LOCATION WAHOO WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Ultic Argixerolls
TYPICAL PEDON: Wahoo stony clay loam - rangeland on an 11 percent south-facing slope at an elevation of 2,150 feet. (Colors are for dry soil unless otherwise noted.)
A--0 to 5 inch; brown (7.5YR 5/4) stony clay loam, dark brown (7.5YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine irregular pores; 15 percent gravel and 15 percent stones; slightly acid (pH 6.4); clear smooth boundary. (1 to 7 inches thick)
Bt--5 to 12 inches; brown (7.5YR 4/4) extremely stony clay loam, dark brown (7.5YR 3/2) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine irregular and few very fine tubular pores; 30 percent gravel; 20 percent cobbles and 20 percent stones; common prominent clay films on ped faces and in pores; slightly acid pH 6.2); abrupt wavy boundary. (5 to 13 inches thick)
R--12 inches; basalt.
TYPE LOCATION: Klickitat County, Washington; about 13 miles northwest of Goldendale; 800 feet north and 2,000 feet east of the southwest corner, section 5, T. 5 N., R. 14 E. (Latitude 45 degrees, 56 minutes, 40 seconds N. and Longitude 121 degrees, 05 minutes, 00 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 50 degrees F. The soil moisture control section is dry in all parts for 90 to 105 consecutive days within the 4 months that follow the summer solstice in 6 or more years out of 10. Depth to bedrock is 10 to 20 inches. Thickness of the mollic epipedon is 7 to 20 inches. Reaction is slightly acid or moderately acid throughout.
The A horizon has hue of 5YR or 7.5YR, value of 4 or 5 dry, and chroma of 3 or 4 dry, 2 or 3 moist.
The Bt horizon has hue of 7.5YR or 10YR, value of 4 or 5 dry and chroma of 3 or 4 dry, 2 or 3 moist. Texture of the fine-earth fraction is silty clay loam or clay loam with 30 to 35 percent clay. Rock fragments average from 50 to 85 percent.
COMPETING SERIES: These are the
Lacy,
Ragpie,
Reilloc,
Riggins and
Shinn soils.
Lacy soils dry for 45 to 75 cosecutive days following the summer solstice; have Oi horizons
Ragpie soils pscs with 35 to 45 percent rock fragments of welded tuff origin; soil reaction of neutral throughout
Reilloc soils dry for 75 to 90 consecutive days following the summer solstice; and are dominated by rounded quartzitic rock fragments in the particle-size control section
Shinn soils 4 to 10 inches to a lithic contact (basalt); dry for 75 to 90 consecutive days following the summer solstice
GEOGRAPHIC SETTING: Wahoo soils are on canyon breaks and dissected plateaus at an elevation of 1,100 to 3,000 feet. Slopes are 0 to 65 percent. The soils formed in colluvium and residuum derived from basalt mixed with loess. Summers are warm and dry; winters are cool and moist. The mean annual precipitation is 15 to 40 inches. The average January temperature is 27 degrees F. and the average July temperature is 65 degrees F. The mean annual temperature is 46 to 49 degrees F. The frost-free season is 110 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dalig, Gunn, Itat, Kaiders, Kiakus, Leidl, Munset, and Para soils. All of these soils are more than 20 inches to a lithic contact. In addition, Dalig and Gunn soils are on plateaus and benches. Itat soils are on foothills and plateaus. Kaiders soils are on mountains and foothills. Kiakus soils are on plateaus, benches, and canyon breaks. Leidl soils are on plateaus and canyon side slopes. Munset soils are in depressions on plateaus. Para soils are on plateaus.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately slow permeability.
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Native vegetation is bottlebrush squirreltail, lemmon needlegrass, Idaho fescue, Sandberg bluegrass, bluebunch wheatgrass, and bigheaded clover.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in Klickitat and Yakima Counties, Washington. MLRA 8, 6. The series is of small extent.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 0 to 12 inches
Argillic horizon - the zone from 5 to 12 inches
Lithic contact - the zone beginning at 12 inches
Particle-size control section - the zone from 0 to 12 inches
ADDITIONAL DATA: Partial laboratory data are available for this soil, sample number S86WA039-12.