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• CeD =Shawn loam, 5 to 15 percent <br />slopes <br />setting <br />Landform: Foothills, mountains <br />Position on landscape: Foot <br />slopes, drainageways <br />Elevation: 6,200 to 7,800 feet <br />Native plants: Grass <br />Air temperature: 45 to 47 <br />degrees F <br />Annual precipitation: 15 to 22 <br />inches <br />Frost-free period: 80 to 110 <br />days <br />Composition <br />Shawn soil and similar <br />inclusions: 90 percent <br />Contrasting inclusions: 10 <br />percent <br />Typical Profile <br />Surface layer: <br />0 to 17 inches=loam <br />• Subsurface layer: <br />17 to 31 inches=loam <br />Substratum: <br />31 to 41 inches=clay loam <br />41 to 60 inches=loam <br />soil Properties and Qualities <br />Parent material: Alluvium, <br />colluvium <br />Depth class: Very deep <br />Drainage class: well drained <br />Permeability: Moderate <br />Available water capacity: High <br />Potential rooting depth: 60 or <br />more inches <br />Runoff: Slow to medium <br />Hazard of water erosion: High to <br />very high <br />Hazard of wind erosion: None <br />Carbonates: 31 to 60 <br />Similar Inclusions <br />Soils that are greater than 60 <br />inches to bedrock and average <br />. between 15 and 35 percent rock <br />fragments in the profile <br />Contrasting Inclusions <br />Soils that have a dark surface <br />layer and average between 8 to <br />18 percent clay in the profile <br />Soils that have a dark surface <br />layer less than 20 inches thick <br />Major Current Uses <br />Irrigated hay and pasture, <br />rangeland <br />Major Management Factors <br />Cropland <br />Soil-related factors: Water <br />erosion, steepness of slope <br />Suitability: Fair <br />Annual production: 4 tons of <br />irrigated grass hay per acre <br />Management considerations: <br />Irrigation water management <br />Land leveling <br />Control water erosion on steeper <br />slopes <br />Short growing season <br />Pasture management <br />Aindbreaks <br />Soil-related factors: Water <br />erosion <br />Suitability: Good <br />Management considerations: <br />Supplemental irrigation may be <br />necessary during dry periods <br />Trees suitable are Russian <br />olive, cottonwood, golden willow <br />Shrubs suitable are Honeysuckle, <br />caragana <br />IIrban Development <br />Soil-related factors: water <br />erosion, steepness of slope <br />Suitability as a site for <br />buildings: Good <br />Management considerations: <br />Steep slopes limit access and <br />possible sites for construction <br />Water erosion should be <br />controlled on steeper slopes <br />S-1-8 <br />