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<br />000028
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<br />Apishapa Series
<br />
<br />The Apishapa series consists of deep, somewhat
<br />poorly drained soils. These soils formed on flood
<br />plains in clayey alluvium. The slope is 0 to 2
<br />percent, and elevation is 4,300 to 4,800 feet. The
<br />average annual precipitation is 12 inches. The
<br />average annual temperature is about 53 OF, and the
<br />frost-free season is 145 to 175 days. The native
<br />. vegetation is mainly salt tolerant grasses.
<br />
<br />In a representative profile the surface layer is gray_
<br />ish-brown silty clay about 8 inches thick. The
<br />upperpart of the underlying material is grayish-
<br />brown silty clay about 5 inches thick, the next 16
<br />inches is grayish- brown clay, and the lower part is
<br />light brownish-gray clay that extends to a depth of
<br />60 inches or more.
<br />
<br />Permeability is slow, and the available water capac-
<br />ity is high. The surface and subsurface layers are
<br />moderately alkaline, and the underlying material is
<br />strongly alkaline. The root zone extends to a depth of
<br />60 inches or more. These soils are used for irrigated
<br />crops and hay and fur irrigated or nonirrigated
<br />pasture.
<br />
<br />Representative profile of Apishapa silty clay, in
<br />irrigated pasture, 0.44 mile south and 300 feet west
<br />of the northeast comer of see. 8. T. 21 S., R 61 W.
<br />
<br />AI-O to 8 inches, grayish-brown (IOYR 5/2) silty
<br />clay, dark grayish brown (lOYR 4/2) when
<br />moist; weak, coarse, granular structure; hard,
<br />firm; slightly sticky and plastic; calcareous;
<br />moderately alkaline; abrupt, smooth boundary.
<br />Clos--8 to 13 inches, grayish-brown (2.5Y 512) silty
<br />clay, dark grayish brown (2.5Y 4/2) moist; weak
<br />to moderate, fine, subangular blocky structure;
<br />hard, firm; slightly sticky and plastic; calcareous;
<br />few, fine, soft masses of crystalline gypsum;
<br />moderately alkaline;
<br />C2cacsg-13 to 29 inches, grayish-brown (2.5Y 5/2)
<br />clay, dark grayish brown (2.5Y 4/2) when moist;
<br />few, faint, gray (2.5Y 5/1) mottles; massive;
<br />hard, firm; sticky and very plastic; calcareous;
<br />moderately alkaline; gradual, smooth boundary.
<br />C3g-29 to 60 inches, light brownish-gray (2.5Y 6/2),
<br />dark grayish brown (2.5Y 4/2) when moist;
<br />common, fine, distinct, dark-gray (N 4/0)
<br />mottles; massive; hard) finn; sticky and very
<br />plastic; calcareous; strongly alkaline.
<br />
<br />Cracks as much as one-half inch wide form when the
<br />soil dries out. The A horizon is silty clay loam or
<br />silty clay 4 to 8 inches thick. The C horizon is clay
<br />
<br />or silty clay. In places it has thin strata of sand, and
<br />in places wet sand is below a depth of 31/2 feet.
<br />Gray mottles are at a depth of 12 to 20 inches.
<br />
<br />Ap-Apishapa silty clay. This soil is mainly on flood
<br />plains ofthe Arkansas River. The areas are
<br />irregularly shaped and cover as much as 600 acres.
<br />This soil has the profile described as representative
<br />of the series, hut in places 3 or 4 inches of fine sand
<br />is on the surfuce.
<br />
<br />Included with this soils in mapping are areas of
<br />Glenberg fine sandy loam and Haverson fine sandy
<br />loam. These areas make up less than 10 percent of
<br />the acreage.
<br />
<br />Runoffis slow, and the hazard of erosion is slight.
<br />In places the soil is subject to occasional, brief
<br />flooding. A seasonal high water table is at a depth
<br />of2 to 3 feet. Aeration is poor below a depth of2
<br />or 3 feet because of the high water table. A low to
<br />moderate concentration of salts tends to accumulate
<br />from irrigation water or from evaporation of
<br />upward-moving capillary water from the seasonal
<br />high water table.
<br />
<br />This soil is better suited to irrigated pasture than to
<br />other uses. The surface layer is difficult to cultivate
<br />because of the silty clay texture. The native grasses
<br />are alkali sacaton and inland saltgrass. Capability
<br />units IIIw-l, irrigated, and VIw-l, nonirrigated;
<br />Salt Meadow range site.
<br />
<br />Bloom Series
<br />
<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
<br />elevation is 4,300 to 4,800 feet. The average annual
<br />precipitation is 12 inches. The average annual
<br />temperature is 530 F, and the frost-free season is 155
<br />to 165 days. The native vegetation is mainly salt-
<br />tolerant grasses.
<br />
<br />In a representative profile the surmce 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 material is light-gray silty clay loam
<br />about 21 inches thick. Below that it is light-gray and
<br />gray stratified silty clay loam and loamy very fine
<br />sand that extend to a depth of 60 inches or more.
<br />
<br />Permeability is moderate, and the available water
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