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This soil is used almost entirely for imgated crops. It is suited to all crops commonly <br />grown in the area, including corn, sugar beets, beans, alfalfa, small grain, potatoes, and <br />onions. An example of a suitable cropping system is 3 to 4 years of alfalfa followed by <br />com, corn for silage, sugar beets, small grain, or beans. Few conservation practices are <br />needed to maintain top yields. <br />All methods of irrigation are suitable, but furrow imgation is the most common. Barnyard <br />manure and commercial fertilizer are needed for top yields. <br />Windbreaks and environmental plantings of trees and shrubs commonly grown in the area <br />are generally well suited to this soil. Cultivation to control competing vegetation should be <br />continued for as many years as possible following planting. Trees that are best suited and <br />have good survival are Rocky Mountain juniper, eastern red cedaz, ponderosa pine, <br />Siberian elm, Russian-olive, and hackberry. The shrubs best suited are skunkbush, lilac, <br />Siberian peashrub, and American plum. <br />Wildlife is an important secondary used of this soil. The cropland areas provide favorable <br />habitat forring-necked pheasant and mourning dove. Many nongame species can be attracted <br />by establishing-areas for nesting and escape cover. For pheasants undisturbed nesting cover <br />is essential and should be included in plans for habitat development, especially in areas of <br />intensive agriculture. <br />This soil has fair to poor potential for urban development. It has moderate to high shrink <br />swell, low strength, and moderately slow permeability. These features create problems in <br />dwelling and road construction. Those areas that have loam or sandy loam in the lower part <br />of the substratum are suitable for septic tank absorption fields and foundations. Some azeas <br />aze adjacent to streams and are subject to occasional flooding. This soil has fair potential <br />for such recreational development as camp and picnic area and playgrounds. Capability <br />class I irrigated. <br />41-Nunn Clay Loam, 0-1 % slopes <br />This is a deep, well-drained soil on terraces and smooth plains at elevations of 4550 to <br />5150 feet. It formed in mixed alluvium and eolian deposits. Included in mapping are small, <br />long and narrow azeas of sand and gravel deposits and small areas of soils that are subject <br />to occasional flooding. Some small, leveled areas are also included. <br />Typically, the surface layer of this Nunn soil is grayish brown clay loam about 9 inches <br />thick. The subsoil is light brownish gray clay loam about 14 inches thick. The upper part of <br />the substratum is clay loam. The lower part to a depth of 60 inches is sandy loam. <br />Permeability is moderately slow. Available water capacity is high. The effective rooting <br />depth is 60 inches or more. Surface runoff is slow, and the erosion hazazd is low. <br />DMC !12 Permi( <br />Page 46 oj8l <br />