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ADVANCED COPY SUBJECT TO CHANGE <br />• <br />• <br />• <br />838-Xeribrush-Yonder complex, <br />25 to 65 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 117 degrees <br />F. (7.2 to 47.0 degrees C.) <br />Freeze-free period. 110 to 130 days <br />Map Unit Composition <br />Xeribrush and similar soils: 55 percent <br />Yonder and similar soils: 20 percent <br />Minor components: <br />Component Descriptions <br />Xeribrush soils <br />Landform: Hillsides <br />Position on landform: Backslopes <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: 25 to 65 percent <br />Surface fragments: About 20 percent <br />subrounded gravel, about 10 percent <br />subrounded cobbles, about 2 percent <br />subrounded stones, about 1 percent <br />subrounded boulders <br />Depth to restrictive feature: Greater then 60 <br />inches <br />Drainage class: Well drained <br />Slowest permeability:.06 to 0.2 in/hr (slow) <br />Available water capacity. About 7.7 inches <br />(moderate) <br />Shrink-swell potential. About 3.9 percent <br />(moderate) <br />Flooding hazard. None <br />Ponding hazard: None <br />Seasonal high water table depth: Unspecified <br />Runoff class: 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: 12 to 16 <br />inches (305 to 406 millimeters) <br />Ecological site: Unspecified <br />Potential native vegetation: Unspecified <br />Land capability subclass (irrigated): 7e <br />Land capability subclass (nonirrigated): 7e <br />Typical Profile: <br />A-0 to 12 inches; gravelly loam <br />Btl-12 to 19 inches; gravelly clay loam <br />Bt2-19 to 32 inches; clay <br />Btk-32 to 48 inches; stony clay loam <br />BCk-48 to 60 inches; cobbly clay loam <br />Yonder soils <br />Landform: Hillsides <br />Position on landform: Backslopes <br />Parent material: Colluvium and/or slope alluvium <br />derived from calcareous shale and/or mixed <br />sources <br />Slope: 25 to 65 percent <br />Surface fragments: About 20 percent <br />subrounded gravel, about 10 percent <br />subrounded cobbles, about 2 percent <br />subrounded stones, about 1 percent <br />subrounded boulders <br />Depth to restrictive feature: Greater then 60 <br />inches <br />Drainage class: Well drained <br />Slowest permeability:.06 to 0.2 in/hr (slow) <br />Available water capacity. About 6.6 inches <br />(moderate) <br />Shrink-swell potential. About 3.2 percent <br />(moderate) <br />Flooding hazard. None <br />Ponding hazard: None <br />Seasonal high water table depth: Unspecified <br />Runoff class: 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: 12 to 16 <br />inches (305 to 406 millimeters) <br />Ecological site: Unspecified <br />Potential native vegetation: Unspecified <br />Land capability subclass (irrigated): Unspecified <br />Land capability subclass (nonirrigated): 7e <br />Typical Profile: <br />A-0 to 12 inches; very stony loam <br />Btl-12 to 23 inches; very gravelly clay loam <br />Bt2-23 to 28 inches; gravelly clay <br />Btk1-28 to 33 inches; very cobbly clay <br />Btk2-33 to 41 inches; gravelly clay loam <br />BCk-41 to 60 inches; gravelly clay loam <br />PRR 2/06