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• Permeability is moderate. Available water capacity is moderate. <br />Effective rooting depth is 60 inches or more. Runoff is slow, and the hazard <br />of water erosion is slight. <br />This unit is used for livestock grazing and wildlife habitat. <br />The potential plant community on this unit is mainly basin wildrye, <br />western wheatgrass, mountain snowberry and mountain big sagebrush. Other <br />plants that characterize this site are muttongrass, slender wheatgrass, <br />common chokecherry and woods rose. The average annual production of air-dry <br />vegetation is about 2,500 pounds per acre. <br />If the range is overgrazed, the proportion of preferred forage plants <br />decreases and the proportion of less preferred forage plants increases. <br />Therefore, livestock grazing should be managed so that the desired balance of <br />preferred species is maintained in the plant community. Range seeding is <br />suitable if the range is in poor condition. The plants selected for seeding <br />• should meet the seasonal requirements of livestock or wildlife, or both. <br />Management practices suitable for use on this unit are proper range use, <br />deferred grazing, rotation grazing, and brush management. Brush management <br />improves deteriorated areas of range that are producing more woody shrubs than <br />were present in the potential plant community. <br />If this unit is used for homesite development, the main limitations are <br />rare hazard of flooding and moderate permeability. The limitation of moderate <br />permeability can be overcome by increasing the size of the absorption field. <br />This map unit is in capability subclass VIe. It is in Mountain Swale <br />range site. <br />34C--Coutis fine sandy loam, 3 to 12 percent slopes. This deep, some- <br />what excessively drained soil is in swales. It formed in alluvium derived <br />from sandstone. Elevation is 6,900 to 8,400 feet. The average annual pre- <br />cipitation is 20 to 25 inches, the average annual air temperature is 37 to <br />• 40 degrees F, and the frost-free season is 40 to 65 days. <br />Ex. 16-26 <br />