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A1B=Fluvents-Fluvaquents complex, 0 to 3 percent slopes <br /> Setting <br /> Landscape position: Flood plains <br /> Parent material: Kind=alluvium; source=mixed <br /> Native plant community: River bottom <br /> Elevation: 5 , 000 to 7 ,400 feet <br /> Mean annual temperature: 46 to 56 degrees F <br /> Mean annual precipitation: a to 16 inches <br /> Frost-free period: 100 to 160 days <br /> Composition <br /> Fluvents and similar inclusions: 55 percent <br /> Fluvaquents and similar inclusions: 30 percent <br /> Contrasting inclusions: 15 percent <br /> Characteristics of the Fluvents <br /> Landscape position: Flood plains <br /> Slope range: 0 to 3 percent <br /> Parent material: Kind=alluvium; source=mixed <br /> Reference Profile: <br /> 0 to 6 inches=dark brown fine sandy loam <br /> 6 to 60 inches=stratified light yellowish brown to dark <br /> yellowish brown very gravelly loamy coarse sand to gravelly <br /> sand <br /> Soil Properties <br /> Depth class: Very deep <br /> Drainage class: Somewhat excessively drained <br /> Permeability: Rapid <br /> Available water capacity: Low <br /> Potential rooting depth: 60 inches or more <br /> Flooding: Occasional <br /> Water table: 60 inches or more <br /> Runoff: Very low <br /> Hazard of water erosion: Moderate <br /> Hazard of wind erosion: Slight <br /> Shrink-swell potential: Low <br /> Characteristics of the Fluvaquents <br /> Landscape position: Flood plains <br /> Slope range: 0 to 1 percent <br /> Parent material: Kind=alluvium; source=mixed <br /> Reference Profile: <br />