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Minor Components <br /> Stoneham <br /> Percent of map unit 10 percent <br /> Landform: Interfluves <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Ecological site. Loamy Plains(R067BY002CO) <br /> Hydric soil rating: No <br /> Mentor <br /> Percent of map unit. 5 percent <br /> Landform- Interfluves <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Ecological site: Sandy Plains(R067BY024CO) <br /> Hydnc soil rating. No <br /> CbC—Colby loam, 3 to 5 percent slopes <br /> Map Unit Setting <br /> National map unit symbol. 3pwj <br /> Elevation: 4,000 to 5,500 feet <br /> Mean annual precipitation: 12 to 16 inches <br /> Mean annual air temperature: 48 to 50 degrees F <br /> Frost-free period: 135 to 155 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Colby 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 Colby <br /> Setting <br /> Down-slope shape: Convex <br /> Across-slope shape: Convex <br /> Parent material. Loamy loess and/or sandy loess and/or nearly uniform silty loess <br /> Typical profile <br /> Hf-0 to 4 inches: loam <br /> H2-4 to 28 inches. silt loam <br /> H3-28 to 60 inches: very fine sandy loam <br /> Properties and qualities <br /> Slope: 3 to 5 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Well drained <br /> Runoff class: Low <br /> 54 <br />