LOCATION LEADER WAInactive Series
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, isotic, mesic Vitrandic Haploxerepts
TYPICAL PEDON: Leader ashy fine sandy loam, woodland. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 1 inch; slightly decomposed needles and twigs.
A--1 to 5 inches; grayish brown (10YR 5/2) ashy fine sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium granular structure; soft, very friable, slightly sticky and nonplastic; many roots; slightly acid (pH 6.5); clear smooth boundary. (4 to 6 inches thick)
Bw1--5 to 13 inches; pale brown (10YR 6/3) ashy fine sandy loam, dark brown (10YR 3/3) moist; weak medium prismatic structure; soft, very friable, nonsticky and nonplastic; many roots; many fine pores; slightly acid (pH 6.4); clear smooth boundary. (6 to 8 inches thick)
Bw2--13 to 25 inches; very pale brown (10YR 7/3) ashy fine sandy loam, brown (10YR 4/3) moist; weak medium prismatic structure; soft, very friable, nonsticky and nonplastic; many roots; many fine pores; neutral (pH 6.6); clear smooth boundary. (10 to 13 inches thick)
2C1--25 to 39 inches; very pale brown (10YR 8/2) loamy fine sand, grayish brown (10YR 5/2) moist; massive; soft, very friable, nonsticky and nonplastic; common roots; many fine and few medium pores; neutral (pH 6.8); clear wavy boundary. (12 to 15 inches thick)
2C2--39 to 61 inches; pale yellow (2.5Y 8/2) fine sand, light brownish gray (2.5Y 6/2) moist; common fine faint brownish yellow (10YR 6/6) relict redox concentrations; single grained; loose, nonsticky and nonplastic; few roots; neutral (pH 6.9).
TYPE LOCATION: Okanogan County, Washington; 350 feet south and 200 feet east of the NW corner of the SW1/4 SE1/4 sec. 26, T.35N., R.28E. (Latitude 48 degrees, 30 minutes, 1.68 seconds north, Longitude 119 degrees, 17 minutes, 54.54 seconds west).
RANGE IN CHARACTERISTICS:
Soil temperature: mean annual soil temperature is 47 to 52 degrees F.
Rock fragments: 0 to 10 percent throughout the profile
Vitrandic properties:. The upper 20 to 27 inches of the solum has an estimated moist bulk density of 1.20 to 1.40 g/cc, volcanic glass content of 5 to 20 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 0.4 to 1.0 percent, and 15-bar water retention of 5 to 12 percent for air dried samples.
Depth to the sandy substratum material (2C horizons): 20 to 27 inches.
Reaction: slightly acid or neutral.
A horizon
Value: 4 through 6 dry, 2 through 4 moist
Texture: ashy fine sandy loam
Bw horizon
Value: 6 or 7 dry, 3 or 4 moist
Texture: ashy fine sandy loam
2C horizon
Hue: 10YR or 2.5Y
Value: 7 or 8 dry, 5 or 6 moist
Texture: loamy fine sand to fine sand
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Leader soils are on outwash terraces. Slope ranges from 0 to 45 percent. Leader soils formed in mixed volcanic ash over glaciofluvial deposits. Elevations are 2,000 to 3,500 feet. The climate is characterized by warm, dry summers and cool, moist winters. The mean annual precipitation is 14 to 16 inches. The mean annual air temperature is 48 to 51 degrees F. The frost-free season is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Donovan, Kartar, and Leiko soils. Donovan soils have a mollic epipedon, a frigid temperature and are moderately deep to a densic contact. Kartar soils are coarse-loamy and have sandy or sandy-skeletal material at depths of 40 to over 60 inches. Leiko soils have a mollic epipedon, are sandy-skeletal and have a mixed ash mantle 7 to 14 inches thick.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; slow to medium runoff; moderately rapid permeability.
USE AND VEGETATION: Hay and pasture and grazed woodland are its main uses. The native vegetation is ponderosa pine, Douglas-fir, bluebunch wheatgrass, balsamroot and junegrass.
DISTRIBUTION AND EXTENT: North-central Washington; MLRA 6. The soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Okanogan County, Washington, 1972.
REMARKS: Diagnostic horizons and other features are:
Ochric epipedon
Cambic horizon; from 5 to 25 inches
Vitrandic properties; from 1 to 25 inches
Contrasting particle-size class; 11 to 25 inches-coarse-loamy and from 25 to 41 inches-sandy.