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ADVANCED COPY SUBJECT TO CHANGE <br />• <br />• <br />C7 <br />839-Xeribrush loam, 3 to 30 <br />percent slopes <br />Map Unit Setting <br />Major Land Resource Area: 48A <br />Elevation: 6,400 to 8,400 feet (1,951 to 2,560 <br />meters) <br />Mean annual precipitation: 12 to 16 inches (305 <br />to 406 millimeters) <br />Mean annual air temperature: 45 to 47 degrees <br />F. (7.2 to 8.3 degrees C.) <br />Freeze-free period: 110 to 130 days <br />Map Unit Composition <br />Xeribrush and similar soils: 70 percent <br />Minor components: 30 percent <br />Component Descriptions <br />Xeribrush soils <br />Landscape: Unspecified <br />Landform: Hillslopes <br />Position on landform: Head Slope, Base Slope, <br />Side Slope and Crest <br />Parent material. Colluvium derived from mixed <br />sources and silty and clayey slope alluvium <br />derived from calcareous shale and mixed <br />sources <br />Slope: 3 to 30 percent <br />Surface fragments: About 5 percent subrounded <br />stones, about 5 percent subrounded <br />cobbles, about 1 percent subrounded <br />boulders, about 5 percent subrounded gravel <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Slowest permeability:.06 to 0.2 in/hr (slow) <br />Available water capacity. About 9.6 inches (high) <br />Shrink-swell potential: About 5.9 percent <br />(moderate) <br />Flooding hazard: None <br />Ponding hazard. None <br />Seasonal high water table depth: Unspecified <br />Runoff class: Very high <br />Calcium carbonate maximum: About 15 percent <br />Gypsum maximum: About 2 percent <br />Salinity maximum: About 4 mmhos/cm (very <br />slightly saline) <br />Sodium adsorption ratio maximum: About 2 <br />(slightly sodic) <br />Relative effective annual precipitation: <br />Unspecified <br />Ecological site: Clayey Foothills <br />Potential native vegetation: western wheatgrass, <br />Wyoming big sagebrush, DOUGLAS <br />RABBITBRUSH, Indian ricegrass, mulesear <br />wyethia, snowberry, beardless wheatgrass, <br />muttongrass, serviceberry <br />Land capability subclass (irrigated): 7e <br />Land capability subclass (nonirrigated): 7e <br />Typical Profile: <br />Oi-0 to 1 inch; duff material <br />A-1 to 4 inches; loam <br />BAt-4 to 12 inches; clay loam <br />Bt-12 to 15 inches; clay loam <br />Btk1-15 to 27 inches; clay loam <br />Btk2-27 to 44 inches; clay <br />BCk-44 to 60 inches; clay loam <br />Minor Components <br />Cowcreek and similar soils <br />Composition: About 10 percent <br />Landscape: Unspecified <br />Landform: Hillslopes <br />Position on landform: Unspecified <br />Slope: 3 to 30 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard: None <br />Ecological site: Clayey Foothills <br />Distinguishing characteristics: Unspecified <br />Yonder and similar soils <br />Composition: About 10 percent <br />Landscape: Unspecified <br />Landform: Hillslopes <br />Position on landform: Unspecified <br />Slope: 3 to 30 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard: None <br />Ecological site: Clayey Foothills <br />Distinguishing characteristics: Unspecified <br />Johmurray and similar soils <br />Composition: About 5 percent <br />Landscape: Unspecified <br />Landform: Hillslopes <br />Position on landform: Unspecified <br />Slope: 3 to 30 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard. None <br />Ecological site: Loamy Foothills <br />Distinguishing characteristics: Unspecified <br />Dearrock and similar soils <br />Composition: About 3 percent <br />Landscape: Unspecified <br />Landform: Hillslopes <br />Position on landform: Unspecified <br />Slope: 3 to 30 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard: None <br />Ecological site: Brushy Loam <br />Distinguishing characteristics: Unspecified <br />Jarvie and similar soils <br />Composition: About 2 percent <br />Landscape: Unspecified