. 60 W.
<br />Al-0 to 4 inches, pale-brown (lOYR 6/3) sand, brown
<br />(lOYR 5/3) when moist: single grained; loose, very
<br />friable;.nonstick}• and nonplastic; calcareous; moderate-
<br />ly alkaline; clear, smooth boundary.
<br />Cl-4 to 30 inches, pale-brown (lOYR 6/3) loamy sand and
<br />thin strata, as mnAl as 3 inches thick, of sandy loam or
<br />sand, brown (lOYR 613) when moist; single grained;
<br />loose; nonsticky and nonplastic; 5 percent gravel; cal-
<br />careous; moderately alkaline; clear, smooth boundary.
<br />C2-30 to 00 inches, light grayish-brown (lOYR 6/2) to
<br />eery polo brown (IOYR Si3) stratified sand, loamy sand,
<br />and sandy loam, grayish brown (lOYR 512) and has
<br />common, small, yellowish-brown (lOYR 5/8) mottles
<br />B-2
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