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LOGAN COUNTY, COLORADO
<br />water and control of soil loss. Short irrigation rune and
<br />frequent light irrigations are needed because of the slow
<br />permeability. Incerporating crop residues increases infil-
<br />tration, reduces soil loss and improves soil filth. Applica-
<br />tions of manure and commercial fertlizers containing
<br />nitrogen and phosphorus are important in maintaining soil
<br />productivity.
<br />In nonirrigated cropland aeeas the primary objectives
<br />of management aze conserving moisture and protecting
<br />soil from erosion. Management practices such as stubble
<br />mulch tillage and incorporating crop residues are essential
<br />to protect soil from erosion, improve water infiltration,
<br />improve soil filth, and conserve moisture. Chiseling or
<br />subsoding breaks up tillage pans and improves water in-
<br />filtration, Tillage should be kept to a minimum. Terracing
<br />is also beneficial in reducing runoff and conserving
<br />moisture in areas with slopes over 1 percent.
<br />Rangeland vegetation of this soil consists mainly of
<br />blue grams, buffalograss, western wheatgrass, and sedge.
<br />Proper grazing use and planned grazing systems are the
<br />most important practices needed to maintain quantity and
<br />quality of desirable vegetation on rangeland. Range seed-
<br />ing will speed the revegetation of areas depleted by
<br />heavy grazing, cultivation or other disturbances. Com-
<br />binations of stockwater development, fencing and
<br />deferred grazing help improve grazing distribution and
<br />maintain range condition. Contour furrowing and pitting
<br />are practices that improve water infiltration and reduce
<br />runoff and are especially effective on rangeland areas in
<br />poor and fair condition.
<br />Windbreaks and environmental plantings are generally
<br />well suited on this so>7. Special care consisting of summer
<br />fallow a year prior to planting, supplemental water during
<br />planting and early stages of growth, and continued cul-
<br />tivation for weed control is needed to insure establish-
<br />ment and survival of plantings. Trees best suited and
<br />having beat survival are Rocky Mountain juniper, eastern
<br />reacedaz, ponderosa pine, S~berian elm, Russian-olive and
<br />hackberry. Shrubs best suited are skunkbuah sumac, hlac,
<br />Siberian peashrub and American plum.
<br />Openland w>7dlife such as pheasant, cottontail rabbit
<br />and mourning dove are suited to this soil In cropland
<br />areas favorable habitat can be developed by establishing
<br />wildlife areas for nesting and escape cover. For
<br />pheasants, undisturbed nesting cover is vital and should
<br />be included in plena for habitat development, Tree and
<br />shrub pbmtings along fence lines, irrigation ditches, mad-
<br />aidea and streambanks also help encourage wildlife. Ran-
<br />geland wildlife, including antelope and jackrabbits, can be
<br />encouraged on grasslands by livestock grazing manage-
<br />ment, livestock water developments, and types of fencing
<br />to permit unrestricted antelope movement,
<br />Where the so>7 is used for homesites and other urban
<br />developments, the primary limiting soil features are slow
<br />permeab>ity, high shrink-swell, and seepage. Septic tank
<br />filter fields must be placed in the underlying coarse sand
<br />and gravel if they are to function properly. Lagoons may
<br />not function properly because of seepage. Compensating
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<br />design measures such as footing placement within the
<br />coarse sand and gravel or backfi[ling with better soil
<br />material are needed to overcome the shrink-swell condi-
<br />tion for budding sites and roads. Capability subclass IIIs
<br />nonirrigated, IIIe irrigated.
<br />21-Dailey loamy sand, 0 to 3 percent slopes. This is
<br />a deep, somewhat excessively drained sail in upland val-
<br />leys. It formed in noncalcareous, eolian sandy material
<br />and is extensive in the sandhill azea that parallels the
<br />South Platte River on the south aide. The average annual
<br />precipitation ranges from 15 to 19 inches. Slopes are
<br />nearly level to gently sloping.
<br />Included in this mapping unit are small areas of Ju-
<br />lesburg loamy sand in depression areas.
<br />Typically the surface layer is grayish brown loamy sand
<br />about 16 inches thick. The underlying layer is pale brown
<br />loamy sand that extends to 60 inches or more.
<br />Permeability is rapid. Effective rooting depth is 60
<br />inches or more. Available water capacity is low. Surface
<br />runoff is slow, the water erosion hazard is slight, and the
<br />soil blowing hazard is moderate.
<br />This soil is used mainly for sprinkler irrigated cropland.
<br />Corn, sugar beets, and alfalfa are the main gimps grown.
<br />Some small areas are used for grazing. This soil is not
<br />suited for nonirrigated cropland because of its low availa-
<br />ble water capacity. Areas being cultivated now are best
<br />seeded to grass.
<br />In irrigated cropland areas the main concerns of
<br />management are soil blowing, maintenance of organic
<br />matter and fertility. This so>7 is best suited to the sprin-
<br />kler irrigation method because of rapid permeab~7ity.
<br />Most of the pivotal sprinklers are located in areas of this
<br />so>ti Special care consisting of cover crops grown after
<br />harvesting mw crops and incorporating crop residues dur-
<br />ing periods when no growing crop is present to protect
<br />the soil is needed. Applications of manure and use of crop
<br />residues help maintain and improve sod filth and organic
<br />matter content. Applications of mmmemial fertilizers con-
<br />taining nitrogen and phosphorus are required for high
<br />yield of all crops.
<br />Rangeland vegetation of this so>1 consists mainly of
<br />sand blueatem, switchgrass, sand reedgrass, little
<br />bluestem, needleandthread, sideoats grams, sand drop-
<br />seed, and blue grams These grasses furnish most of the
<br />forage. Sand sagebrush is scattered in the vegetation.
<br />Grazing management must be aimed at the maintenance
<br />or improvement of range condition through proper graz-
<br />ing use. Without management of grazing, the plant cover
<br />loses the tall productive grasses. Deferred grazing is
<br />highly effective. Brush management is needed in areas
<br />where sand sagebrush forma a dense stand because of
<br />continued heavy grazing use. Range seeding is essential if
<br />severely depleted areas develop. Fencing and livestock
<br />watering places aid in obtaining more uniform distribu-
<br />tion of grazing. Care must be taken not to locate livestock
<br />water developments in places where serious wind erosion
<br />can result.
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