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• Frequency of flooding: None <br /> • Frequency of ponding: None <br /> • Available water capacity: Moderate(about 6.3 inches) <br /> Interpretive groups <br /> • Land capability classification (irrigatedJ: 6c <br /> • Land capability classification (nonirrigatedJ: 6c <br /> • Hydrologic Soil Group:A <br /> • Ecological site: R048AY222C0 <br /> • Hydric soil rating: No <br /> Minor Components <br /> Silvercliff <br /> • Percent of map unit: 15 percent <br /> • Hydric soil rating: No <br /> 21—Norriston very cobblv sandv loam.2 to 6 percent sloqes <br /> Map Unit Setting <br /> • National map unit symbol:jqly <br /> • Elevation:7,900 to 8,600 feet <br /> • Mean annual precipitation: 16 to 20 inches <br /> • Mean annual air temperature:40 to 44 degrees F <br /> • Frost free period:55 to 75 days <br /> • Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> • Norriston and similarsoils:80 percent <br /> • Minor components:20 percent <br /> • Estimates are based on observations, descriptions, and transects of the map unit. <br /> Description of Norriston <br /> Setting <br /> • Landform:Outwash terraces,outwash fans <br /> • Down-slope shape: Linear <br /> • Across-slope shape: Linear <br /> • Parent material:Glacial outwash <br /> Typical profile <br /> • H1 -0 to 11 inches:very cobbly sandy loam <br /> • H2-11 to 18 inches:extremely gravelly sandy loam <br /> • H3-18 to 34 inches:extremely gravelly loamy sand <br /> • H4-34 to 60 inches:extremely cobbly sand <br /> Properties and qualities <br /> • Slope:2 to 6 percent <br /> • Depth to restrictive feature: More than 80 inches <br /> • Drainage class:Well drained <br />