2006-10-24_REVISION - M1992051 - Laserfiche WebLink

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105--Shanta foam, dry, 0 to 3 percent slopes. This deep, well drained soil is an stream terraces. It formed in alluvium. The native vegetation is mainly grasses. Elevation is 5,000 to 5,300 feet. The average annual precipitation is 11 or 12 inches, the average annual air temperature is 50 to 53 degrees F, and the average frost-free period is 140 to 165 days. The surface layer is typically grayish brown loam about 27 inches thick. The substratum to a depth of 60 inches or more is stratified sandy clay loam, loam, and silty clay loam. The soil is mildly alkaline to a depth of 48 inches and is moderately alkaline below that depth. Included with this soil in mapping are areas of poorly drained soils adjacent to stream channels. These soils have a surface layer of fine sandy loam. They make up about 10 percent of the unit. Also included are areas of well drained soils that generally have sandy loam in the upper 40 inches. These soils make up about 5 percent of the unit. Permeability is moderate in the Shanta soil. Available water capacity is high. Effective rooting depth is 60 inches or more. Runoff is slow, and the hazard of water erosion is slight. The soil is generally subject to rare, very brief periods of flooding from April through September. Some areas in the town of Florence are not subject to flooding because of the higher elevation or because of flood-protection measures. Most areas of this soil are used as irrigated cropland. A tew areas are used for urban development. Hay and pasture are the main irrigated crops. A few areas on the west side of Florence are used for vegetables or corn for silage. The potential plant community is mainly blue grama, western wheatgrass, little bluestem, and Indian ricegrass. The average annual production of aii-dry vegetation is about 1,400 pounds per acre. This soil is well suited to irrigated crops. Irrigation water can be applied by furrow, corrugation, sprinklers, or flooding from contour ditches. Adjusting the applications of water to the available water capacity, the water intake rate, and the needs of the crop helps to prevent overirrigating and the leaching of plant nutrients. In a few areas, the water table rises to a depth of about 20 to 30 inches for brief periods in early summer. The water table provides beneficial subirrigation for deep-rooted crops. Nonleguminous crops respond to applications of nitrogen and phosphorus, and leguminous crops respond to applications of phosphorus. Returning crop residue to the soil or regularly adding other organic material improves fertility, minimizes crusting, and increases the water intake rate. If properly managed, this sot( can produce 6 tons of irrigated alfalfa hay and 26 tons of corn silage per acre. This soil is well suited to homesite development in areas where flood protection is provided. The capability classification is Ile, irrigated, and Vlc, nonirrigated. The soil is in the Overflow #36 range site.