LOCATION RACING OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, nonacid Aquandic Cryaquepts
TYPICAL PEDON: Racing ashy sandy loam - on a 1 percent slope. (Colors are for moist soil unless otherwise noted.)
Oi-0 to 3 inches; organic layer of needles and twigs.
A-3 to 10 inches; dark brown (7.5YR 3/2) ashy sandy loam, brown (7.5YR 5/4) dry; common distinct strong brown (7.5YR 5/6) mottles; weak medium granular structure; soft, friable, nonsticky and nonplastic; many very fine, fine, medium and coarse roots; many very fine, fine, medium and coarse irregular pores; moderately acid (pH 5.8); clear smooth boundary. (7 to 10 inches thick)
Oa-10 to 14 inches; black (N 2/0) rubbed and pressed muck, very dark gray (7.5YR 3/1) dry; about 40 percent fibers, 5 percent rubbed; weak medium platy structure; very friable, nonsticky and nonplastic; many very fine, fine, medium and coarse roots; moderately acid (pH 5.8); clear smooth boundary. (0 to 4 inches thick)
Bg1--14 to 19 inches; dark gray (10YR 4/1) silt loam, light brownish gray (10YR 6/2) dry; common distinct dark yellowish brown (10YR 4/6) and yellowish brown (10YR 5/4) redox concentrations; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine and few medium and coarse roots; common very fine, fine and few medium tubular pores; common faint organic coatings on faces of peds and lining pores; 5 percent gravel; moderately acid (pH 5.6); clear smooth boundary.
Bg2--19 to 25 inches; light brownish gray (10YR 6/2) silty clay loam, white (10YR 8/1) dry; many distinct yellowish brown (10YR 5/6) redox concentrtions; strong coarse subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common very fine, fine and few medium roots; common very fine, fine and few medium tubular pores; moderately acid (pH 5.6); clear smooth boundary. (combined thickness of the Bg horizon is 8 to 20 inches)
2Bg3--25 to 33 inches; light brownish gray (10YR 6/2) very gravelly clay loam, light gray (10YR 7/1) dry; many distinct dark yellowish brown (10YR 4/6) mottles; moderate medium subangular blocky structure; very hard, very firm, sticky and plastic; few very fine and fine roots; few very fine and fine tubular pores; 40 percent gravel; moderately acid (pH 5.6); gradual wavy boundary.
2Bg4--33 to 44 inches; light brownish gray (10YR 6/2) extremely gravelly loam, light gray (10YR 7/2) dry; many distinct dark yellowish brown (10YR 4/6) redox concentrations; weak medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; 60 percent gravel; moderately acid (pH 5.6); clear wavy boundary. (combined thickness of 2Bg horizon is 16 to 22 inches)
3Bq--44 to 54 inches; grayish brown (10YR 5/2) extremely gravelly sand, very pale brown (10YR 7/3) dry; many distinct dark yellowish brown (10YR 4/6) redox concentrations; discontinuous weak cementation with iron; massive; very hard, very firm, nonsticky and nonplastic; 80 percent gravel; 20 percent iron-manganese concretions; moderately acid (pH 5.6); clear wavy boundary. (8 to 10 inches thick)
3Cg--54 to 63 inches; grayish brown (10YR 5/2) very gravelly sandy loam, light gray (10YR 7/1) dry; many distinct dark yellowish brown (10YR 4/6) redox concentrations; massive; hard, firm, slightly sticky and slightly plastic; 50 percent gravel; moderately acid (pH 5.6).
TYPE LOCATION: Jefferson County, Oregon, about 2000 feet west and 500 feet north of the SE corner of section 8, T.9 S., R.9 E. (Warm Springs Indian Reservation). (Latitude 44 degrees, 47 minutes, 53 seconds N, Longitude 121 degrees, 41 minutes, 8 seconds E)
RANGE IN CHARACTERISTICS: These soils are usually saturated with water throughout the year. The mean annual soil temperature is 36 to 38 degrees F. Depth to the discontinuous weak cementation layer (3Bq horizon) is 40 to 60 inches. Depth to bedrock is greater than 60 inches. The particle-size control section averages 20 to 30 percent clay, more than 15 percent fine sand and coarser, and less than 35 percent total rock fragments. It has redox concentrations throughout.
The A horizon has value of 2 or 3 moist, 3 through 5 dry and chroma of 2 or 3 moist and 3 or 4 dry. It has a moist bulk density of 0.80 to 0.90 g/cc, P-retention of more than 85 percent, and acid oxalate extractable aluminum plus one-half iron of 3 to 5 percent.
The Oa horizon, when present, has value of 2 or 3 moist and dry and chroma of 0 through 2 moist and dry.
The Bg horizon has value of 4 through 6 moist, 6 through 8 dry and chroma of 1 or 2 moist and dry. It is silt loam or silty clay loam with 0 to 5 percent gravel.
The 2Bg horizon has value of 5 or 6 moist, 7 or 8 dry and chroma of 1 or 2 moist and dry. It is very gravelly clay loam, very gravelly loam, or extremely gravelly loam and contains 35 to 80 percent gravel.
The 3Bq horizon has value of 5 or 6 moist, 7 or 8 dry and chroma of 1 or 2 moist and 2 or 3 dry. It contains 60 to 85 percent gravel. It has 15 to 25 percent iron-manganese concretions.
The 3Cg horizon has value of 5 or 6 moist, 7 or 8 dry and chroma of 1 or 2 moist and dry. It is very gravelly sandy loam, extremely gravelly sandy loam, or very gravelly loam and contains 35 to 80 percent gravel.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Racing soils are in mountain basins. Elevations are 3,000 to 5,500 feet. Slopes are 0 to 3 percent. The soil formed in mixed ash and alluvium derived from mixed sources. The mean annual precipitation is 50 to 110 inches. The mean annual temperature is 34 to 40 degrees F. The frost-free period is 10 to 30 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Belrick, Douthit, Jojo, Mariel and Pinhead soils. Belrick soils are on moraines, ashy and well drained. Douthit soils are on moraines, ashy-skeletal and well drained. Jojo and Pinhead soils are on adjacent side slopes, medial-skeletal and somewhat excessively drained. Mariel soils are very poorly drained and composed of organic material.
DRAINAGE AND PERMEABILITY: Poorly drained. Permeability is moderate in the upper part of the solum, very slow in the 3Cg1 horizon, and moderately rapid below. It has a high water table from 1 foot above to 1 foot below the surface from April to June.
USE AND VEGETATION: These soils are used for watershed and wildlife habitat. The native vegetation is Engelmann spruce and lodgepole pine, with and understory of rushes and sedges.
DISTRIBUTION AND EXTENT: North-central Oregon; MLRA 3. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Warm Springs Indian Reservation, Jefferson County, Oregon, 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon
Aquic feature - redox concentrations throughout with saturation to the surface for most of the year. Chroma is 2 or less from 3 to 44 inches (A, Bg1, Bg2, 2Bg3, and 2Bg4 horizons)
Cambic horizon - from 14 to 44 inches (Bg1, Bg2, 2Bg3, and 2Bg4 horizons)
Particle-size control section - from 14 to 43 inches (Bg1, Bg2, 2Bg3, and 2Bg4 horizons) with 33 percent rock fragments calculated as a weighted average.
Andic feature - from 3 to 10 inches (A horizon)
ADDITIONAL DATA: Partial laboratory data is available for this soil. Reference pedon # 91P256, Warm Springs Reservation Soil Survey; NSSL, Lincoln, NE, 5/91.