|
12 SOIL SURVEY
<br />when moist; single grained; loose; nonsticky and non-
<br />plastic; 15 percent gravel; calcareous; moderately akla-
<br />line.
<br />The A horizon is sandy loam to sand 3 to 7 inches thick.
<br />The C horizon is variable in texture because of stratifica-
<br />tion, but it is mostly sand and loamy sand.
<br />Bk-Bankard sand. This soil is along the major
<br />streams. The areas are elongated and cover as much as
<br />100 acres.
<br />Included with this soil in mapping are areas of Glen-
<br />berg and Las Animas soils that make up about 10
<br />percent of the acreage.
<br />Runoff is slow, and the hazard of soil blowing is
<br />high. The soil is subject to frequent, brief flooding.
<br />This soil has potential for wildlife use if the habitat
<br />can be improved. The native vegetation is wheatgrass,
<br />saltgrass, cottonwood, and willow. Capability unit
<br />VIw-2, nonirrigated; range site not assigned.
<br />Bloom Series
<br />The Bloom series consists of deep, somewhat poorly
<br />drained soils. These soils formed on flood plains in
<br />loamy alluvium. The slope is 0 to 2 percent, and ele-
<br />vation is 4,300 to 4,800 feet. The average annual pre-
<br />cipitation is 12 itlches. The average annual tempera-
<br />ture is 53° F, and the frost-free season is 155 to 165
<br />days. The native vegetation is mainly salt-tolerant
<br />grasses.
<br />In a representative profile the surface layer is light
<br />brownish-gray silt loam about 8 inches thick and
<br />light-gray silty clay loam about 6 inches thick. The
<br />underlying matel•ial is light-gray silty clay loam about
<br />21 inches thick. Below that it is light-gray and gray
<br />stratified silty clay loam and loamy very fine sand that
<br />extend to a depth of 60 inches or more.
<br />Permeability is moderate, and the available water
<br />capacity is high. These soils are moderately alkaline.
<br />Their root zone extends to a depth of 60 inches or
<br />mole. They are used for pasture and farming.
<br />Representative profile of Bloom silt loam, in native
<br />grass, 0.4 mile south and 200 feet west of the north-
<br />east corner of sec. 5, T. 21 S., R. 62 W.
<br />Al-0 to 8 inches, light brownish-gray (lOYR 6/2) silt loam,
<br />dark grayish brown (lOYR 4/2) and has few, fine, faint,
<br />yellowish-brown (lOYR 5/4) mottles when moist; weak,
<br />thin, platy structure; hard, friable; slightly sticky and
<br />slightly plastic; many fine and very,fine roots; calcare-
<br />ous; moderately alkaline; clear, smooth boundary.
<br />A3g-S to 14 inches, light-gray (lOYR 7/2) silty clay loam,
<br />dark grayish brown (lOYR 4/2) and has few, fine, faint,
<br />yellowish-brown (lOYR 5/4) mottles when moist; weak,
<br />thick, platy structure; hard, firm; slightly sticky and
<br />slightly plastic; common fine and very fine roots; cal-
<br />careous; moderately alkaline; abrupt, smooth boundary.
<br />Clg-14 to 35 inches, light-gray (IOYR 7/2) silty clay loam,
<br />dark gray (lOYR 4/2) and has common, fine, faint,
<br />strong-brown (7.5YR 5/6) mottles when moist; weak,
<br />medium, angular blocky structure; hard, firm; slightly
<br />sticky and plastic; common fine and very fine roots;
<br />calcareous; moderately alkaline; clear, smooth boundary.
<br />C2g-35 to 60 inches, light-gray and gray (lOYR 7/2, 6/1)
<br />silty clay loam and thin seams of loamy very fine sand;
<br />dark greenish-gray (SGY 4/1) mottles and few, medium,
<br />strong-brown (7.5YR 5/6) mottles when moist; massive;
<br />hard, firm; nonsticky to slightly sticky; fevv very fine
<br />roots; calcareous; moderately alkaline.
<br />The A and B horizons range from lOYR to 2.5Y in hue.
<br />The Al horizon is variable in texture, but it is mostly silt
<br />loam or loam. The A3g and Clg horizons are mostly silty
<br />clay loam. The C horizon is silty clay loam stratified with
<br />thin seams of loamy very fine sand. It ranges from dark
<br />grayish brown, in hue of 2.5Y and lOYR, to greenish gray
<br />and bluish gray, in hue of 5GY and 5B. In places the Cg
<br />horizon is underlain by wet sand or fine gravel at a depth
<br />of 40 inches or more.
<br />Bm-Bloom silt loam. This sail is along the major
<br />drainageways. The areas are elongated and cover as
<br />much as 400 acres.
<br />Included with this soil in mapping are areas of Api-
<br />sllapa silty clay that make up about 10 percent of the
<br />acreage. Also included are small areas of soils that are
<br />similar to the Bloom soils but are poorly drained.
<br />Runoff is slow, and the hazard of erosion is moder-
<br />ate. The soil is subject to occasional, brief flooding. The
<br />seasonal high water table is at a depth of 1.5 to 3 feet.
<br />There is a moderate to high concentration of salts, and
<br />salts tend to accumulate on the surface in areas where
<br />the capillary moisture from the ground water reaches
<br />the soil surface.
<br />This soil has a high potential for pasture. The native
<br />grasses are mainly alkali sacaton and inland saltgrass.
<br />Willow and tamarisk grow in places. Capability units
<br />IIIw-1, irrigated, and VIw-1, nonirrigated; Salt Mea-
<br />dow range site.
<br />Cascajo Series
<br />The Cascajo series consists of deep, excessively
<br />drained soils. These soils formed on terraces in gra-
<br />velly sandy alluvium. The slope is 5 to 25 percent, and
<br />elevation is 4,400 to 6,000 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. 2) the surface layer
<br />is light-brown very gravelly sandy loam about 10
<br />inches thick. The next layer is very pale brown very
<br />gravelly sandy loam about 11 inches thick. And belo'.v
<br />that is very pale brown stratified grave] and sand that
<br />extends to a depth of 60 inches or more.
<br />Permeability is rapid, and the available water
<br />capacity is ]o~v. These soils are mildly alkaline to
<br />moderately alkaline. Their root zone extends to a depth
<br />of 60 inches or more. These soils are a source of gravel
<br />for commercial use.
<br />Representative profile of Cascajo very gravelly
<br />sandy loam, 5 to 25 percent slopes, in native grass,
<br />0.33 mile north of the south quarter corner of sec. 15,
<br />T. 21 S., R. 64 W.
<br />Al-0 to 6 inches, light-brown (7.5YR 6/4) very gravelly
<br />sandy loam, dark brown (7.5YR 4/3) when moist; mod-
<br />erate, medium, granular structure; slightly hard, very
<br />friable; nonsticky and nonplastic; 00 percent gravel and
<br />cobbles; calcareous; moderately alkaline; clear, wavy
<br />boundary.
<br />AC-0 to 10 inches, light-brown (7.5YR 6/4) very gravelly
<br />sandy loam, dark brown (7.5YR 4/3) when moist; weak,
<br />medium, subangular blocky structure; hard, very friable;
<br />nonplastic; 60 percent gravel and cobbles; calcareous;
<br />moderately alkaline; clear, irregular boundary.
<br />Clca-10 to 21 inches, very pale brown (lOYR 8/3) very
<br />gravelly sandy loam, pale brown (lOYR 6l3) when
<br />moist; single grained; hard, loose; nonsticky and non-
<br />plastic; 50 percent gravel, 20 percent cobbles; calcareous;
<br />B-3
<br />
|