LOCATION BRADER OR+CAEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, mesic, shallow Typic Haploxerepts
TYPICAL PEDON: Brader loam - on a 15 percent slope under Oregon white oak, shrubs, and grasses at 1,460 feet elevation. (Where described, the soil was dry throughout. Colors are for a moist soil unless otherwise stated.)
A--0 to 6 inches; dark brown (7.5YR 3/3) loam, light brown (7.5YR 6/3) dry; weak fine subangular blocky parting to moderate very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few medium roots; many interstitial pores; neutral (pH 6.8); clear smooth boundary. (4 to 8 inches thick)
Bw--6 to 13 inches, dark reddish brown (5YR 3/4) loam, light brown (7.5YR 6/4) dry; moderate fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common fine and medium roots; very many fine tubular pores; neutral (pH 6.7); abrupt smooth boundary. (6 to 15 inches thick)
Cr--13 inches; saprolite from sandstone. Few black stains in fractures.
TYPE LOCATION: Jackson County, Oregon, about 1.5 miles northeast of the community of Sams Valley; approximately 250 feet south of logging road; 1,575 feet east and 785 feet south of the northwest corner of sec. 28, T. 35 S., R. 2 W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to bedrock is 12 to 20 inches. The mean annual soil temperature is 52 to 56 degrees F. These soils are usually moist, but are dry between depths of 4 and 12 inches for 80 to 110 consecutive days or more in the four months following the summer solstice. The particle-size control section averages 0 to 25 percent rock fragments of which 0 to 20 percent are gravel and 0 to 5 percent are cobbles. It is slightly acid or neutral. Base saturation by ammonium acetate is 80 to 100 percent.
The A horizon has hue of 7.5YR or 10YR, value of 3 or 4 moist and 4 through 6 dry and chroma of 2 through 4 moist and dry. It has 1 to 3 percent organic matter.
The B horizon has hue of 5YR, 7.5YR or 10YR, value of 3 or 4 moist and 4 through 6 dry, and chroma of 3 or 4 moist or dry. It is loam, clay loam, or gravelly loam.
COMPETING SERIES: There are no competing series. Related and similar soils include the Debenger, Kerby, and Chehulpum soils. The Debenger and Kerby soils are deeper than 20 inches to bedrock. Chehulpum soils differ in having a mollic epipedon.
GEOGRAPHIC SETTING: The Brader series consists of shallow, well drained soils on hill slopes. These soils formed in colluvium from sedimentary rocks. Elevation is 700 to 3,500 feet. The mean annual precipitation is about 18 to 40 inches. The mean annual temperature is 48 to 54 degrees F. The frost-free period is 130 to 200 days. Slopes range from 1 to 60 percent.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coker, Cove, Darow, Debenger, Agate, Langellain and Carney soils. Agate soils have duripans. Carney and Coker soils are clayey and have intersecting slickensides. Cove soils are poorly drained and deep. Darow soils are clayey and moderately deep. Langellain soils are fine-loamy over clayey.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability; internal drainage medium and surface runoff slow to rapid.
USE AND VEGETATION: The soils are used for range and dry cropland. Native vegetation consists of Oregon white oak, Idaho fescue, poison oak, hairy honeysuckle and pine bluegrass.
DISTRIBUTION AND EXTENT: The soils are mainly found in the Sams Valley and Bear Creek Valleys of Jackson County, Oregon. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Jackson County Area, Oregon 1988.
ADDITIONAL DATA: Oregon State University; profile number S73 Oreg 15-2-1 and 2.