LOCATION BRADSHAW UT+ID NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Typic Haploxerolls
TYPIFYING PEDON: Bradshaw very cobbly very fine sand loam, native vegetation. (Colors are for air dry soil unless otherwise noted.)
A11--0 to 3 inches; dark grayish brown (10YR 4/2) very cobbly very fine sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky, nonplastic; many fine roots; 60 percent angular cobbles and gravel; mildly alkaline (pH 7.5); clear wavy boundary. (2 to 10 inches thick)
A12--3 to 11 inches; dark grayish brown (10YR 4/2) cobbly very fine sandy loam; very dark grayish brown (10YR 3/2) moist; weak medium granular structure; slightly hard, very friable, nonsticky, nonplastic; common fine roots; 50 percent angular cobbles and gravel; mildly alkaline (pH 7.5); clear wavy boundary. (8 to 12 inches thick)
B2--11 to 29 inches; brown (10YR 5/3) very cobbly very fine sandy loam, brown (10YR 4/3) moist; very weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few fine roots; 65 percent angular cobbles and gravel; soil mass in noncalcareous with few slightly calcareous pockets and thin lime coatings on some coarse fragments; mildly alkaline (pH 7.5); clear irregular boundary. (10 to 22 inches thick)
C1--29 to 40 inches; brown (10YR 5/3) very cobbly loam, brown (10YR 4/3) moist; massive; slightly hard, friable, slightly sticky, slightly plastic; few fine roots; 70 percent angular cobbles and gravel; noncalcareous with thin lime coatings on some coarse fragments; mildly alkaline (pH 7.5); clear wavy boundary. (10 to 15 inches thick)
C2--40 to 62 inches; brown (10YR 5/3) very cobbly loam, brown (10YR 4/3) moist; massive; slightly hard, friable, nonsticky, nonplastic; few fine roots; 80 percent angular cobbles and gravel; noncalcareous with thin lime coatings on some coarse fragments; mildly alkaline (pH 7.6).
TYPE LOCATION: Wasatch County, Utah; 4.75 miles south of Heber "Y" in Daniels Canyon, 1/4 mile east up side of canyon on south-facing slope, 2,320 feet south and 1,600 feet east of the northwest corner of sec. 26, T.4S., R.5E.
RANGE IN CHARACTERISTICS: The mollic epipedon is 10 to 20 inches thick. The combined thickness of the A1 and B2 horizons ranges from 24 to 32 inches. The average texture of the 10- to 40-inch control section is very cobbly very fine sandy loam or very cobbly fine sandy loam with less than 18 percent clay and 50 to 80 percent cobbles and gravel. Cobble and loam with less than 18 percent clay and 50 to 80 percent cobbles and gravel. Cobble and gravel content generally increases with depth, ranging mainly from 20 to 70 percent in the A horizons and 50 to 80 percent in the B2 and C horizons. The mean annual soil temperature is 40 degrees to 45 degrees F., and the mean summer temperature at 20 inches depth is 60 degrees to 65 degrees F. The soils are usually moist but are dry for 60 to 75 consecutive days in all parts of the moisture control section during the summer. The A1 horizon has value of 3 through 5 dry, 2 or 3 moist, and chroma of 2 or 3. It contains less than 1 percent organic matter. This horizon is very cobbly very fine sandy loam to very cobbly or very gravelly fine sandy loam or very cobbly or very gravelly light loam. It has weak, fine and medium subangular blocky structure. It is mildly alkaline to slightly acid. The C horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, 4 or 5 moist, and chroma of 2 or 3. It is noncalcareous to slightly calcareous and slightly acid to moderately alkaline.
COMPETING SERIES AND THEIR DIFFERENTIAE: These are the Burgi, Fuego (T), Horrocks, Mud Springs (T), and St. Marys series. Burgi soils have mollic epipedons more than 20 inches thick and lack cambic horizons. Fuego and Mud Springs soils have lithic contacts at depths of 20 to 40 inches. Horrocks soils have very cobbly argillic horizons. St. Marys soils have hue of 5YR or 2.5YR in the B horizons.
SETTING: Bradshaw soils are on slightly convex south-and west-facing, very steep mountain slopes at elevations o 6,000 to 8,000 feet. Slope gradients are 25 to 80 percent. The soils formed in residuum and colluvium derived from sandstone, quartzite, and minor amounts of limestone. The climate is moist subhumid continental; the average annual precipitation ranges from 20 to 26 inches, falling mostly as snow. The mean annual precipitation ranges from 20 to 26 inches, falling mostly as snow. The mean annual temperature ranges from 40 degrees to 46 degrees F., and the mean summer temperature ranges from 60 degrees to 65 degrees F. The frost-free period ranges from 80 to 100 days.
PRINCIPAL ASSOCIATED SOILS: These are the Bezzant, Daybell, Gappmayer, Harkers, Henefer, Wallsburg soils. Bezzant soils have calcic horizons and are calcareous throughout. Daybell soils have mean annual temperature of less than 59 degrees F. Gappmayer soils have albic horizons and very cobbly sandy clay loam argillic horizons. Harkers soils have gravelly clay argillic horizons. Henefer soils have cobbly clay argillic horizons. Wallsburg soils are less than 20 inches deep over bedrock and have very stony heavy clay loam argillic horizons.
DRAINAGE AND PERMEABILITY: Well-drained; medium runoff; moderate or moderately rapid permeability.
USE AND VEGETATION: These soils are used for range and grazing by livestock and wildlife, and for watershed. The present vegetation is big sagebrush, serviceberry, bitterbrush, oakbrush, bluebunch wheatgrass, Great Basin wildrye, western wheatgrass, yellowbrush, and cheatgrass.
MLRA OFFICE RESPONSIBLE: Lakewood, Colorado
DISTRIBUTION AND EXTENT: Mountain areas in Northern Utah. The series is moderately extensive.
SERIES ESTABLISHED: Sanpete Soil Survey Area, Utah, 1971.
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated.
REMARKS: The Bradshaw soils were formerly classified as Regosols.
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated.