LOCATION PEOH WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Cumulic Endoaquolls
TYPICAL PEDON: Peoh silt loam, grazing land. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 6 inches; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, very friable, slightly sticky, slightly plastic; many fine fibrous roots; few fine tubular pores; slightly acid (pH 6.2); gradual smooth boundary. (4 to 8 inches thick)
A12--6 to 16 inches; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; many fine fibrous roots; few fine tubular pores; neutral (pH 6.6); abrupt wavy boundary. (8 to 12 inches thick)
B2g--16 to 32 inches; grayish brown (10YR 5/2) clay loam, very dark grayish brown (10YR 3/2) moist; common medium distinct dark yellowish brown (10YR 4/4) mottles; massive; hard, friable, sticky, plastic; few fine fibrous roots; few fine tubular pores; neutral (pH 7.2); gradual wavy boundary. (12 to 20 inches thick)
C--32 to 60 inches; grayish brown (10YR 5/2) sandy clay loam,
grayish brown (10YR 5/2) moist; common medium distinct dark yellowish brown (10YR 4/4) and gray (N 5/) mottles; massive; hard, friable, sticky, plastic; few roots; few fine tubular pores; neutral (pH 7.2).
TYPE LOCATION: Chelan County, Washington; 50 feet east of road in field; 0.5 mile north of Leavenworth in NW1/4 SE1/4 section 1, T.24N., R.17E.
RANGE IN CHARACTERISTICS: The solum ranges from 24 to 40 inches thick. The mean annual temperature at depth of 20 inches is about 48 degrees F. These soils are saturated with water at some period during the year. The control section contains less than 10 percent coarse fragments and is dominantly clay loam and sandy clay loam. The soils are slightly acid to neutral becoming less acid with depth. The mollic epipedon is 24 to 36 inches thick.
The A horizon have value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 or 2 dry or moist. It has weak granular or blocky structure.
The B2g horizon has value of 5 or 6 dry, 3 or 4 moist, and chroma of 1 or 2 dry or moist, and is mottled. It is clay loam or sandy clay loam. The B2g horizon has weak structure and is massive.
The C horizon has hue of 10YR or 2.5Y, value of 5 or 6 dry, 4 or 5 moist, and chroma of 1 or 2 dry or moist and is mottled. It is sandy clay loam or clay loam.
COMPETING SERIES: These are the Coland, Comfrey, Glencoe, Jame Canyon, Kimmerling, McClave, and Wernas soils. Coland soils have mollic epipedons more than 36 inches thick and have 15 to 30 percent fine sand or coarser in the control section. Comfrey soils have mildly to moderately alkaline C horizons that contain free carbonate. Glencoe soils have hue of 5Y or 2.5Y in the B horizon. James Canyon soils have gravelly control sections. Kimmerling soils have 5Y hue in the control section. McClave soils lack a significant component of volcanic ash in the upper part of the control section. Wenas soils overlie loose, gravelly alluvium at moderate depths.
GEOGRAPHIC SETTING: These soils occupy nearly level and gently sloping meadowlike areas in the uplands; slope gradients range from 0 to 8 percent. Peoh soils formed in mixed alluvium. There is some loess and volcanic ash mixed in the surface layer of the soils and this overlies older heavier textured alluvium. The soils occur at elevations of 800 to 1,500 feet in a subhumid climate; the mean annual temperature is 46 to 50 degrees F.; the average annual precipitation is 15 to 25 inches; and the frost free season is 130 to 165 days.
PRINCIPAL ASSOCIATED SOILS: These are the Leavenworth and Brief soils. Both of these soils are well drained.
DRAINAGE AND PERMEABILITY: Poorly drained; slow runoff or ponded; moderately slow to slow permeability.
USE AND VEGETATION: Primarily for pasture and hay. Native vegetation is willow, alder, Douglas fir, grasses, and sedges.
DISTRIBUTION AND EXTENT: North central Washington. Peoh soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Kittitas County, Washington, 1936.
REMARKS: These soils would have been classified as Humic Gley soils.