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<br />1$ I SOIL SURVEY
<br />ately alkaline, and the underlying material is strongly
<br />alkaline. The boot zone extends to a depth of more than
<br />60 inches. Tliese soils are used for grazing.
<br />Representative profile of Keyner• loamy sand, ill an
<br />area of Arvada-Keyner association, in native grass, 500
<br />feet west alld 500 feet North of the southeast col•ller of
<br />sec. 26, T. 19~ S., R. 62 W.
<br />A2-0 to 5 inches, light brownish-gray (lOYR 6/2) loamy
<br />fine sand, dark grayish brown (lOYR 4/2) when moist;
<br />single grained; loose; nonsticky and nonplastic; moder-
<br />ately alkaline; abrupt, smooth boundary.
<br />B21t-5 to 9 inches, pale-brown (SOYR 6/3) sandy clay
<br />loam, dark brown (lOYR 4/3) when moist; moderate,
<br />medium, columnar structure; very hard, friable; slightly
<br />sticky end plastic; thin, nearly continuous, clay films on
<br />peds; calcareous; moderately alkaline; clear, smooth
<br />boundary.
<br />B22t-9 to 15 inches, pale-brown (lOYR 6/3) sandy clay
<br />loam, brown (lOYR 5/3) when moist; moderate, medi-
<br />um, prismatic structure; very hard, friable; slightly
<br />sticky 'and plastic; thin, patchy, clay films on peds;
<br />calcareous; strongly alkaline; clear, smooth boundary.
<br />Clca-15 to 19 inches, very pale brown (IOYR 7/3) sandy
<br />clay loam, brown (lOYR 5/3) when rtioist; moderate,
<br />medium, prismatic structure; very hard, friable; slightly
<br />sticky i and plastic; calcareous; common, large, soft
<br />masses of bme; strongly alkaline; gradual, wavy
<br />boundary.
<br />C2ca-19 to 24 inches, light brownish-gray (2.SY 6/2) heavy
<br />clay loam, dark grayish brown (2.5Y 4/2) and has
<br />common, medium, strong-brown (7.5YR 5/6) mottles
<br />when moist; weak, medium, subangular blocky struc-
<br />ture; fiery hard, firm; sticky and very plastic; common,
<br />large, soft masses of lime; strongly alkaline; gradual,
<br />wavy boundary.
<br />C3-24 to A4 inches, light-gra}• (2.5Y 7/2) sandy loam,
<br />grayish brown (2.5Y 5/2) and has common, ~ small,
<br />strong-brown (7.SY 5/6) mottles when moist; weak,
<br />mediu`n, subangular blocky structure; slightly hard,
<br />very friable; nonsticky and slightly plastic; calcareous;
<br />strongly alkaline; gradual, wavy boundary.
<br />C4-44 to 60 inches, very pale brown (lOYR 7/3) sandy
<br />loam, brown (lOYR 5/3) and has a few, small, strong-
<br />brown '(7.5Y 5/6) mottles when moist; single grained;
<br />slightly hard, very friable; nonsticky and slightly plas-
<br />tic; calcareous; strongly alkaline.
<br />The A horizon is sandy loam to loamy sand as much as
<br />9 inches thick. The B2t horizon is sandy clay loam to clay
<br />loam 7 to 15 inches thick. The B21t horizon ranges from
<br />moderately alkaline to strongly alkaline. The C horizon is
<br />stratified and in places has layers of sand. In places there
<br />is a Cg horizon between depths of 30 and 40 inches.
<br />Ke-Keynes loamy sand, wet. This soil is mostly on
<br />the flood plains of Chico Creek in the northeastern part
<br />of Pueblo County. Tfle at•eas are rectangulal• in shape
<br />and covel• as much as 1,000 acres. This soil has a profile
<br />similar to the one described as representative of the
<br />series, but the subsoil is thicker and the substratum is
<br />stratified sandy loam and gl•avelly sand. Also, erosion
<br />has removed the surface layer on about 5 percent of the
<br />acreage, leaving barren slickspots.
<br />Included ~a~ith this soil in mapping are areas of a
<br />pom•ly drained clayey soil in narrow, winding swales
<br />whel•e the µ~atel• table is at a depth of 18 inches. Also
<br />included are areas of Glenberg and Havel•son soils near
<br />drainageways and areas of Limon soils on ]ow benches.
