LOCATION SKANID WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic, shallow Vitrandic Haploxerolls
TYPICAL PEDON: Skanid ashy loam, woodland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 6 inches; grayish brown (10YR 5/2) ashy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; many fine roots; many fine pores; 10 percent pebbles; neutral (pH 6.6); clear wavy boundary.
A2--6 to 10 inches; brown (10YR 5/3) gravelly ashy loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common fine roots; common fine pores; 20 percent pebbles; neutral (pH 6.8); clear wavy boundary. (combined thickness of the A horizon is 7 to 10 inches)
C--10 to 15 inches; pale brown (10YR 6/3) very gravelly coarse sandy loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, slightly sticky and nonplastic; few fine roots; few fine pores; 40 percent gravel; neutral (pH 6.8); abrupt wavy boundary. (3 to 10 inches thick)
Cr--15 inches; weathered granite.
TYPE LOCATION: Stevens County, Washington; about 2 miles east of Long Lake Dam; 1,200 feet south and 1,400 feet west of the NE corner section 16 , T.27N., R.40E., WM.
RANGE IN CHARACTERISTICS: Depth to a paralithic contact is 10 to 20 inches. These soils are usually moist but are dry in all parts above the paralithic contact for 75 to 90 days following the summer solstice. The mean annual soil temperature is about 47 to 52 degrees F. The soil has 10 to 55 percent pebbles but has more than 35 percent in the control section. Reaction is moderately acid, slightly acid, or neutral.
The A horizon has value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3 dry and 1 through 3 moist. The lower part of the A horizon is gravelly ashy loam or gravelly ashy sandy loam. Pebble content is 10 to 30 percent. It has base saturation of 75 percent or less in some or all parts and cobble content is 0 to 5 percent. Estimated volcanic glass content is 5 to 20 percent and estimated acid oxalate extractable Al + 1/2 Fe is .4 to 1 percent.
The C horizon has hue of 10YR or 2.5Y, value of 5 through 7 dry and 3 through 5 moist, and chroma of 3 or 4 dry or moist. It is very gravelly loam, very gravelly sandy loam or very gravelly coarse sandy loam. It is 35 to 55 percent pebbles and 0 to 5 percent cobbles.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Skanid soils are on granitic uplands at elevations of 1,700 to 4,200 feet. Slopes are 0 to 65 percent. These soils formed in residuum from granite with a component of volcanic ash and loess. The climate is warm, dry summers and cool, moist winters. Mean annual precipitation is 15 to 24 inches. The average January temperature is about 24 degrees F.; the average July temperature is about 65 degrees F.; and the mean annual temperature is 46 to 48 degrees F. The frost free season is about 100 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dragoon, Hartill, Mobate, Moscow, Spokane and Raisio soils. Dragoon, Hartill, Moscow, Spokane and Raisio soils are 20 to 40 inches in depth. Mobate soils are frigid.
DRAINAGE AND PERMEABILITY: Well drained; slow to very rapid runoff; moderate to moderately rapid permeability.
USE AND VEGETATION: Used mainly for grazed woodland. Vegetation is ponderosa pine and Douglas-fir, with an understory of bluebunch wheatgrass, Idaho fescue, pinegrass, rose, common snowberry, yarrow, and redstem ceanothus. Antelope bitterbrush, ponderosa pine, Idaho fescue, and bluebunch wheatgrass are on warm phases.
DISTRIBUTION AND EXTENT: Granitic areas of northeastern Washington. The series is moderate in extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Stevens County, Washington, 1978.
REMARKS: Diagnostic horizons and features recognized in this soil are mollic epipedon from the surface to 10 inches and a paralithic contact at 15 inches.