LOCATION MAYDOL WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Ultic Haploxerolls
TYPICAL PEDON: Maydol stony loam - forested on a 10 percent south-facing slope at an elevation of 2,600 feet. (Colors are for dry soil unless otherwise stated.)
Oi--0 to 1 inch; needles and twigs.
A--1 to 6 inches; reddish brown (5YR 5/3) stony loam, dark reddish brown (5YR 3/3) moist; weak very fine granular structure; soft, friable, slightly sticky and slightly plastic; few very fine and fine roots; many very fine irregular pores; 15 percent fine gravel and 12 percent stones; neutral (pH 6.8); clear smooth boundary. (3 to 8 inches thick)
AB--6 to 14 inches; reddish brown (5YR 5/3) gravelly loam, dark reddish brown (5YR 3/3) moist; weak very fine and fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many very fine irregular pores; 15 percent gravel; neutral (pH 6.8); gradual smooth boundary. (6 to l0 inches thick)
Bw1--14 to 27 inches; reddish brown (5YR 5/3) gravelly loam, dark reddish brown (5YR 3/4) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many very fine irregular pores; 20 percent gravel; slightly acid (pH 6.4); gradual smooth boundary. (7 to 17 inches thick)
Bw2--27 to 45 inches; reddish brown (5YR 5/3) gravelly loam, dark reddish brown (5YR 3/4) moist; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common medium roots; many very fine irregular and very fine tubular pores; 20 percent gravel; slightly acid (pH 6.2); clear smooth boundary. (7 to 18 inches thick)
Bw3--45 to 61 inches; reddish brown (5YR 5/4) very gravelly loam, dark reddish brown (5YR 3/4) moist; weak fine angular and subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine and medium roots; few very fine irregular and common very fine tubular pores; 40 percent gravel; moderately acid (pH 5.8).
TYPE LOCATION: Klickitat County, Washington; about 6 miles north of Goldendale; 500 feet west of the northeast corner of section 23, T. 5 N., R. 16 E.; Latitude 45 degrees, 54 minutes, 42 seconds N. and Longitude 120 degrees, 45 minutes, and 40 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 5l degrees F. The soil moisture control section is dry in all parts for 60 to 75 consecutive days within the 4 months that follow the summer solstice in 6 or more years out of 10. Depth to bedrock is 60 inches or more. The mollic epipedon is 12 to 18 inches thick. The particle-size control section averages 18 to 25 percent clay and 15 to 30 percent rock fragments including 0 to 10 percent cobbles and stones.
The A horizon has hue of 5YR, 7.5YR or 10YR, value of 3 to 5 dry and chroma of 2 or 3 dry and moist. Reaction is slightly acid or neutral.
The Bw horizon has hue of 5YR, 7.5YR or 10YR, value of 4 or 5 dry and chroma of 3 or 4 dry. Reaction is moderately acid or slightly acid.
COMPETING SERIES: These are the
Cauley,
Laughlin,
Sharpshooter, and
Steiwer series.
Cauley soils dry for 75 to 90 consecutive days following the summer solstice
Laughlin soils 20 to 40 inches to a lithic contact (sandstone); dry for greater than 90 consecutive days following the summer solstice
Sharpshooter soils 40 to 60 inches to a paralithic contact (mica schist); dry for 45 to 60 consecutive days following the summer solstice
Steiwer soils 20 to 40 inches to a paralithic contact (shale and sandstone); dry for 45 to 60 consecutive days following the summer solstice
GEOGRAPHIC SETTING: Maydol soils are on plateaus at elevations of 2,000 to 3,200 feet. Slopes are 5 to 30 percent. The soils formed in colluvium and residuum derived from Simcoe or Yakima basalt mixed with loess and minor amounts of volcanic ash in the surface. Summers are warm and dry and winters are cool and moist. The mean annual precipitation is 22 to 27 inches. The average January temperature is 27 degrees F. and the average July temperature is 64 degrees F. The mean annual temperature is 45 to 48 degrees F. The frost-free season is 100 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Lyville, Nook, Presher, Rockly, Satus, and Suta soils. Lyville, Satus and Suta soils are loamy-skeletal. Nook soils have a mollic epipedon more than 20 inches thick. Presher soils are frigid. Rockly soils are shallow to basalt. Lyville and Suta soils are on canyon side slopes. Nook soils are on alluvial fans and terraces. Presher soils are on plateaus and footslopes of mountains. Rockly soils are on plateaus, canyon slopes, and hillslopes. Satus soils are on mountain slopes.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used mainly for timber production and grazable woodland. Vegetation is mainly Douglas-fir, ponderosa pine and Oregon white oak with an understory of snowbrush ceanothus, bitterbrush, kinnikinnick, common snowberry, and elk sedge.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in south-central Washington; MLRA 6. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 1 to 14 inches
Cambic horizon - the zone from 14 to 61 inches
Particle-size control section - the zone from 11 to 41 inches
Depth to diagnostic horizons and features are measured from the top of the first mineral layer.
The Oi horizon was originally described as 0.5 inches thick. The depth was increased to 1 inch for simplicity of horizon measurement.