LOCATION CATDRAW CO+UT
Established Series
Rev. JPP-TWH-KLS
04/2018
CATDRAW SERIES
The Catdraw series consists of very deep, well drained soils that formed in slope alluvium derived from sandstone and shale. Catdraw soils are on pediments. Slopes range from 3 to 12 percent. Mean annual precipitation is about 360 mm and the mean annual air temperature is about 8.9 degrees C.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, mesic Aridic Ustorthents
TYPICAL PEDON: Catdraw loam, on a south facing, simple, 4 percent slope in rangeland at an elevation of 1,860 meters. (Colors are for dry soil unless otherwise noted.) When described on June 21, 1987 the soil was dry from 0 to 152 cm.
A--0 to 8 cm; light brownish gray (10YR 6/2) loam, brown (10YR 4/3) moist; moderate fine granular structure; hard, friable, slightly sticky and slightly plastic: few fine and very fine roots throughout; neutral (pH 7.0); clear smooth boundary. (5 to 15 cm thick)
AC--8 to 23 cm; light brownish gray (10YR 6/2) clay loam, brown (10YR 4/3) moist; moderate medium platy structure: hard, friable, slightly sticky and slightly plastic; few very fine roots throughout; few fine tubular pores; neutral (pH 7.0); clear smooth boundary. (8 to 25 cm thick)
C1--23 to 84 cm; light brownish gray (10YR 6/2) clay loam, grayish brown (10YR 5/2) moist; massive; hard, friable, slightly sticky and slightly plastic; few medium and fine roots throughout; few fine and very fine tubular pores; slightly effervescent; 2 percent calcium carbonate; slightly alkaline (pH 7.4); clear smooth boundary. (25 to 76 cm thick)
C2--84 to 152 cm; pinkish gray (7.5YR 6/2) clay loam, brown (7.5YR 5/2) moist; weak medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few fine roots throughout; very few fine tubular pores; slightly effervescent; 3 percent calcium carbonate; slightly alkaline (pH 7.4).
TYPE LOCATION: Archuleta County, Colorado; about 32 kilometers east of Ignacio; located about 730 meters west and 700 meters south of the northeast corner of sec. 9, T. 32 N., R. 5 W.; Allison USGS quad; Lat. 37 degrees 02 minutes 01 second N., Long. 107 degrees 23 minutes 45 seconds W., NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture: The moisture control section is dry in some part more than six tenths of the time. The soil temperature at 51 cm is above 5.0 degrees C. (cumulative);
Mean annual soil temperature: 8.9 to 11.3 degrees C.
Mean summer soil temperature: 15.6 to 18.3 degrees C.
Depth to secondary calcium carbonate: 0 to 25 cm
Particle-size control section (weighted average):
Clay content: 20 to 30 percent
Rock fragments: 0 to 15 percent
A horizon
Hue - 10YR or 2.5Y
Value - 5 or 6 dry, 4 or 5 moist
Chroma - 2 to 4, dry or moist
Reaction (pH) - 6.6 to 7.8
C horizon(s)
Hue - 7.5YR to 2.5Y
Value - 5 or 6 dry, 4 or 5 moist
Chroma - 2 to 4, dry and moist
Texture - loam, clay loam
Clay content - 18 to 32 percent
Rock fragments - 0 to 15 percent gravel
Calcium carbonate equivalent - 1 to 10 percent
Reaction (pH) - 7.4 to 8.4
COMPETING SERIES:
Iwait (WY) - are moist in the moisture control section in spring and early summer
Kismt (CO) - are moist in the moisture control section in spring and early summer
Ucross soils (WY) - are moderately deep to bedrock
GEOGRAPHIC SETTING:
Landform - pediments
Elevation - 1,830 to 2,135 meters
Slopes - 3 to 12 percent
Parent material - slope alluvium derived from sandstone and shale
Mean annual air temperature - 7.2 to 10.0 degrees C.
Mean annual precipitation - 330 to 406 mm
Precipitation pattern - driest months are May and June; wettest months are July and August
Frost-free period - 110 to 130 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND PERMEABILITY: Well drained, medium runoff, moderate to moderately slow permeability.
USE AND VEGETATION: Used for rangeland, cropland, and wildlife habitat. The native vegetation is Indian ricegrass, prairie Junegrass, muttongrass, and western wheatgrass. Other common plants are big sagebrush, twoneedle pinyon, and Utah juniper.
DISTRIBUTION AND EXTENT: Southwestern Colorado and southeastern Utah; LRR D, MLRA 35, 36; small extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Archuleta County, Colorado, Archuleta soil survey area, 2002. The name is modified from a creek in the area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 25 to 102 cm. (C1 and part of C2 horizons)
Series control section: 0 to 152 cm.
A cambic horizon is not recognized in this soil because there is no change in color nor clear evidence of removal of carbonates. The variable effervescence is assumed to be related to deposition of the parent material.
Catdraw soils are in a mesic soil temperature regime with an ustic soil moisture class bordering on aridic.
National Cooperative Soil Survey
U.S.A.