LOCATION WILDER WAEstablished Series
TAXONOMIC CLASS: Sandy, isotic, frigid Vitrandic Haploxerolls
TYPICAL PEDON: Wilder ashy sandy loam, forestland on a 46 percent west-facing slope at an elevation of 3440 feet, in a Douglas-fir, ponderosa pine forest. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
Oe--0 to 1 inch; moderately decomposed needles, grasses. (0 to 2 inches thick)
A1--1 to 7 inches; grayish brown (10YR 5/2) ashy sandy loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure parting to moderate fine and medium granular; soft, very friable, nonsticky and nonplastic; many very fine and few fine roots; common fine irregular pores; 2 percent gravel; neutral (pH 6.8); clear smooth boundary.
A2--7 to 11 inches; grayish brown (10YR 5/2) ashy sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic, common very fine and few fine roots; common fine irregular pores; 4 percent gravel; neutral (pH 6.8); clear smooth boundary. (combined A horizon 10 to 20 inches thick)
Bw--11 to 16 inches; yellowish brown (10YR 5/4) ashy sandy loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine roots; common irregular pores; 7 percent gravel; neutral (pH 6.8); clear smooth boundary. (4 to 10 inches thick)
2BC--16 to 22 inches; pale brown (10YR 6/3) loamy sand; dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; common very fine and few fine roots; common fine and medium irregular pores; 10 percent gravel; neutral (pH 6.8); gradual smooth boundary. (0 to 25 inches thick)
2C1--22 to 40 inches; pale brown (10YR 6/3) gravelly loamy sand, dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; few fine and very fine roots; common fine and medium irregular pores; 30 percent gravel; neutral (pH 6.8); gradual smooth boundary.
2C2--40 to 61 inches; pale brown (10YR 6/3) sand; dark grayish brown (10YR 4/2) moist; single grain; loose, nonsticky and nonplastic; few very fine, fine, and medium roots; common medium irregular pores; 8 percent gravel; neutral (pH 6.8). (combined C horizon is 25 to 50 inches thick)
TYPE LOCATION: Okanogan County, Washington; about 4 miles west of Conconully, WA, about 1300 feet west and 2600 feet south of the northeast corner of section 5, T. 35 N., R. 24 E.; Latitude 48 degrees, 33 minutes, 42 seconds N., Longitude 119 degrees, 50 minutes, 47 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 42 to 46 degrees F. These soils are usually moist, but are dry in all parts of the moisture control section for 60 to 75 consecutive days following the summer solstice. The mollic epipedon is 10 to 20 inches thick. The particle-size control section averages 5 to 20 percent rock fragments. The upper 14 to 20 inches of the solum has and estimated moist bulk density of 1.20 to 1.55 g/cc, volcanic glass content of 5 to 20 percent, acid-oxalate extractable aluminum plus one-half of the 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 10 percent for air dried samples.
The A horizon has a value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 through 3, dry or moist.
The Bw horizon has a value of 5 or 6 dry, 3 or 4 moist, and chroma of 3 or 4 dry or moist. It is ashy sandy loam or ashy fine sandy loam. It has 0 to 10 percent gravel.
The 2C horizon has a value of 6 or 7 dry, 4 through 6 moist, and chroma of 2 through 4 dry or moist. The texture is sand, loamy sand, loamy coarse sand, or gravelly loamy coarse sand. It has 5 to 30 percent gravel.
COMPETING SERIES: This is the Packerjohn (T) series. Packerjohn soils are dry for 45 to 60 consecutive days.
GEOGRAPHIC SETTING: Wilder soils are on backslopes and terrace escarpments and have slopes of 35 to 65 percent. These soils formed in glaciofluvial deposits with a component of volcanic ash in the upper part. Elevations are from 2,500 to 3,410 feet. These soils are in a xeric climate with hot dry summers and cool moist winters. Average annual precipitation ranges from 17 to 20 inches. Average January temperature ranges from 22 to 26 degrees F., the average July temperature ranges from 62 to 67 degrees F., and the average annual temperature is 40 to 43 degrees F. The frost-free season is 90 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Myerscreek, Republic, and Scheiner soils. Myerscreek soils are on backslopes, footslopes, and toeslopes of mountains and are loamy-skeletal and cryic. Republic soils are on terraces, footslopes, and backslopes of mountains and are coarse-loamy. Scheiner soils are on terraces and sideslopes of drainageways and are cryic.
DRAINAGE AND PERMEABILITY: Well drained, medium runoff, rapid permeability.
USE AND VEGETATION: Used for timber production, livestock grazing, wildlife habitat, recreation, and watershed. Native vegetation is Douglas-fir, ponderosa pine, pinegrass, beardless wheatgrass, common yarrow, arrowleaf balsamroot, eriogonum, and shinyleaf spirea.
DISTRIBUTION AND EXTENT: Okanogan County, Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Okanogan County, Washington, Okanogan National Forest, 2005.
REMARKS: Diagnostic horizons and features recognized in this soil include:
Mollic epipedon - 1 to 11 inches (A1 and A2 horizons)
Vitrandic zone - 1 to 16 inches
The Bw horizon in the model pedon is not thick enough to qualify as cambic, but many pedons do have a cambic horizon.