LOCATION GLASGOW OR+ID NVEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Xeric Haplargids
TYPICAL PEDON: Glasgow silt loam - on a 2 percent slope in a cultivated field. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 6 inches; light brownish gray (10YR 6/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak thin and medium platy structure parting to moderate fine granular; soft, friable, slightly sticky and slightly plastic; many very fine and fine roots; many medium vesicular and very fine tubular pores; neutral (pH 6.6); clear smooth boundary. (3 to 8 inches thick)
A--6 to 12 inches; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; common very fine tubular pores; neutral (pH 6.7); clear wavy boundary. (2 to 8 inches thick)
2Bt--12 to 16 inches; brown (10YR 5/3) clay, dark brown (10YR 3/3) moist; strong medium prismatic structure parting to moderate fine and medium subangular blocky; hard, firm, very sticky and very plastic; few fine roots; common fine tubular pores; continuous thin clay films on faces of peds and in pores; neutral (pH 7.3); clear wavy boundary. (4 to 10 inches thick)
2Btk--16 to 24 inches; light yellowish brown (10YR 6/4) clay loam, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; hard, firm, sticky and plastic; few fine roots; common fine tubular pores; continuous thick clay films on faces of peds and in pores; strongly effervescent; lime segregated in common fine irregularly shaped seams; few chips of volcanic tuff; moderately alkaline (pH 8.3); abrupt wavy boundary. (8 to 14 inches thick)
3R--24 inches; fractured volcanic tuff.
TYPE LOCATION: Baker County, Oregon; located 150 feet southeast of Sparta Road, 100 feet northeast of field boundary in the NW1/4NW1/4 sec. 26, T. 8 S., R. 43 E.
RANGE IN CHARACTERISTICS: The thickness of the solum and the depth to bedrock is 20 to 40 inches. The mean annual soil temperature is 49 to 53 degrees F. The soil is dry throughout from about June through October. The soil is above 41 degrees F from about April through October.
The A horizon has hue of 10YR, value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 or 3 moist and dry. It is silt loam or clay loam with 15 to 40 percent clay. It has 1 to 2 percent organic matter.
The 2Bt horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry and 3 or 4 moist, and chroma of 3 or 4 moist and dry. It is clay or clay loam, averaging 35 to 55 percent clay. It has moderate and strong prismatic structure parting to weak and moderate subangular blocky. It is neutral to mildly alkaline.
The 2Btk horizon has hue of 10YR or 2.5Y, value of 6 or 7 dry and 4 moist, and chroma of 3 or 4 moist and dry. It is clay loam or clay, averaging 35 to 45 percent clay. It is weakly to strongly effervescent. It is mildly or moderately alkaline.
A 2Crk or 2Ck horizon up to 12 inches thick occurs over the bedrock in some pedons. It is loam or clay loam averaging 20 to 35 percent clay.
COMPETING SERIES: These are the Farmell(T), Lanktree, Oppio, Risley, Schamp and Trunk soils. Farmell, Lanktree and Schamp soils are deeper than 40 inches to bedrock. Oppio soils lack secondary lime and the influence of volcanic ash on the surface. Risley soils have a paralithic contact at depths between 20 and 30 inches. Trunk soils have 15 to 35 percent rock fragments in the Bt horizon.
GEOGRAPHIC SETTING: Glasgow soils are on hills. Slopes range from 2 to 60 percent. Elevation ranges from 2,300 to 4,000 feet. The soils formed in colluvium and residuum from volcanic tuff with an influence of loess and volcanic ash in the upper part. The climate is characterized by cool moist winters and hot dry summers. The mean annual temperature ranges from 47 to 53 degrees F. The mean annual precipitation ranges from 10 to 14 inches. The frost-free period is 90 to 145 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brownscombe, Lookout, Ruckles and Virtue series. Brownscombe soils are fine-textured in the control section. Lookout and Virtue soils have duripans. Ruckles soils have a lithic contact at depths of less than 20 inches and are skeletal.
DRAINAGE AND PERMEABILITY: Well drained; slow permeability.
USE AND VEGETATION: Glasgow soils are used for rangeland. The native vegetation is bluebunch wheatgrass, Idaho fescue, Sandberg bluegrass and Wyoming big sagebrush.
DISTRIBUTION AND EXTENT: Northeastern Oregon and parts of Idaho; MLRA 10. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Baker County Area, Oregon; 1942.
REMARKS: Diagnostic horizons recognized in this pedon are:
Argillic horizon - the zone from approximately 12 to 24 inches (Bt, Btk horizons).
NSTH 17, RECLASSIFICATION ONLY, 3/95