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Custom Soil Resource Report <br /> 66—Colby silt loam, 1 to 4 percent slopes, eroded <br /> Map Unit Setting <br /> National map unit symbol: 2t52x <br /> Elevation: 3,610 to 4,920 feet <br /> Mean annual precipitation: 14 to 16 inches <br /> Mean annual air temperature: 50 to 54 degrees F <br /> Frost-free period: 130 to 170 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Colby, eroded, 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 Colby, Eroded <br /> Setting <br /> Landfonn: Ridges, hillslopes <br /> Landform position(two-dimensional): Shoulder <br /> Landform position(three-dimensional): Side slope <br /> Down-slope shape: Linear, convex <br /> Across-slope shape: Convex, linear <br /> Parent material: Loess <br /> Typical profile <br /> A -0 to 3 inches: silt loam <br /> Bk1 -3 to 12 inches: silt loam <br /> Bk2- 12 to 28 inches: silt loam <br /> C-28 to 79 inches: silt loam <br /> Properties and qualities <br /> Slope: 1 to 4 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 /> (0.60 to 2.00 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 content: 14 percent <br /> Maximum salinity.Very slightly saline(2.0 to 3.9 mmhos/cm) <br /> Sodium adsorption ratio, maximum:2.0 <br /> Available water supply, 0 to 60 inches: Very high (about 12.8 inches) <br /> Interpretive groups <br /> Land capability classification(irrigated): 4e <br /> Land capability classification(nonirrigated): 4e <br /> 22 <br />