LOCATION HEHE OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Vitrandic Argixerolls
TYPICAL PEDON: Hehe very stony loam - on a 1 percent slope at an elevation of 2700 feet; woodland. (Colors are for moist soil unless otherwise noted.)
Oi-- 1 inch to 0; organic layer of needles and twigs.
A1-- 0 to 4 inches; dark brown (7.5YR 3/2) very stony loam, brown (7.5YR 5/3) dry; moderate fine and medium subangular blocky parting to weak fine granular structure; slightly hard, friable, nonsticky and nonplastic; many very fine, fine and few medium roots; many very fine, fine and few medium irregular pores; 30 percent stones and 20 percent cobbles; moderately acid (pH 6.0); clear smooth boundary. (3 to 9 inches thick)
A2-- 4 to 11 inches; dark brown (7.5YR 3/3) very stony loam, brown (7.5YR 5/3) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine and few medium roots; common very fine and fine tubular pores; common organic coatings on faces of peds; 30 percent stones, 20 percent cobbles; slightly acid (pH 6.2); clear smooth boundary. (7 to 11 inches thick)
Bt1-- 11 to 19 inches; dark brown (7.5YR 3/4) very bouldery loam, brown (7.5YR 5/4) dry; moderate medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; common distinct clay films on faces of peds; 25 percent boulders, 10 percent stones and 15 percent cobbles; slightly acid (pH 6.2); gradual irregular boundary. (7 to 15 inches thick)
Bt2-- 19 to 38 inches; dark brown (7.5YR 3/4) very bouldery clay loam, brown (7.5YR 5/4) dry, moderate fine and medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; common distinct clay films on faces of peds; 25 percent boulders, 10 percent stones and 15 percent cobbles; slightly acid (pH 6.4); abrupt wavy boundary. (3 to 8 inches thick)
Cr-- 38 inches; weathered andesite bedrock.
TYPE LOCATION: Wasco County, Oregon: 1300 feet west and 900 feet south of the NE corner of section 36, T.8 S., R.10 E. (Warm Springs Indian Reservation).
RANGE OF CHARACTERISTICS: These soils are usually moist, but are dry in all parts of the moisture control section for 60 to 90 consecutive days within the four months following the summer solstice. The mean annual soil temperature is 47 to 51 degrees F. Depth to weathered bedrock is 20 to 40 inches. The particle-size control section averages 20 to 35 percent clay, 10 to 25 percent medium, coarse, and very coarse sand, and 35 to 70 percent rock fragments. The upper 10 to 20 inches has a moist bulk density of 1.0 to 1.2 g/cc, volcanic glass content of 5 to 20 percent, acid oxalate extractable aluminum plus one-half iron of 0.4 to 1.0 percent, and 15-bar water content of 10 to 15 percent on a air-dried sample. The mollic epipedon is 10 to 20 inches thick. Base saturation (sum) is 60 to 70 percent in some part of the upper 30 inches of the solum. Hue is 7.5YR or 10YR.
The A horizon has value of 2 or 3 moist, 4 or 5 dry, chroma of 2 or 3 moist and dry. It is very stony loam or very cobbly loam and contains 5 to 35 percent stones, 10 to 30 percent cobbles, 0 to 10 percent gravel, and 0 to 5 percent boulders. It has 2 to 4 percent organic matter.
The Bt horizon has value of 3 or 4 moist, 5 or 6 dry and chroma of 3 or 4 moist and dry. It is loam or clay loam and contains 10 to 25 percent boulders, 10 to 20 percent stones, 15 to 25 percent cobbles, and 0 to 5 percent gravel.
COMPETING SERIES: These are the Bunselmeier (T), Fleener (T), Leidl (T), and Skooker (T) series. Bunselmeier soils are 40 to 60 inches deep to cinders and more than 60 percent glass. Fleener soils are dry for 110 to 125 consecutive days and are more than 60 inches to bedrock. Leidl soils have a lithic contact at 20 to 40 inches and are dry for 90 to 105 consecutive days. Skooker soils are 40 to 60 inches to highly fractured sandstone bedrock.
GEOGRAPHIC SETTING: Hehe soils are on gently sloping to strongly sloping north-facing side slopes of mountains. Elevation is 2000 to 3500 feet. Slopes are 0 to 65 percent. The soil formed in residuum and colluvium derived from andesite or basalt with an influence of volcanic ash. The climate is characterized by cool and wet winters and hot and dry summers. The mean annual precipitation is 14 to 25 inches, the mean annual temperature is 45 to 49 degrees F., and the frost-free period is 80 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bodell, Booten, Evick, Happus, Spilyay, and Teewee soils. Bodell soils are on adjacent patterned ground and shallow to bedrock. Booten soils are on north-facing side slopes, ashy, and very deep to bedrock. Evick soils are on south-facing side slopes, somewhat excessively drained, and shallow to volcanic tuff. Happus soils are on south-facing foot slopes and ashy-pumiceous. Spilyay soils are on south-facing foot slopes, fine, and very deep to bedrock. Teewee soils are fine-loamy and deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately slow.
USE AND VEGETATION: These soils are used for timber production, livestock grazing, watershed and wildlife habitat. The native vegetation is ponderosa pine and incense cedar with an understory of Idaho fescue, arrowleaf balsamroot, tailcup lupine, antelope bitterbrush, squawcarpet and greenleaf manzanita.
DISTRIBUTION AND EXTENT: North-central Oregon; MLRA B6. The soils of this series are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wasco County (Warm Springs Indian Reservation), Oregon, 1993.
REMARKS: Diagnostic horizons and features in this pedon include:
Mollic epipedon - the zone from the surface of the soil to a depth of approximately 11 inches (A1, A2 horizons)
Argillic horizon - the zone from 11 to 38 inches (Bt1, Bt2 horizons).
Particle-size control section - from 11 to 31 inches (Bt1 and upper Bt2 horizons).
loamy-skeletal family - 50 percent rock fragments (calculated) and less than 35 percent clay.
Vitrandic feature - from 0 to 11 inches and based on lab data from similar Teewee soils.