LOCATION STABLER WAEstablished Series
TAXONOMIC CLASS: Medial, amorphic, mesic Vitric Hapludands
TYPICAL PEDON: Stabler medial loam-forested. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1/2 inch; leaves, partially decomposed needles and twigs.
Oa--1/2 to 1 inch; decomposed organic material.
Ac1--1 to 3 inches; dark brown (10YR 3/3) medial loam, brown (10YR 5/3) dry; weak medium granular structure; soft, very friable, nonsticky, nonplastic and weakly smeary; many very fine and fine roots; many fine and common medium irregular pores; 15 percent shot-like aggregates (2 to 4 mm in size); moderately acid (pH 5.8); clear wavy boundary. (2 to 4 inches thick)
Ac2--3 to 10 inches; dark yellowish brown (10YR 3/4) medial loam, yellowish brown (10YR 5/4) dry; weak coarse granular structure; slightly hard, very friable, slightly sticky, nonplastic and weakly smeary; many very fine and common fine roots; many fine and common medium irregular pores; 15 percent shot-like aggregates (2 to 4 mm in size); moderately acid (pH 6.0); clear wavy boundary. (5 to 7 inches thick)
Bwc--10 to 27 inches; dark yellowish brown (10YR 3/6) medial loam, light yellowish brown (10YR 6/4) dry; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic and weakly smeary; common fine and medium roots; common fine irregular pores; 10 percent shot-like aggregates (2 to 4 mm in size); moderately acid (pH 6.0); clear smooth boundary. (10 to 18 inches thick)
Bw--27 to 38 inches; dark yellowish brown (10YR 4/6) medial loam, light yellowish brown (10YR 6/4) dry; massive; hard, firm, slightly sticky, nonplastic and weakly smeary; common fine roots; many fine irregular pores; 10 percent shot-like aggregates (2 to 4 mm in size); moderately acid (pH 6.0); clear smooth boundary. (11 to 14 inches thick)
C--38 to 61 inches; dark yellowish brown (10YR 4/6) medial sandy loam, very pale brown (10YR 7/4) dry; massive; hard, very firm, nonsticky, nonplastic and weakly smeary; few fine roots; many fine irregular pores; slightly acid (pH 6.2).
TYPE LOCATION: Skamania County, Washington; about 3 miles northwest of Stabler; 200 feet north and 1,600 feet east of the southwest corner of sec. 10, T. 4 N., R. 7E.
RANGE IN CHARACTERISTICS: The solum is 30 to 50 inches thick. These soils are usually moist and are dry for less than 45 consecutive days in the summer in all parts of the moisture control section. Mean annual soil temperature is 47 to 48 degrees F. The particle-size control section contains 0 to 2 percent coarse fragments. Apparent clay in the control section is 10 to 18 percent. The soil is moderately acid or slightly acid throughout.
The A horizon has hue of 7.5YR or 10YR, value of 2 or 3 moist, 4 or 5 dry, and chroma of 3 or 4 dry. Shot-like aggregates range from 5 to 20 percent. Organic matter is 1 to 3 percent. Sodium flouride pH is 9 to 11 percent, 15-bar water is 12 to 15 percent.
The Bw horizon has hue of 7.5YR or 10YR, value of 3 or 4 moist and 5 through 7 dry, and chroma of 4 through 6 moist and dry. It is medial loam or medial silt loam. Shot- like aggregates range from 0 to 15 percent in the upper part.
The C horizon has hue of 7.5YR or 10YR, value of 4 through 7 moist and dry, and chroma through 6 moist. It is medial loam or medial sandy loam.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Stabler soils are on high terraces and backslopes at elevations of 600 to 1,600 feet. Slopes are 0 to 65 percent. The soils formed in pyroclastic flows consisting of volcanic ash and pumice from Mt. St. Helens. Summers are warm and dry. Winters are cool and wet. Annual precipitation is 60 to 95 inches. Average January temperature is about 32 degrees F.; average July temperature is 63 degrees F.; and the annual temperature is 45 to 47 degrees F. Frost- free season ranges from 110 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the McElroy, Skamania, Stevenson, and St. Martin soils. McElroy soils are medial-skeletal. Skamania and Stevenson soils have an umbric epipedon. Also, Skamania soils are coarse-loamy. St. Martin soils have a mollic epipedon and are in a fine family.
DRAINAGE AND PERMEABILITY: Well drained; slow to rapid runoff; moderate permeability.
USE AND VEGETATION: Used mainly for timber production, pasture and tree nurseries. Vegetation is Douglas-fir, grand fir, western hemlock, red alder, western red cedar, bigleaf maple, vine maple, pacific dogwood, red huckleberry, twinflower, salal and Oregon-grape.
DISTRIBUTION AND EXTENT: Southern Washington in the Little White Salmon and Wind River Valleys of Skamania County. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Skamania County, Washington, 1947.
REMARKS: This draft refelcts a change in classification from medial, mesic Entic Dystrandepts to medial, amorphic, mesic Vitric Hapludands.
Diagnostic horizons and features recognized in this pedon are an ochric epipedon from the mineral surface to 10 inches and a cambic horizon from 10 to 38 inches, and andic soil properties from 1 to 61 inches. Andic soil properties from 1 to 61 inches with an estimated volcanic glass content of 30 to 60 percent, 15-bar moisture of 12 to 15 percent, acid oxalate aluminum plus one-half iron of 2 to 5 percent, and phosphate retention of 85 to 95 percent.
ADDITIONAL DATA: Partial laboratory data available on Ac1 and Ac2 horizons, sample numbers 78T7637 and 78T7638 for Skamania County, WA 10/4/98; Lincoln, NE.