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Map Unit Description <br />Otero County, Colorado <br />Cg Cascajo soils and gravelly land <br />Setting <br />Landscape: River valleys <br />Elevation: 3500 to 5600 feet <br />Mean annual precipitation: 10 to 14 inches <br />Mean annual air temperature: 52 to 54 degrees F <br />Frost-free period: 120 to 180 days <br />Composition <br />Cascajo and similar soils: 60 percent <br />Gravelly land: 30 percent <br />Description of Cascajo <br />Setting <br />Landform: Ridges, terraces <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent material: Calcarous, cobbly, gravelly sandy alluvium over residuum weathered from shale <br />Properties and Qualities <br />Slope: 2 to 25 percent <br />Depth to restrictive feature: 40 to 60 inches to Paralithic bedrock <br />Drainage class: Excessively drained <br />Capacity of the most limiting layer to transmit water (Ksat): Moderately low or moderately high (0.06 to 0.20 in/hr) <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Calcium carbonate maximum: 15 percent <br />Gypsum maximum: 2 percent <br />Available water capacity: Low (about 4.0 inches) <br />Interpretive Groups <br />Land capability (non irrigated): 7s <br />Ecological site: Gravel Breaks (R069XY064CO) <br />Other vegetative classification: Gravel Breaks (069XY064C0_1) <br />Typical Profile <br />0 to 6 inches: gravelly loam <br />6 to 21 inches: very gravelly loam <br />21 to 36 inches: very gravelly sand <br />36 to 45 inches: silty clay <br />45 to 49 inches: weathered bedrock <br />Description of Gravelly land <br />Setting <br />Landform: Ridges <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent material: Calcarous, cobbly, gravelly sandy alluvium <br />Properties and Qualities <br />Slope: 2 to 25 percent <br />Drainage class: Excessively drained <br />Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr) <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Calcium carbonate maximum: 25 percent <br />Gypsum maximum: 0 percent <br />Available water capacity: Low (about 4.0 inches) <br />Interpretive Groups <br />Land capability (non irrigated): 7s <br />Ecological site: Gravel Breaks (R069XY064CO) <br />Other vegetative classification: Gravel Breaks (069XY064C0_1) <br />USDA Natural Resources <br />Tabular Data Version: 6 <br />?- Conservation Service Tabular Data Version Date: 01/11/2008 Page 1 of 5