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Custom Soil Resource Report <br /> Weld County, Colorado, Southern Part <br /> 1—Altvan loam, 0 to 1 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 361j <br /> Elevation: 4,500 to 4,900 feet <br /> Mean annual precipitation: 14 to 16 inches <br /> Mean annual air temperature: 46 to 48 degrees F <br /> Frost-free period: 130 to 150 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Altvan 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 Altvan <br /> Setting <br /> Landform: Terraces <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Old alluvium <br /> Typical profile <br /> H1 -0 to 10 inches: loam <br /> H2- 10 to 25 inches: clay loam <br /> H3-25 to 60 inches: gravelly sand <br /> Properties and qualities <br /> Slope: 0 to 1 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Well drained <br /> Runoff class: Low <br /> Capacity of the most limiting layer to transmit water(Ksat): Moderately high to <br /> high (0.20 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 in profile: 5 percent <br /> Available water storage in profile: Low (about 5.7 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 3s <br /> Land capability classification (nonirrigated): 4e <br /> Hydrologic Soil Group: B <br /> Ecological site: Loamy Plains (R067BY002CO) <br /> Hydric soil rating: No <br /> Minor Components <br /> Cascajo <br /> Percent of map unit. 9 percent <br /> Hydric soil rating: No <br /> 14 <br />