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26—Haverson loam, 1 to 3 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 2tlg0 <br /> Elevation:4,140 to 5,080 feet <br /> Mean annual precipitation: 13 to 17 inches <br /> Mean annual air temperature: 50 to 54 degrees F <br /> Frost-free period: 135 to 160 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Haverson, rarely flooded, and similar soils: 90 percent <br /> Minor components: 10 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Haverson, Rarely Flooded <br /> Setting <br /> Landform: Flood plains,terraces <br /> Landform position (three-dimensional):Tread <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Stratified alluvium derived from mixed sources <br /> Typical profile <br /> Ap-0 to 4 inches: loam <br /> A-4 to 11 inches: loam <br /> C1- 11 to 19 inches: loam <br /> C2- 19 to 80 inches: stratified sandy loam to loam <br /> Properties and qualities <br /> Slope: 1 to 3 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Drainage class: Well drained <br /> Runoff class: Low <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high <br /> (0.20 to 6.00 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: Rare <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum content: 5 percent <br /> Maximum salinity: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) <br /> Sodium adsorption ratio, maximum: 1.0 <br /> Available water supply,0 to 60 inches: Moderate (about 7.6 inches) <br />