LOCATION TANNAWASHA WA

Established Series
Rev. PNP/KDPL/SBC
09/2019

TANNAWASHA SERIES

Landscape--plateaus
Landform--structural benches
Slope--2 to 5 percent
Parent material--loess over residuum derived from basalt
Mean annual precipitation--about 280 mm
Mean annual air temperature--about 9 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--aridic (bordering on xeric)
Soil temperature regime--mesic
Soil moisture subclass--xeric

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Xeric Natrargids

TYPICAL PEDON: Tannawasha silt loam in an area of rangeland, on a 2-percent, east-facing slope on top of a plateau (All textures are apparent field textures.)

A1--0 to 8 cm; silt loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; moderate medium platy structure; hard, very friable, nonsticky and slightly plastic; common fine roots; common very fine and fine irregular pores, slightly acid (pH 6.5); abrupt smooth boundary

A2--8 to 15 cm; silt loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common fine roots; common very fine and fine irregular pores; neutral (pH 7.1); abrupt smooth boundary

Bt1--15 to 28 cm; loam, light yellowish brown (10YR 6/4) dry, brown (10YR 4/3) moist; moderate medium columnar structure parting to strong medium subangular blocky; slightly hard, friable, moderately sticky and moderately plastic; common fine roots; common fine irregular pores; few faint clay films on faces of peds; neutral (pH 7.1); clear wavy boundary

Bt2--28 to 51 cm; silt loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 3/4) moist; weak coarse columnar structure parting to strong fine and medium angular blocky; hard, firm, moderately sticky and moderately plastic; common fine roots; common medium irregular pores; 10 percent gravel; common distinct clay films on faces of peds; slightly alkaline (pH 7.6); clear wavy boundary

2Bt3--51 to 66 cm; very cobbly silt loam, very pale brown (10YR 7/3) dry, brown (10YR 5/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; hard, friable, moderately sticky and moderately plastic; few very fine roots; common medium irregular pores; 10 percent gravel and 25 percent cobbles; few distinct clay bridges and films on faces of peds and in pores; moderately alkaline (pH 8.2); sodium adsorption ratio of 9.6; abrupt wavy boundary

2Btn--66 to 84 cm; very cobbly loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; moderate medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine roots; common very fine and fine irregular pores; 10 percent gravel and 25 percent cobbles; few distinct clay bridges and films on faces of peds and in pores; moderately alkaline (pH 8.3); sodium adsorption ratio of 14.2; abrupt wavy boundary

2Btkn--84 to 99 cm; cobbly clay loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few very fine roots; few fine irregular pores; 10 percent gravel and 20 percent cobbles; violently effervescent, disseminated carbonates and carbonates on faces of peds and in seams; moderately alkaline (pH 8.3); sodium adsorption ratio of 17.6; abrupt smooth boundary

3R--99 cm; basalt

TYPE LOCATION: Yakama Nation, Yakima County, Washington, about 1.5 km southeast of Dry Creek; about 520 m west and 60 m north of the southeast corner of section 32, T. 9 N., R. 18 E.; latitude 46.2152841, longitude -120.5894589, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--9 to 11 degrees C
Moisture control section--dry 105 to 120 days in most years
Particle-size control section--averages 20 to 35 percent clay; 0 to 10 percent gravel in upper part; 5 to 10 percent gravel and 15 to 30 percent cobbles in lower part
Sodium adsorption ratio--13 to 25 in some subhorizons within 40 cm of the upper boundary of the natric horizon
Depth to bedrock--74 to 100 cm

A horizon
Value--5 or 6 dry, 3 or 4 moist
Chroma--3 to 5 dry, 3 or 4 moist
Gravel content--0 to 5 percent
Reaction--6.1 to 7.8
Sodium adsorption ratio--2 to 7 in upper part, 3 to 12 in lower part
Electrical conductivity--0.5 to 2.5 dS/m
Combined thickness--10 to 23 cm

Bt horizon
Value--5 or 6 dry, 3 to 5 moist
Chroma--3 or 4 dry or moist
Texture--loam, silt loam, silty clay loam, clay loam
Gravel content--0 to 10 percent
Reaction--6.6 to 8.4
Sodium adsorption ratio--4 to 10
Electrical conductivity--0.5 to 2.5 dS/m
Combined thickness--25 to 50 cm

2Bt horizon
Value--5 to 7 dry, 3 to 5 moist
Chroma--3 or 4 dry or moist
Texture--very cobbly loam, very cobbly silt loam, cobbly loam, cobbly silt loam
Total rock fragment content--20 to 40 percent
Gravel content--5 to 10 percent
Cobble content--15 to 30 percent
Reaction--6.6 to 8.4
Sodium adsorption ratio--7 to 10
Electrical conductivity--0.5 to 2.5 dS/m
Thickness--0 to 15 cm

2Btn horizon
Value--5 to 7 dry, 3 to 5 moist
Chroma--3 or 4 dry or moist
Texture--very cobbly loam, very cobbly silt loam, cobbly loam, cobbly silt loam
Total rock fragment content--20 to 40 percent
Gravel content--5 to 10 percent
Cobble content--15 to 30 percent
Reaction--7.9 to 9.0
Sodium adsorption ratio--14 to 23
Electrical conductivity--0.5 to 2.5 dS/m
Thickness--8 to 18 cm

2Btkn horizon
Hue--7.5YR, 10YR
Value--4 to 7 dry, 3 to 5 moist
Chroma--3 or 4 dry or moist
Texture--cobbly clay loam, cobbly loam, cobbly silt loam, loam, silt loam, clay loam
Clay content--20 to 40 percent
Gravel content--0 to 10 percent
Cobble content--10 to 25 percent
Reaction--7.9 to 9.0
Sodium adsorption ratio--16 to 23
Electrical conductivity--0.5 to 2.5 dS/m
Thickness--0 to 23 cm

COMPETING SERIES:
Antelope Springs, Mesman, Slipback, Wespac--no lithic contact within a depth of more than 150 cm
Calnat--50 to 100 cm (moderately deep) to a paralithic contact (tuffaceous siltstone, fine-grained sandstone)

GEOGRAPHIC SETTING:
Elevation--460 to 700 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--200 to 310 mm
Mean annual air temperature--8 to 11 degrees C
Frost-free season--115 to 160 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Piniiptit--on structural benches, plateaus, and mesas; mollic epipedon; no natric horizon
Meninick--on plateaus and mesas; 25 to 50 cm (shallow) to a lithic contact (basalt); no natric horizon
Onepennee--on structural benches and foothills; 13 to 25 cm (very shallow) to a lithic contact (basalt)
Prosser--on plateaus, mesas, buttes, and structural benches; no natric horizon
Zen--on side slopes and ridgetops; mollic epipedon; no natric horizon

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately low, low

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Vegetation--Sandberg bluegrass, narrowleaf goldenweed, big sagebrush

DISTRIBUTION AND EXTENT: Yakama Nation, Yakima County, south-central Washington; MLRA 8; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Yakama Nation, Yakima County, Washington; 2014

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Argillic horizon--zone from 15 to 99 cm
*Natric horizon--zone from 66 to 99 cm
*Particle-size control section--zone from 15 to 65 cm

Tannawasha is the name of a pasture between Dry Creek and Logy Creek. It is also a surname used by the Yakama Nation.

National Cooperative Soil Survey
U.S.A.