LOCATION YEARY WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, isotic, mesic Andic Oxyaquic Haploxerepts
TYPICAL PEDON: Yeary gravelly medial loam, forested. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1 inch; slightly decomposed needles, leaves and twigs.
Oe--1 to 2 inches; moderately decomposed needles, leaves, and twigs.
A--2 to 9 inches; dark brown (10YR 4/3) gravelly medial loam, very pale brown (10YR 7/3) dry; weak very fine subangular blocky structure and weak fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine, and common medium roots; many fine and very fine irregular and tubular pores; 15 percent pebbles; moderately acid (pH 6.0); abrupt smooth boundary. (2 to 7 inches thick)
AB--9 to 15 inches; yellowish brown (10YR 5/4) gravelly medial loam, very pale brown (10YR 7/3) dry; few fine distinct yellowish brown (10YR 5/6) redox concentrations, brownish yellow (10YR 6/6) dry; weak fine and very fine angular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and very fine roots; common very fine irregular, and few fine and very fine tubular pores; 20 percent gravel; moderately acid (pH 6.0); clear smooth boundary. (5 to 12 inches thick)
Bw1--15 to 21 inches; yellowish brown (10YR 5/4) gravelly clay loam, very pale brown (10YR 7/3) dry; few fine distinct dark yellowish brown (10YR 4/6) redox concentrations, brownish yellow (10YR 6/6) dry; weak very fine, fine, and medium angular blocky structure; hard, firm, moderately sticky and moderately plastic; few fine and very fine roots; common very fine irregular pores and few fine and very fine tubular pores; 20 percent gravel, moderately acid (pH 6.0); clear smooth boundary. (3 to 8 inches thick)
Bw2--21 to 31 inches; yellowish brown (10YR 5/4) gravelly clay loam, very pale brown (10YR 7/3) dry; common medium distinct dark yellowish brown (10YR 4/4) redox concentrations; light yellowish brown (10YR 6/4) dry; moderate medium, fine and very fine angular blocky structure; very hard, firm, moderately sticky and moderately plastic; very few fine and very fine roots; common very fine irregular, and few very fine tubular pores; 15 percent pebbles; moderately acid (pH 5.6); gradual smooth boundary. (6 to 10 inches thick)
Bw3--31 to 40 inches; yellowish brown (10YR 5/4) gravelly clay loam, very pale brown (10YR 7/3) dry; common medium distinct dark yellowish brown (10YR 4/6) redox concentrations, brownish yellow (10YR 6/6) dry; weak medium and fine angular blocky structure; very hard, firm, moderately sticky and moderately plastic; very few fine and very fine roots; few very fine irregular and tubular pores; 15 percent pebbles; moderately acid (pH 6.0); clear smooth boundary. (0 to 9 inches thick)
Cd--40 to 62 inches; olive brown (2.5YR 4/4) dense glacial till that crushes to loam, light yellowish brown (2.5Y 6/4) dry; massive; very hard, firm, slightly sticky and slightly plastic; few very fine irregular pores; 5 percent pebbles; slightly acid (pH 6.4).
TYPE LOCATION: Clallam County, Washington; 100 feet east of Palo Alto Road; 1,700 feet north and 1,700 feet west of the southeast corner of section 16, T.29N., R.3W.
RANGE IN CHARACTERISTICS: Depth to the densic material consisting of very compact glacial till is 20 to 40 inches. The particle size control section is 5 to 20 percent pebbles and cobbles and 18 to 35 percent clay. The mean annual soil temperature is 50 to 53 degrees F. The soil is dry in the moisture control section for 60 to 75 consecutive days following summer solstice. There is a perched water table above the densic layer from January to April; (oxyaquic).
The A and AB horizon has value of 3 or 4 moist, 6 or 7 dry, and chroma of 2 or 3. This horizon has granular or subangular blocky structure. It is slightly acid or strongly acid. It has bulk density moist of 0.80 to 1.00 g/cc. Acid oxalate aluminum plus one-half the acid oxalate iron is 1.0 to 2.5 percent.
The B horizon has hue of 10YR or 2.5Y, value of 4 through 6 moist, 6 or 7 dry, and chroma of 2 through 4. It is loam, gravelly loam, clay loam or gravelly clay loam. This horizon has angular blocky or subangular blocky structure. It is slightly acid to strongly acid. It has very few, faint clay films lining pores and on faces of peds in some pedons.
The Cd horizon has hue of 10YR or 2.5Y, value of 4 through 6 moist, 6 or 7 dry, and chroma of 2 through 4. It is dense glacial till that crushes to loam, gravelly loam, clay loam, or gravelly clay loam. It is slightly acid or neutral.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Yeary soils are on glaciated uplands at elevations of 200 to 1,500 feet. Slopes are 0 to 35 percent. They formed in reworked marine sediments over dense very compact glacial till. The soils are in a mild marine climate with cool, dry summers and cool, moist winters. The mean annual precipitation is 20 to 35 inches. The average January temperature is about 37 degrees F.; the average July temperature is about 59 degrees F.; and the mean annual temperature is about 49 degrees F. The frost free season is 160 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clallam, Elwha, Hoypus and Louella soils. Clallam soils are loamy-skeletal. Elwha soils are coarse-loamy. Hoypus soils are sandy-skeletal. Louella soils are coarse-loamy.
DRAINAGE AND PERMEABILITY: Moderately well drained; medium runoff; moderately slow permeability above the densic contact.
USE AND VEGETATION: Timer production, cropland, pasture and wildlife habitat are the principal uses. Native vegetation is predominantly Douglas fir with some grand fir, western red cedar, western hemlock, Pacific madrone and bigleaf maple. The understory species includes salal, oceanspray, red huckleberry, twinflower, Oregon grape, rose, blackberry, western swordfern and brachenfern. Principal crop is grass and legume hay.
DISTRIBUTION AND EXTENT: Eastern Clallam County, Washington. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 1979.
REMARKS: Diagnostic horizons and other features are:
Ochric epipedon
Cambic horizon - 15 to 40 inches
Andic subgroup - 2 to 15 inches (range of thickness is 7 to 14 inches)
Perched water table above densic material - oxyaquic conditions
Particle-size control section is 12 to 40 inches
All depths to diagnostic horizons and other features are measured from the to of the first mineral horizon.