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ATTACHMENT 2
<br />19-Ellicott loamy coarse sand, 0 to 4 percent
<br />slopes. This deep, somewhat excessively drarned, nearly
<br />level to gently sloping soil Is on terraces and flood
<br />ploins. II formed in noncalcareous arkosic sandy alluvium
<br />throughout most of the surrzy area. Ele.aticn ranges
<br />from about 5,300 !0 0,800 feat. Average annual precipi-
<br />tation ranges from t4 to t3 inches, and a~;3ra;e annual
<br />air temperature is abort 47 degrees r.
<br />Included •,vith this scil in mapping are small areas et
<br />Fluvaquents, nearly lava!; Haplustous. ;vary; F zplustolls,
<br />moderately coarse, nearly level; ar,d rivzr.vash.
<br />Typically, the surface layer is light gray loamy coarse
<br />sand and gray loamy sand about 11 inches thick. The
<br />substratum is light brownish gray and light gray loamy
<br />=_and and loamy coarse sand to a depth of 60 inches.
<br />Permeability is rapid, and available water capacity is
<br />Iew, Surface runoff is slow, and the hazard of erosion is
<br />high.
<br />This scil is used for grazing. It has F^ ~f CQ;9n!'al 'nr
<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 />sort is subject to flooding and needs to rnainta[n a dense
<br />cover of grass in order to be protected from wind and
<br />water erosion.
<br />Windbreaks and environmental plantings era difficult to
<br />establish on this sod. Wind aresion and !c•.v 3vaaabia
<br />water capacity are the main limitaticns to. establishing
<br />frees and shrubs. Trees need to be planted in shallow
<br />furrows, and vegetative cover needs to be maintained
<br />between the rows. Supplemental irrigation is needed to
<br />insure survival, Well suited trees that survive best are
<br />Rocky Mountain juniper, eastern redcedar, ponderosa
<br />pine, Russian-o!h:e, and Siterian elm, Tha test SUi!ed
<br />shrubs include skunkbush sumac.
<br />Potential for homesites and other urban uses is se-
<br />verely limited because of the flood hazard.
<br />This soil is in capabitiry subclass Vllw, norirr!gated.
<br />THIS SOIL IS IN HEL CLASS 1 FOH 4JIND AND
<br />CLASS 3 FOR WATER, THE FLQYAQIIF3'IT COMP021ENT
<br />OF THIS SOIL IINIT IS A HYDRIC SAIL,
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<br />23-Haplustolls, loamy, nearly level. These deep,
<br />well drained loamy soils are on stream terraces and fans
<br />along creek drainageways They are throughout the
<br />survey area. Some of the larger areas of thane soils are
<br />in the Kiowa, Commanche. East Bijou, West oij~u, and
<br />6.g Sar.dy Creeks. They formed in loamy textured a!!u-
<br />vium. In most areas they are noncalcareous.
<br />Included with these soils in mapping are small areas of
<br />Brenner sandy loam, 0 to 4 percent slopes; Nunn clay
<br />foam, 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 rn 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 slew, 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 nonirrigaled and sprinkler irrigated
<br />cropland. Alfalfa, small grains, forage sorghums, corn,
<br />and beans are grown on these soils (fig. 1Q).
<br />Conserving moisture and protecting the soil from ero-
<br />sion are the m2;n 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 fifth.
<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 grams, western
<br />wheatgrass, needlegrasses, prairie junegrass, and si-
<br />deoats grams. Potential production ranges from 2,000
<br />pounds in favoratte years to 600 pounds in unfavorable
<br />years.
<br />These soils are wall suited to windbreaks and environ-
<br />mental plantings. Summer tallow, a year prior to plantrng;
<br />supplemental irrigation during planting and early stages
<br />Of grGMh; and continued cultivation for weed control ara
<br />needed to insure the establishment and survival of plant-
<br />ings.
<br />These soils are suited to openlard wildlife, such as
<br />cottontail and mourning dove. In cropland areas, favora-
<br />ble haoitat 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 teed to wildlife.
<br />The rnain limitation to use of these snits as homesrtes
<br />and other urban uses is the flooding hazard. Levees.
<br />dikes, and diversions can be used To h?!p offset thi
<br />limi±a!i0n.
<br />Th C32 ~Gil$ ara ~n C3pabillty SUbCtaSS 11'.v, '~frigaDd 3n
<br />TfI~SI; SAILS AAE Itd HrL CLA55 7 FOR YdIHD Ar
<br />CLASS 3 FAR 4IATF.R. TH~R?? ARF 1.10 HYnRIC
<br />CC1M°~NRPITS IF] THIS S(IIL.
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