<br />These included soils make up about 25 percent of the
<br />acreage.
<br />Runoff is slow, and the hazard of erosion is moder-
<br />ate. The soil is subject to occasional, brief flooding.
<br />The water table is at a depth of 2 to 4 feet. There is a
<br />moderate to ]iigh concentration of salts in the soil.
<br />This soil has potential for waterfowl use if the habi-
<br />tat can be improved. The native vegetation is mainly
<br />alkali sacaton,inland saltgrass, greasewood, fourwing
<br />saltbush, and cactus. Capability unit. VIw-1; Salt
<br />Meadow range site..
<br />Kim Series
<br />The Kim sel•ies consists of deep, well-dlailled soils.
<br />These soils formed on alluvial fans in loamy alluvium.
<br />The slope is 0 to 5 percent, and elevation is 4,600 to
<br />5,000 feet. The average annual precipitation is 12
<br />inches. The average annual temperature is 53° F, and
<br />the frost-free season is 145 to 175 days. The native
<br />vegetation is mainly plains grasses.
<br />In a representative profile the surface layer is light
<br />bl•ownish-gray loam about 5 inches thick. The upper
<br />part of the underlying material is pale brown loam
<br />about 10 inches thick, the next part is vel•y pale blown
<br />silt loam 20 inches thick, and the lower part is very
<br />pale brown loam that extends to a depth of 60 inches
<br />or more.
<br />Pel•meability is moderate, and the available water
<br />capacity is high. These soils are moderately alkaline.
<br />Their 1•oot zone extends to a depth of 40 to 60 inches
<br />or more. They are used fol• gl•azillg.
<br />Representative profile of Kim loam, ill an al•ea of
<br />Wiley-Kim looms, in grass, 0.35 mile not•th and 0.35
<br />mile east of the southwest corner of sec. 21, T. 26 S.,
<br />R. 60 W.
<br />Al-0 to 5 inches, light brownish-gray (lOYR 6/2) loam,
<br />dark grayish brown (lOYR 4/2) when moist; week,
<br />medium, platy structure parting to moderate, fine
<br />granular; slightly hard, very friable; nonsticky and
<br />slightly plastic; calcareous; moderately alkaline; abrupt,
<br />smooth boundary.
<br />AC-5 to 15 inches, pale-brown (lOYR 6/3) loam, brown
<br />(lOYR 5/3) when moist; weak, medium, prismatic struc-
<br />ture parting to moderate, fine, subangular blocky;
<br />slightly hard, very friable; nonsticky and slightly plas-
<br />tic; calcareous; moderately alkaline; clear, wavy bound-
<br />ary.
<br />Clca-15 to 35 inches, very pale brown (lOYR 7/3) silt
<br />loam, brown (lOYR 5/3) when moist; weak, medium,
<br />prismatic structure parting to moderate, fine, angular
<br />blocky; hard, very friable; nonsticky and slightly plas-
<br />tic; calcareous; fine, generally rounded, soft masses of
<br />lime; moderately alkaline; gradual, smooth boundary.
<br />C2-35 to 52 inches, very pale brown (lOYR 8/4) loam,
<br />yellowish brown (lOYR 6/4) when moist; weak, fine,
<br />subangular blocky structure; slightly hard, very friable;
<br />nonsticky and slightly plastic; calcareous; moderately
<br />alkaline; clear, wavy boundary.
<br />C3cs-52 to 60 inches, very pale brown (lOYR 8/4) loam,
<br />light yellowish brown (lOYR 6/4) when moist; massive;
<br />slightly hard, very friable; nonsticky and slightly plas-
<br />tic; calcareous; scattered, fine crystalline gypsum; mod-
<br />erately alkaline.
<br />The A horizon is loam to sandy loam 3 to 6 inches thick.
<br />Coarse fragments make up as much as 15 percent of the
<br />soil, and they are commonly small sandstone fragments. The
<br />AC horizon is loam to sandy loam 6 to 10 inches thick. The
<br />C horizon ranges from loam to silt loam but is generally
<br />loam. Depth to sandstone ranges from 40 inches to several
<br />feet. In places calcareous cobbly gravel is below a depth
<br />of 40 inches.
<br />Kim soils in the Pueblo Area are mapped mostly with
<br />Wile}- soils.
<br />Km-Kim fine sandy loam. This nearly level soil is
<br />on terraces along the south side of the Arkansas River.
<br />B-4
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