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<br />
<br />ATTACHMENT 2
<br />19-Ellicott loamy coarse sand, 0 to 4 percent
<br />slopes. This deep, somewhat excessively drained, nearly
<br />level to gently sloping soil is on terracas and flood
<br />ploins. It formed in noncalcareous arkosic sandy alluvium
<br />throughout most of the surrey area. Ela ration ranges
<br />from about 5,300 ?0 6,800 fact. Average annual precipi-
<br />tation ranges from 14 to 13 inches, and av=_rage annual
<br />air temparature is about 47 dagrees r.
<br />Included with this soil in mapping are small areas of
<br />Fluvaquants, nearly lavel; Haplustolls, loamy; Haplustolls,
<br />moderately coarse, nearly level; and rrrervash.
<br />Typically, the surface layer is light gray loamy coarse
<br />sand and gray loamy sand about 14 inches thick. The
<br />substratum is light brownish gray and light gray loamy
<br />sand and loamy coarse sand to a depth of 60 inches.
<br />Permeability is rapid, and. available water capacity is
<br />Icw. Surface runoff is slo~.v, and the hazard of arosion is
<br />high.
<br />This soil is used for grazing. It nos p^,r cotunNal for
<br />cropland, windbreaks and environmental plantings, and
<br />engineering uses.
<br />Rangeland vegetation consists of switchgrass, sand
<br />dropseed, sand reedgrass, and sand bluestem. Willows
<br />and cottonwood trees are common in lo~.v areas. This
<br />soil is subject to flooding and needs to maim=_in a dense
<br />cover of grass in order to be protected from wind and
<br />water erosion.
<br />Windbreaks and environmental plantings are difficult to
<br />establish on this soil. Wind erosion and !c•.v 3vailabla
<br />water capacity are the main limitations to. establishing
<br />frees and shrubs. Trees need to be planted in shallow
<br />furrows, and vegetative cover needs to be maintained
<br />behveen the rows. Supplemental irrigation is needed to
<br />insure survival. Well suited trees that survive best are
<br />Rocky tvlountain juniper, eastern redcedar, ponderosa
<br />pine, Russian-olive, and Siberian elm. Tha best sui?ad
<br />shrubs include skunkbush sumac.
<br />Potential for homesi;es and other urban uses is se-
<br />verely limited because of the flood hazard.
<br />This soil is in capability subclass Vllw, nonirrigated.
<br />THIS SOIL IS IN HEL CLASS 1 FOR 4lIND AND
<br />CLASS 3 FOR WATER. THE FLWAQUF~IT COI~ONEPPP
<br />OF THIS SOIL UNIT IS A HYDRIC SmIL.
<br />23-Haplustolls, loamy, nearly level. Those daep,
<br />well drained loamy soils are on stream terraces and fans
<br />along creek drainageways. They are throughout the
<br />survey area. Soma of the larger areas of those soils ara
<br />in the Kiowa, Commanche, East Bijou, West oijou, and
<br />Big Sandy Creeks. They formed in loamy textured allu-
<br />vium. In most areas they are noncalcareous.
<br />Included with these soils in mapping are small areas of
<br />Bresser sandy loam, 0 to 4 percent slopes; fvunn clay
<br />loam, 0 to 4 percent slopes; and Haplustolls, moderately
<br />coarse, nearly level.
<br />The soils in this map unit are dark and range from 10
<br />to 35 inches thick. Stratification is common in the sur-
<br />face layer and the underlying layers. Texture is variable
<br />but ranges from loam to clay Icam
<br />Permeability is moderate to modera?ely slow, and
<br />available water capacity is high. Surface runoff is slow,
<br />and the hazard of erosion is slight. This soil is subject to
<br />rare flooding.
<br />These soils are mainly used for grazing, but some
<br />areas are used for nonirrigated and sprinkler irrigated
<br />cropland. Alfalfa, small grains, forage sorghums, corn,
<br />and beans are grown on these soils (fig. 10).
<br />Conserving moisture and protecting the soil from ero-
<br />sion are the main concerns of management on nonirri-
<br />gated cropland. Summer fallow is necessary because of
<br />insufficient precipitation. Stubble mulch tillage and incor-
<br />porating crop residue in and on the surface are neces-
<br />sary to protect the soil from blowing, improve water infil-
<br />tration, improve soil filth, and conserve moisture. Tillage
<br />operations need to be kept to a minimum.
<br />Where these soils are sprinkler irrigated, incorporating
<br />crop residue into the soil and maintaining organic matter
<br />content increase water infiltration and improve soil filth.
<br />Applications of manure and commercial fertilizer that
<br />contain nitrogen and phosphorus are needed to maintain
<br />fertility.
<br />Rangeland vegetation is mainly blue grama, western
<br />wheatgrass, needlegrasses, prairie junegrass, and si-
<br />deoats grama. Potential production rangas from 2,000
<br />pounds in favorable years to 800 pounds in unfavorable
<br />years.
<br />These soils are well suited to windbreaks and environ-
<br />mental plantings. Summer fallow, a year prior to planting;
<br />supplemental irrigation during planting and early stages
<br />of growth; and continued cultivation for ~.veed control ara
<br />needed to insure the establishment and survival of plant-
<br />ings.
<br />Those soils are suited to openlar.d ~.vildlife, such as
<br />cottontail and mourning dove. In cropland areas, favora-
<br />ble habitat can be developed by establishing nesting and
<br />escape cover. Rangeland wildlife, such as antelope and
<br />deer, can be increased by establishing good livestock
<br />water developments. Trees and shrubs along drain-
<br />ageways offer shelter and feed to wildlife.
<br />The rna:n limitation to use of thesa soils as homesites
<br />and other urban uses is the flooding hazard. Levees,
<br />dikes, ar.d dlv=_rsions can be used :o help offset this
<br />limitation.
<br />Th.esa accts ara in capability subclass I!;r, riraLd anc
<br />I!P;r. r•cnirrigated.
<br />TFI!:SE S(1ILS ARF, IN HEL CLASS 1 C'OR WIND A*?D
<br />CLP.SS ~ F(1R t~IATFR. THrR!? ARF NO HYDRIC
<br />CCt~(11•IF.NTS IN THIS SAIL.
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