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Map Unit Description- Altvan fine sandy loam, 0 to 6 percent slopes -- -Weld County, Colorado, <br />Northern Part <br />Weld County, Colorado, Northern Part <br />1— Altvan fine sandy loam, 0 to 6 percent slopes <br />Map Unit Setting <br />Elevation: 3,500 to 5,500 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 />Map Unit Composition <br />Altvan and similar soils: 85 percent <br />Minor components: 15 percent <br />Description of Altvan <br />Setting <br />Landform: Plains <br />Down -slope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Calcareous gravelly alluvium <br />Properties and qualities <br />Slope: 0 to 6 percent <br />Depth to restrictive feature: 20 to 40 inches to strongly contrasting <br />textural stratification <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water <br />(Ksat): Moderately high to 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 content: 15 percent <br />Available water capacity: Low (about 4.6 inches) <br />Interpretive groups <br />Farmland classification: Farmland of statewide importance <br />Land capability classification (irrigated): 3e <br />Land capability (nonirrigated): 4e <br />Hydrologic Soil Group: B <br />Ecological site: Loamy Plains (R067BY002CO) <br />Typical profile <br />0 to 6 inches: Fine sandy loam <br />6 to 22 inches: Sandy clay loam <br />22 to 27 inches: Sandy clay loam <br />27 to 60 inches: Gravelly coarse sand <br />Minor Components <br />Ascalon <br />Percent of map unit: 5 percent <br />USDA Natural Resources Web Sod Survey 11/20/2013 <br />Conservation Service National Cooperative Sod Survey Page 1 of 2 <br />