LOCATION TEEWEE OREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Vitrandic Argixerolls
TYPICAL PEDON: Teewee loam - on a 1 percent slope at an elevation of 2700 feet; woodland. (Colors are for moist soil unless otherwise noted.)
0i-- 2 inches to 0; organic layer of needles and twigs.
A1-- 0 to 4 inches; dark brown (7.5YR 3/3) loam, brown (7.5YR 5/3) dry; weak fine subangular blocky parting to weak fine granular structure; soft, friable, nonsticky and nonplastic; many very fine, fine and few medium roots; many very fine, fine and few medium irregular pores; moderately acid (pH 6.0); clear smooth boundary. (3 to 7 inches thick)
A2-- 4 to 11 inches; dark brown (7.5YR 3/3) loam, brown (7.5YR 5/3) dry; weak fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine, medium and few coarse roots; common very fine, fine, medium and few coarse tubular pores; 5 percent gravel; slightly acid (pH 6.2); clear smooth boundary. (0 to 11 inches thick)
Bt1-- 11 to 18 inches; dark brown (7.5YR 3/3) loam, brown (7.5YR 5/3) dry; moderate fine and medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common very fine, fine and few medium roots; common very fine, fine and few medium tubular pores; common distinct clay films on faces of peds; 5 percent gravel; slightly acid (pH 6.4); clear wavy boundary. (7 to 10 inches thick)
Bt2-- 18 to 27 inches; dark brown (7.5YR 3/4) clay loam; brown (7.5YR 5/4) dry, moderate medium and coarse subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common very fine, fine and medium roots; common very fine, fine and medium tubular pores; common distinct clay films on faces of peds; 10 percent gravel; slightly acid (pH 6.4); clear smooth boundary. (9 to 12 inches thick)
Bt3-- 27 to 43 inches; dark brown (7.5YR 3/4) clay loam, brown (7.5YR 5/4) dry; moderate medium and coarse subangular blocky structure; very hard, firm, sticky and plastic; few very fine and fine roots; few very fine and fine tubular pores; many distinct clay films on faces of peds; 10 percent gravel; neutral (pH 6.6); clear smooth boundary. (11 to 16 inches thick)
Bt4-- 43 to 53 inches; dark brown (7.5YR 3/4) very stony clay loam, brown (7.5YR 5/4) dry; weak medium and coarse subangular blocky structure; very hard, very firm, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; common distinct clay films on faces of peds; 20 percent stones, 20 percent cobbles and 10 percent gravel; neutral (pH 6.6); gradual wavy boundary. (10 to 12 inches thick)
2Cr-- 53 inches; weathered andesite bedrock.
TYPE LOCATION: Wasco County, Oregon: 2500 feet west and 1600 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 40 to 60 inches. The particle-size control section averages 25 to 35 percent clay, 10 to 25 percent medium, coarse, and very coarse sand, and 0 to 10 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 retention of 10 to 15 percent on a air-dried sample. Base saturation (sum) is 60 to 70 percent in some part of the upper 30 inches of the solum based on lab data from similar soils. The mollic epipedon is 10 to 20 inches thick. 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 contains 0 to 10 percent gravel and 0 to 10 percent cobbles. It has 2 to 4 percent organic matter.
The Bt1, Bt2, and Bt3 horizons have 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 0 to 10 percent gravel and 0 to 10 percent cobbles.
The Bt4 horizon has value of 3 or 4 moist, 5 or 6 dry, and chroma of 4 or 5 moist and dry. It contains 0 to 15 gravel, 10 to 20 percent cobbles and 10 to 20 percent stones.
COMPETING SERIES: These are the Georgecreek, Glenrose, Loveness (T), Morical, and Tolius series. Georgecreek soils have 25 percent medium, coarse, and very coarse sand in the particle-size control section and is 40 to 60 inches to weathered granitic bedrock. Glenrose soils are more than 60 inches to bedrock. Loveness soils are dry for more than 90 consecutive days. Morical soils are 20 to 40 inches to weathered granitic bedrock. Tolius soils are more than 60 inches to bedrock and have a mollic epipedon 20 to 30 inches thick.
GEOGRAPHIC SETTING: Teewee soils are on gently sloping to strongly sloping side slopes of mountains. Elevation is 2500 to 3500 feet. Slopes are 0 to 12 percent. The soil formed in residuum 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 Booten, Evick, Happus, Hehe, and Spilyay soils. 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. Hehe soils are loamy-skeletal and moderately deep to bedrock. Spilyay soils are on south-facing foot slopes, fine, and very 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 Douglas fir and ponderosa pine 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 OFFICE 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 18 inches ( A1, A2, Bt1 horizons).
Argillic horizon - the zone from 11 to 53 inches (Bt1, Bt2, Bt3, Bt4).
Vitrandic feature - the zone from 0 to 11 inches having 13 to 16 percent volcanic glass, 0.8 percent acid oxalate extractable aluminum plus one-half iron, and 12 to 13 percent 15-bar moisture based on air-dried sample.
Particle-size control section - the zone from 11 to 31 inches (Bt1, Bt2, and upper Bt3 horizon).
ADDITIONAL DATA: Partial laboratory data available. Pedon number 91P1151, Warm Springs, Oregon; NSSL, Lincoln, NE 5/92.