LOCATION BRAILSFORD IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Aquic Haploxeralfs
TYPICAL PEDON: Brailsford loam, dryfarm cropland. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 8 inches; gray (10YR 6/1) loam, dark gray (10YR 4/1) moist; weak thin platy structure parting to weak fine granular; hard, very friable, slightly sticky and slightly plastic; few fine and medium roots; many fine interstitial pores; neutral (pH 7.2); clear smooth boundary (7 to 9 inches thick)
A2--8 to 12 inches; gray (10YR 6/1) loam, dark gray (10YR 4/1) moist; moderate thin platy structure parting to moderate fine granular; hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many fine tubular pores; neutral (pH 7.2); clear smooth boundary. (1 to 4 inches thick)
B21t--12 to 16 inches; pale brown (10YR 6/3) sandy clay loam, brown (10YR 5/3) moist; dark brown (10YR 4/3) organic staining on vertical faces of peds; strong coarse columnar structure parting to moderate medium angular blocky; very hard, very firm, sticky and plastic; common fine roots on vertical faces of peds; many fine tubular pores; thin continuous clay films on faces of peds and in pores; thick capping of light gray (10YR 6/1) uncoated silt grains on columns; moderately alkaline (pH 8.0); abrupt wavy boundary. (3 to 8 inches thick)
B22t--16 to 30 inches; light brownish gray (2.5Y 6/2) sandy clay loam, brown (10YR 5/3) moist; dark brown (10YR 4/3) stains on vertical faces of peds; moderate medium prismatic structure parting to moderate medium angular blocky; hard, firm, sticky and plastic; few fine roots; many fine tubular pores; thin nearly continuous clay films on faces of peds and in pores; moderately alkaline (pH 8.2); gradual wavy boundary. (10 to 16 inches thick)
B3tg--30 to 39 inches; light brownish gray (2.5Y 6/2) sandy clay loam, grayish brown (2.5Y 5/2) moist; few fine distinct mottles of light olive brown (2.5Y 5/4) and olive brown (2.5Y 4/4) moist; weak medium prismatic structure parting to moderate fine and medium subangular blocky; slightly hard, friable, sticky and plastic; few fine roots; many fine and medium tubular pores; thin discontinuous clay films on faces of peds and in pores; slightly effervescent matrix, few 2 to 5 mm rounded concretions; strongly alkaline (pH 8.8); clear wavy boundary. (6 to 10 inches thick)
C1g--39 to 45 inches; light brownish gray (2.5Y 6/2) fine gravelly sandy clay loam, light olive brown (2.5Y 5/4) moist; many fine prominent mottles of greenish gray (5G 5/1) and bluish gray (5B 5/1) moist; moderate medium and coarse subangular blocky structure; hard, firm, sticky and plastic; moderately alkaline (pH 8.4); abrupt wavy boundary. (3 to 5 inches thick)
IIC2--45 to 60 inches; light gray (10YR 7/2) sand, pale brown (10YR 6/3) moist; single grained; loose; mildly alkaline (pH 7.6).
TYPE LOCATION: Camas County, Idaho; about 2 miles east and 1 mile north of Corral; 2,290 feet west and 50 feet south of the NE corner of section 9, T.1S., R.13E.
RANGE IN CHARACTERISTICS: The solum thickness is 30 to 45 inches. The soils are saturated to the surface for one to two months in the spring. They have a water table that fluctuates from 30 to 40 inches for the remainder of the year. Depth to mottles is 30 to 40 inches. Coarse fragments make up 0 to 10 percent of the solum. The mean annual soil temperature is 41 degrees to 45 degrees F.
The A horizon has hue of 10YR or 2.5Y, value of 6 or 7 dry, 4 or 5 moist, and chroma of 2 or less.
The B2t horizon has hue of 10YR or 2.5Y, value of 6 or 7 dry, 3 through 5 moist and chroma of 2 or 3. It is sandy clay loam or clay loam. Mottles are district to prominent.
The C horizon has hue of 10YR or 2.5Y, value of 6 or 7 dry, 5 or 6 moist, and chroma of 2 through 4. Some pedons are weakly cemented by lime and have common 2 to 5 mm manganese oxide shot.
COMPETING SERIES: This is the Odin series in another family. Odin soils have mesic soil temperature.
GEOGRAPHIC SETTING: Brailsford soils are in slightly concave depressions on low alluvial terraces and have slopes of less than 2 percent. The soils formed in mixed alluvium mainly from acid igneous rocks. Elevations range from 4,800 to 6,000 feet. The climate is Humid continental, cool summers (Trewartha's modified Koppen system) with moist, cold winters and dry summers. Mean annual precipitation is from 12 to 16 inches. Average January temperature is 15 degrees F.; average July temperature is 66 degrees F.; mean annual temperature is 39 degrees to 42 degrees F. Frost-free season is 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brinegar, Strom, Riceton, and Simonton soils. These soils have mollic epipedons.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; ponded runoff; slow permeability.
USE AND VEGETATION: Used for dryfarm and range. Under cultivation these soils produce sparse vegetation. Vegetation is mainly silver sagebrush and water tolerant grasses.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
DISTRIBUTION AND EXTENT: South-central and southwestern Idaho. Series is inextensive.
SERIES ESTABLISHED: Camas County, Idaho, 1977.