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ATTACHMENT 2 6-Bresaer sandy loam, 4 to A percent slopes. This deep, well drained sod formed in alluvium and residuum weathered from arkosic sandstone. It is on gently rolling uplands and aide slopes. Elevation ranges from about 5,300 to about 6,400 feet. Average annual precipitation ranges from about /4 to 17 inches, average annual air temperature is about 47 degrees F, and average frost- free period is about 135 days. Included with this soil in mapping are small arses of Bresser sandy loam, 0 to 4 percent slopes. Also included ere Ascalon sandy loam and Truckton sandy loam that have 4 to A percent slopes. Typically, the surface layer is grayish brown sandy loam about 7 inches thick. The subsoil is brown sandy clay loam to a depth o1 about 20 inches and pale brown sandy loam to a depth of about 29 inches. The substra- tum is very pale brown loamy sand to a depth of 60 inches. Permeability end available water capacity are rnoder- ete. Surlace runofl is medium, and the hazard of erosion Is moderate. A few gullies are in some places. Less than half of this soil is used for nonirrigated cropland. Wheat is the mein crop. The estimated yield for wheat is about 17 bushels per acre. Most of the remaining acreage is used for grazing. Some areas of this soil are used for homesites and other urban pur- poses. Conserving moisture and protecting the soil from ero- sion are the main concerns of management on nonirri- gated cropland. Summer fallow is necessary because of the absence o1 adequate precipitation. Stubble mulch tillage and incorporating crop residue in and on the sur- face are necessary to protect soil from erosion, improve soil filth, and conserve moisture. Chiseling breaks up tillage. pansand improves water infiltration in the subsoil. SVipcropping et right angles to the prevailing wind rs also .effective in protecting the soil from blowing (figs. t to a). Tillage operations need to be kept to a minimum. Rangeland vegetation is mainly blue grams. prairie 58ndreed, needleandthread, little bluestem, and srdeoats grams. When range condition deteriorates because of overgrazing or other uses, grasses, such as blue grams end native bluegrasses, and (orbs, such as hairy goldas• te(, Increase. Sleepygrass and annuals replaco these grasses iT the range becomes senously deteriorated. Seeding the range is recommended to revegetate de- pleted areas in order to protect the soil lrom wind and water erosion. Native grasses, such as big bluestem, little bluestem, sldeoats grams, and prairie sandreed, are recommended for range seeding. Tame grasses. such as crested wheatgra6s, Russian wildrye, pubescent wheat- , grass, or intermediate wheatgrass, may also be used. This soil is generally suited to windbreaks and environ- mental plantings. Wind erosion is the main limitation to the establishment of trees and shrubs. This hazard can be overcome by cultivating only in the tree row and leaving a strip of vegetative cover between the cows. Supplemental irrigation is generally necessary at the time of planting and during dry periods. Well suited trees that survive best aro Rocky Mountain juniper, eastern redce- dar, ponderosa pine, Siberian elm, Russian-olive, and hackberry. The best suited shrubs are skunkbush sumac. American plum, and Hansen rose. This soil is well suited for homesiles and other urban uses and has only minor limitations that can be easily overcome. Where lhrs soil is used for a sewage lagoon system, special sealing methods are needed to over- come the excessive seepage condition. This coil is in capability subclass IVs, nonirrigated. This soil is in HRL Class 1 for wind and Class 3 fcr water. There are. no hydric components in this soil unit. ,, ..