LOCATION CODLEY UTEstablished Series
TAXONOMIC CLASS: Fine-silty, carbonatic, frigid Ustic
Torriorthents
TYPICAL PEDON: Codley silt loam--rangeland. (Colors are for air-dry soil unless otherwise stated.)
A--0 to 7 inches; light brown (7.5YR 6/4) silt loam, dark brown (7.5YR 4/4) moist; weak thick platy structure that parts to weak fine granular; hard, friable, sticky and plastic; common fine, few medium and coarse roots; common very fine and fine tubular pores; very strongly calcareous; strongly alkaline (pH 8.6); clear smooth boundary. (5 to 10 inches thick)
C1--7 to 17 inches; light brown (7.5YR 6/4) silt loam, brown (7.5YR 5/4) moist; massive; very hard, friable, sticky and plastic, few fine, medium and coarse roots; common very fine and fine, and few coarse tubular pores; very strongly calcareous; strongly alkaline (pH 8.6); gradual wavy boundary. (8 to 15 inches thick)
C2--17 to 30 inches; pink (5YR 7/4) silty clay loam, yellowish red (5YR 5/6) moist; moderate medium subangular blocky structure; very hard, firm, sticky and plastic; few fine and many very fine roots; many very fine and few coarse tubular pores; very strongly calcareous; strongly alkaline (pH 8.6); gradual wavy boundary. (10 to 20 inches thick)
C3--30 to 60 inches; pink (7.5YR 7/4) silt loam, strong brown (7.5YR 5/6) moist; weak fine granular structure; very hard, firm, sticky and plastic; few fine roots; many very fine and few coarse tubular pores; very strongly calcareous; strongly alkaline (pH 8.6).
TYPE LOCATION: Garfield County, Utah; 1-1/8 miles east of the junction of U.S. Highway 89, and Utah Highway 12 (Bryce Canyon turnoff); 1,800 feet north, 600 feet east of the southwest corner of sec. 19, T. 35 S., R. 4 1/2 W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 43 to 47 degrees F. The mean summer temperature is 60 to 62 degrees F. This soil is dry in parts of the moisture control section for 75 to 90 days during the winter and dry in all parts of the moisture control section 40 to 50 percent of the time when the soil temperature at a 20-inch depth is more than 41 degrees F. Calcium carbonate equivalent ranges from 40 to 60 percent.
The A horizon has value of 6 or 7 dry, 4 or 5 moist, and chroma of 3 or 4 moist or dry. It is moderately alkaline or strongly alkaline.
The C horizon has hue of 7.5YR or 5YR, value of 6 or 7 dry, 4 to 6 moist, and chroma of 2 to 6 dry and moist. It is silt loam or silty clay loam and averages 18 to 35 percent clay, more commonly 25 to 35 percent.
COMPETING SERIES: There are no series in the same family. Similar soils are the Descot, Greenhalgh and Karde series. Descot soils are coarse-loamy family. Greenhalgh soils have less than 40 percent calcium carbonate equivalent and have hue of 10YR or yellower. Karde soils are in a mesic soil temperature regime.
GEOGRAPHIC SETTING: The Codley soils are at elevations of 6,500 to 7,200 feet. They formed in limestone and sandstone and are on fan terraces, valley plains and flood plains. Slopes are 1 to 10 percent. The climate is semiarid with average annual precipitation ranging from 9 to 12 inches. Mean annual temperature is 40 to 45 degrees F. Freeze-free period is from 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Luhon soils and the competing Descot and Greenhalgh soils. Luhon soils are fine-loamy and have a calcic horizon and are on the upper more stable parts of the fans.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately slow permeability.
USE AND VEGETATION: Used for rangeland, wildlife habitat and irrigated cropland. Native vegetation is basin big sagebrush, winterfat, Indian ricegrass and western wheatgrass. Principal crops are alfalfa hay, oats and barley.
DISTRIBUTION AND EXTENT: South-central Utah, Western Garfield County. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Panguitch Area, Garfield County, Utah, 1984.
REMARKS: Codley soils were previously classified as Torrifluvents, but are on relatively stable, nonflooding landscapes and lack the irregular decrease in organic matter required for that placement.