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Custom Soil Resource Report <br /> Ridgway Area, Colorado, Parts of Delta, Gunnison, Montrose, and <br /> Ouray Counties <br /> 701—Montrose-Delta complex, 0 to 2 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: k2f9 <br /> Elevation: 4,500 to 5,800 feet <br /> Mean annual precipitation: 6 to 8 inches <br /> Mean annual air temperature: 50 to 55 degrees F <br /> Frost-free period: 140 to 180 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Montrose and similar soils: 65 percent <br /> Delta and similar soils: 25 percent <br /> Minor components: 10 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Montrose <br /> Setting <br /> Landform: Stream terraces <br /> Landform position (three-dimensional): Tread <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from calcareous shale <br /> Typical profile <br /> Apt -0 to 4 inches: silty clay loam <br /> Ap2-4 to 13 inches: silty clay <br /> Btz- 13 to 36 inches: silty clay <br /> BCz-36 to 47 inches: silty clay loam <br /> C-47 to 65 inches: silty clay loam <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Well drained <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately low to <br /> moderately high (0.07 to 0.21 in/hr) <br /> Depth to water table: More than 80 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum in profile: 17 percent <br /> Gypsum, maximum in profile: 4 percent <br /> Salinity, maximum in profile: Very slightly saline to moderately saline (2.0 to 8.0 <br /> mmhos/cm) <br /> Sodium adsorption ratio, maximum in profile: 8.0 <br /> Available waterstorage in profile: High (about 9.7 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 3e <br /> Land capability classification (nonirrigated): 7c <br /> Hydrologic Soil Group: C <br /> 14 <br />