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PmC—Platner loam, 3 to 5 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 2tlmz <br /> Elevation: 3,580 to 5,600 feet <br /> Mean annual precipitation: 13 to 19 inches <br /> Mean annual air temperature: 46 to 52 degrees F <br /> Frost-free period: 140 to 165 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Platner and similar soils: 85 percent <br /> Minor components: 15 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Platner <br /> Setting <br /> Landform: I nterft uves <br /> Landform position(two-dimensional): Summit <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Mixed eolian deposits over calcareous tertiary alluvium <br /> Typical profile <br /> Ap-0 to 6 inches: loam <br /> Bt1 -6 to 11 inches: clay <br /> Bt2- 11 to 20 inches: clay <br /> Bk1 -20 to 27 inches: clay loam <br /> Bk2-27 to 37 inches: sandy clay loam <br /> C-37 to 80 inches: sandy loam <br /> Properties and qualities <br /> Slope: 3 to 5 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Well drained <br /> Runoff class: Medium <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately low to <br /> moderately high(0.06 to 0.20 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: 15 percent <br /> Salinity, maximum in profile: Nonsaline(0.1 to 1.0 mmhos/cm) <br /> Available water storage in profile: Moderate(about 7.9 inches) <br /> Interpretive groups <br /> Land capability classification(irrigated): 4e <br /> Land capability classification(nonirrigated): 4e <br /> Hydrologic Soil Group: C <br /> 54 <br />