LOCATION CLEGG UT+IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Calcic Pachic Argixerolls
TYPICAL PEDON: Clegg loam, rangeland. (Colors are for air dry soil unless otherwise noted.)
A1--0 to 10 inches; dark grayish brown (10YR 4/2) loam, very dark brown (10YR 2/2) moist; weak fine granular structure; slightly hard, friable, nonsticky and slightly plastic; few fine and common medium roots; few fine tubular pores; slightly alkaline (pH 7.6); clear wavy boundary. (8 to 11 inches thick)
Bt1--10 to 21 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak medium angular blocky structure; hard, friable, slightly sticky and plastic; few fine and medium roots; few fine tubular pores; few faint clay films; slightly alkaline (pH 7.8); clear smooth boundary. (3 to 12 inches thick)
Bt2--21 to 28 inches; brown (10YR 5/3) clay loam, dark brown (10YR 3/3) moist; moderate medium and fine angular blocky structure; hard, firm, slightly sticky and plastic; few fine roots; few fine tubular pores; many faint clay films on faces of peds; slightly alkaline (pH 7.8); abrupt smooth boundary. (7 to 12 inches thick)
Btk--28 to 32 inches; pale brown (10YR 6/3) loam, brown (10YR 5/3) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few fine roots; few fine and medium tubular pores; few faint clay films; strongly effervescent, 22 percent calcium carbonate equivalent; moderately alkaline (pH 8.2); gradual smooth boundary. (3 to 10 inches thick)
Bk1--32 to 54 inches; very pale brown (10YR 8/2) sandy loam, light gray (10YR 7/2) moist; massive; weakly cemented, friable, nonsticky and nonplastic; few fine roots; few fine tubular pores; violently effervescent, 33 percent calcium carbonate equivalent; moderately alkaline (pH 8.2); gradual smooth boundary. (20 to 30 inches thick)
Bk2--54 to 64 inches; very pale brown (10YR 8/3) loam, pale brown (10YR 6/3) moist; massive; weakly cemented, friable, nonsticky and nonplastic; very fine and medium tubular pores; violently effervescent, 21 percent calcium carbonate equivalent; moderately alkaline (pH 8.4).
TYPE LOCATION: Beaver County, Utah; 5 miles west and 5 miles north of Manderfield; 400 feet west of the road, section 27, T.27S., R.8W.
RANGE IN CHARACTERISTICS: The mollic epipedon is 21 to 35 inches thick. Thickness of the argillic horizon ranges from 20 to 34 inches. Clay content of the particle size control section is 18 to 35 percent and coarse fragments range from 0 to 10 percent. Depth to the calcic horizon ranges from 24 to 40 inches. Calcium carbonate equivalent ranges 15 to 40 percent. The mean annual soil temperature is 41 to 47 degrees F., and the mean summer temperature is 61 to 63 degree F. The soils are usually moist but are dry for 60 to 75 consecutive days in all parts of the moisture control section in more than 7 out of 10 years.
The A horizon has value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3. It has weak thin platy or fine granular structure in the upper 2 to 4 inches and weak fine granular or weak medium subangular blocky structure below this depth. This horizon is slightly acid to slightly alkaline. Organic matter ranges 1 to 4 percent.
The Bt horizon has hue of 7.5YR or 10YR, value of 4 or 5 dry, 2 or 3 moist , and chroma of 2 or 3 dry and 1 to 3 moist to a depth of more than 20 inches. At depths greater than 20 inches, values may be 6 dry, 4 moist, and chroma of 4. Texture ranges from loam to light clay loam. Structure is weak to moderate, fine to coarse subangular blocky with many faint or distinct clay films on faces of peds. Reaction is slightly acid to slightly alkaline. Organic matter content ranges 1 to 2 percent.
The Btk horizon has hue of 7.5YR or 10YR, value of 5 or 6 dry, 2 or 4 moist, and chroma of 2 to 4. Organic matter content ranges 1 to 2 percent. Calcium carbonate equivalent ranges 15 to 40 percent. Texture is loam or clay loam.
The Bk horizon has value of 6 to 8 dry, 4 through 7 moist, and chroma of 2 to 4. It ranges from sandy loam to clay loam. This horizon is moderately or strongly alkaline. Calcium carbonate equivalent ranges 5 to 25 percent. Rock fragments range from 0 to 25 percent.
COMPETING SERIES: These are the Despain, Gross, Jensen, and Lize series. Despain and Lize soils contain more than 20 percent coarse fragments in the particle size control section. Gross soils have a lithic contact at depths of 20 to 40 inches. Jensen soils have more than 10 percent coarse fragments in the control section.
GEOGRAPHIC SETTING: These soils are on nearly level to steep alluvial fans at elevations of 5,600 to 7,300 feet. Slope gradients are 1 to 30 percent. The soils formed in residuum and colluvium derived from basic and intermediate igneous, sedimentary, and metasedimentary rocks. The climate is moist subhumid, and the average annual precipitation is 15 to 25 inches. The mean annual temperature is 39 to 45 degrees F, and the mean summer temperature is about 63 degrees F. The frost free season is 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Deer Creek, Red Butte, and Ushar soils, and the Mower, Lizzant, and Watkins Ridge soils. Lizzant, Mower, and Watkins Ridge soils lack argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow or moderate permeability.
USE AND VEGETATION: These soils are used principally for rangeland for livestock and wildlife. Some are used for irrigated alfalfa and small grains. The principal native vegetation is bluebunch wheatgrass, native bluegrasses, needleandthread grass, western wheatgrass, balsamroot, big sagebrush, bitterbrush, serviceberry, oakbrush, and associated forbs.
DISTRIBUTION AND EXTENT: Central and northern Utah. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Sanpete Soil Survey Area, Utah, 1971.
REMARKS: Clegg soils were previously classified as Chestnut soils.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - from the surface to a depth of 28 inches.
Argillic horizon - the zone of clay accumulation from 10 to 32 inches.
Calcic horizon - the zone of calcium carbonate accumulation from 28 to 32 inches.