2012-10-01_REVISION - M1978116 (17)

Home Browse Search

San Miguel Area, Colorado, Parts of Dolores, Montrose, and San Miguel Counties 17 —Barx- Progresso complex, 3 to 12 percent slopes Map Unit Setting Elevation: 5,300 to 6,800 feet Mean annual precipitation: 10 to 14 inches Mean annual air temperature: 46 to 48 degrees F Frost -free period: 110 to 130 days Map Unit Composition Barx and similar soils: 45 percent Progresso and similar soils: 40 percent Minor components: 15 percent Description of Barx Setting Landform: Mesas, terraces Landform position (three- dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Parent material: Alluvium derived from sandstone Properties and qualities Slope: 3 to 12 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in /hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 45 percent Maximum salinity: Nonsaline to very slightly saline (2.0 to 4.0 mmhos /cm) Sodium adsorption ratio, maximum: 10.0 Available water capacity: High (about 9.5 inches) Interpretive groups Land capability (nonirrigated): 6e Ecological site: Semidesert Sandy Loam (R035XY326C0) Typical profile 0 to 2 inches: Fine sandy loam 2 to 23 inches: Sandy clay loam 23 to 74 inches: Loam Description of Progresso Setting Landform: Mesas, terraces Landform position (three- dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Custom Soil Resource Report 12 Parent material: Alluvium derived from sandstone Properties and qualities Slope: 3 to 12 percent Depth to restrictive feature: 20 to 40 inches to lithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to I -4