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14 SOIL SURVEY
<br /> ing corn, sugar beets. beans. alfalfa. small grain. The potential native vegetation is dominated by blue
<br /> potatotes, and onions. An example of a suitable cropping grams. Several mid grasses, such as western wheatgrass
<br /> system is 3 to 4 years of alfalfa followed by corn. corn for and needleandthread, are also present. Potential produc-
<br /> silage, sugar beets, small grain, or beans. Few conserva- tion ranges from 1,600 pounds per acre in favorable years
<br /> tion practices are needed to maintain top yields. to 1,000 pounds in unfavorable years. As range condition
<br /> All methods of irrigation are suitable, but furrow ir- deteriorates, the mid grasses decrease; blue grama, buf-
<br /> rigadon is the most common. Barnyard manure and com- falograss, snakeweed, yucca, and fringed sage increase;
<br /> mercial fertilizer are needed for top yields. and forage production drops. Undesirable weeds and an-
<br /> Windbreaks and environmental plantings of trees and nuals invade the site as range condition becomes poorer-
<br /> shrubs commonly grown in the area are generally well Management of vegetation on this soil should be based
<br /> suited to this soil. Cultivation to control competing on taking half and leaving half of the total annual produc-
<br /> vegetation should be continued for as many years as Lion. Seeding is desirable if the range is in poor condition.
<br /> possible following planting. Trees that are best suited and Sideoats grama, little bluestem, western wheatgrass, blue
<br /> have wood survival are Rocky Mountain juniper, eastern grama, pubescent wheatgrass, and crested wheatgrass are
<br /> redcedar, ponderosa pine. Siberian elm, Russian-olive, and suitable for seeding. The grass selected should meet the
<br /> hackberry. The shrubs best suited are skunkbush sumac. seasonal requirements of livestock. It can be seeded into
<br /> lilac. Siberian peashrub, and American plum. a clean, firm sorghum stubble or it can be drilled into a
<br /> Openland wildlife, such as pheasant, mourning dove, firm prepared seedbed. Seeding early in spring has
<br /> and coctontail, are best suited to this soil. Wildlife habitat proven most successful.
<br /> development, including tree and shrub plantings and Windbreaks and environmental plantings of trees and
<br /> grass plantings to serve as nesting areas, should be suc- shrubs commonly grown in the area are generally well
<br /> cessful without irrigation during most years. Under ir- suited to this ,soil. Cultivation to control competing
<br /> d. wildliferigation, good habitat can be established, benefit- vegetation should be continued for as many years as
<br /> ing many kinds of openland wildlife- possible following planting. Trees that are best suited and
<br /> This soil has good potential for urban and recreational have good survival are Rocky Mountain juniper, eastern
<br /> developments. Road design can be modified to compen- redcedar. ponderosa pine, Siberian elm, Russian-olive, and
<br /> sate for the limited capacity of this soil to support a load. hackberry. The shrubs best suited are skunkbush sumac,
<br /> Capability class I irrigated. lilac. Siberian peashrub, and American plum.
<br /> 15—Colby loam, 1 to 3 percent slopes. Openland wildlife, such as pheasant. mourning dove.
<br /> pes. This is a deep, and cottontail. and rangeland wildlife, such as antelope,
<br /> well drained soil on uplands at elevations of 4.550 to 5,050 cottontail, and topple, are best ;aired [o this soil. Under
<br /> feet. It formed in calcareous eolian deposits.
<br /> Typically the surface layer is pale brown loam about 12 irrigation. good 'wildlife habitat can be established,
<br /> inches thick. The underlying material is very pale brown benefiting many kinds of openland wildlife. Forage
<br /> production is typically low on rangeland, and grazing
<br /> silt loam to a depth of 60 inches.
<br /> Permeability is moderate. Available water capacity is management is tneeded if livestock and wildlife share the
<br /> high. The effective rooting depth is 60 inches or more. range. Livestock watering facilities also are utilized by
<br /> various wildlife species.
<br /> Surface runoff is medium, and the erosion hazard is This soil has good potential for urban and recreational
<br /> moderate. development. Road design can be modified to compensate
<br /> In irrigated areas this soil is suited to all crops com- for the limited capacity of this soil to support a load.
<br /> monly grown in the area, including corn, sugar beets, Capability subclass Ile irrigated, IVe nonirrigated;
<br /> beans, alfalfa, small grain, potatoes. and onions. An exam- Loamy Plains range site-
<br /> ple of a suitable cropping system is 3 to 4 years of alfalfa 16—Colby loam, 3.to 5 percent slopes. This is a deep,
<br /> followed by corn, corn for silage, sugar beets, small grain. well drained soil on upland hills and ridges at elevations
<br /> or beans. Land leveling, ditch lining, and installing of 4,550 to 5,050 feet. It formed in calcareous eolian
<br /> pipelines may be needed for proper water application. deposits. Included in mapping are small areas of soils that
<br /> All methods of irrigation are suitable, but furrow ir- have fine sandy loam or loam underlying material.
<br /> rigation is the most common. Barnyard manure and com- Typically the surface layer is pale brown loam about 10
<br /> merciai fertilizer are needed for top yields. inches thick. The underlying material is very y g pale brown
<br /> In nonirrigated areas this soil is suited to winter wheat, silt loam to a depth of 60 inches.
<br /> barley, and sorghum. Most of the acreage is planted to Permeability is moderate. Available water capacity is
<br /> winter wheat. The predicted average yield is 28 bushels high. The effective rooting depth is 60 inches or more.
<br /> per acre. 'ihe soil is summer £allowed in alternate years Surface runoff is medium to rapid, and the erosion hazard
<br /> to allow moisture accumulation. Generally precipitation is is moderate.
<br /> too low for beneficial use of fertilizer. In irrigated areas this soil is suited to crops commonly
<br /> Stubble muich farming, striperopping, and minimum til- grown in the area. Perennial grasses and alfalfa or ciose
<br /> lage are needed to control soil blowing and water erosion. ;rown crops should be grown at least O percent of the
<br /> Terracing may also be needed to control water erosion- -,.fine. 'contour ditches and corrugations can 6e used in ir-
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