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Be—Green River silty clay loam, 0 to 2 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: k06r <br /> Elevation:4,430 to 4,820 feet <br /> Mean annual precipitation:6 to 9 inches <br /> Mean annual air temperature: 50 to 55 degrees F <br /> Frost-free period: 135 to 180 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Green river and similar soils:90 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Green River <br /> Setting <br /> Landform: Flood-plain steps <br /> Landform position (three-dimensional):Tread <br /> Down-slope shape: Linear <br /> Across-slope shape. Linear <br /> Parent material: Clayey alluvium over coarse-loamy alluvium derived from sandstone and shale <br /> Typical profile <br /> Ap -0 to 10 inches: silty clay loam <br /> C1 - 10 to 16 inches:fine sandy loam <br /> C2- 16 to 24 inches:fine sandy loam <br /> C3-24 to 32 inches:fine sandy loam <br /> C4-32 to 44 inches:fine sandy loam <br /> C5-44 to 52 inches:fine sandy loam <br /> 2C- 52 to 60 inches:very cobbly sand <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Moderately well drained <br /> Runoff class: Low <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately high (0.21 to 0.71 in/hr) <br /> Depth to water table:About 36 to 60 inches <br /> Frequency of flooding:Very rare <br /> Frequency of ponding: None <br /> Calcium carbonate, maximum in profile: 5 percent <br /> Salinity, maximum in profile:Very slightly saline to moderately saline (2.0 to 8.0 mmhos/cm) <br /> Sodium adsorption ratio, maximum in profile: 5.0 <br /> Available water storage in profile: Moderate (about 7.1 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated):4e <br /> Land capability classification (nonirrigated): 7c <br /> Hydrologic Soil Group: C <br /> Ecological site. River Floodplain (Fremont Cottonwood) (R034BY011 UT) <br /> Hydric soil rating: No <br /> 23 1/4 West <br /> July 2020 I-3 Grog IAicki and Aswciateti PI.1.( <br />