LOCATION PUSHTAY                 WA

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

PUSHTAY SERIES

Landscape--plateaus
Landform--ridges, structural benches
Slope--5 to 35 percent
Parent material--loess mixed with colluvium from basalt
Mean annual precipitation--380 to 460 mm
Mean annual air temperature--about 8 degrees C
Depth class--deep, very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Pachic Argixerolls

TYPICAL PEDON: Pushtay silt loam in an area of rangeland, on a 7-percent slope

A1--0 to 28 cm; silt loam, dark grayish brown (10YR 4/2) dry, very dark gray (10YR 3/1) moist; moderate fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots; common very fine tubular pores; neutral (pH 6.8); clear wavy boundary

A2--28 to 56 cm; silt loam, dark grayish brown (10YR 4/2) dry, very dark grayish brown (10YR 3/2) moist; moderate medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common very fine tubular pores; neutral (pH 7.0); abrupt smooth boundary

Bt1--56 to 71 cm; silt loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; moderate coarse subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few fine, medium, and coarse roots; common fine tubular pores; common thin clay films on faces of peds and in pores; neutral (pH 7.0); clear wavy boundary

Bt2--71 to 127 cm; silt loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; moderate coarse subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few fine, medium, and coarse roots; common fine tubular pores; common thin clay films on faces of peds and in pores; 10 percent gravel; neutral (pH 7.1); abrupt wavy boundary

2Bk--127 to 165 cm; sandy loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; few fine and medium roots; strongly effervescent, disseminated calcium carbonates; 5 percent gravel; moderately alkaline (pH 8.l)

TYPE LOCATION: Yakima County, Washington, about 3 km southeast of Toppenish Mountain; about 500 m west and 410 m north of the southeast corner of section 16, T. 9 N., R. 17 E., Willamette Meridian; latitude 46.2616820, longitude -120.6956983, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Depth to calcium carbonates--110 to 150 cm
Mean annual soil temperature at a depth of 50 cm--8 to 10 degrees C
Moisture control section--usually moist, but dry in all parts 75 to 90 consecutive days following summer solstice
Particle-size control section--averages 18 to 30 percent clay, 15 to 45 percent particles coarser than very fine sand, less than 15 percent coarse and very coarse sand, and 5 to 35 percent rock fragments
Depth to paralithic contact--100 to more than 150 cm
Thickness of mollic epipedon--50 to 81 cm

A horizon
Value--3 to 5 dry, 2 or 3 moist
Chroma--l to 3 dry or moist
Reaction--6.1 to 7.3
Combined thickness--23 to 56 cm

Bt horizon
Hue--10YR, 7.5YR
Value--4 to 6 dry or moist
Chroma--2 to 4 dry or moist
Texture of fine-earth fraction--silt loam, silty clay loam, clay loam; gravelly or cobbly in some pedons
Rock fragment content--5 to 25 percent
Reaction--6.1 to 7.3
Combined thickness--56 to 81 cm

2Bk horizon
Hue--10YR, 7.5YR
Value--5 to 7 dry, 3 or 4 moist
Chroma--3 or 4 dry or moist
Texture--dominantly sandy loam, silt loam, loam, clay, or clay loam; gravelly, cobbly, very gravelly, or very cobbly in some pedons
Rock fragment content--5 to 45 percent
Reaction--6.6 to 8.4

Some pedons have a Cr horizon (weathered basalt)

COMPETING SERIES:
Adieux--50 to 100 cm (moderately deep) to a lithic contact (basalt)
Banning--redoximorphic concentrations in argillic horizon
Blockhouse--dry 45 to 60 days; no rock fragments in particle-size control section
Coolbrith--dry from about June 15 to November 15 (about 150 days); redoximorphic concentrations within a depth of 100 cm
Dotta--more than 15 percent sand coarser than very fine sand in particle-size control section; dry more than 90 consecutive days
Drews--dry 100 to 115 consecutive days following summer solstice
Footpath--no calcium carbonates within a depth of 150 cm
Gorman--mean annual soil temperature of about 14 degrees C; 15 to 25 percent coarse and very coarse sand in particle-size control section
Harriman--no rock fragments in particle-size control section; diatomaceous material in particle-size control section
Haysum--mean annual soil temperature of 12 to 15 degrees C
Henhill--saturated at a depth of 50 to 150 cm in November through April; redoximorphic concentrations in argillic horizon
Lonkey--50 to 100 cm (moderately deep) to a paralithic contact (conglomerate tuff)
Piercepark--aridic soil moisture regime
Rankor--no calcium carbonates within a depth of 150 cm
Robinette--100 to 150 cm (deep) to a lithic contact (basalt); more than 60 percent rock fragments in lower part of argillic horizon
Starboard--50 to 100 cm (moderately deep) to a paralithic contact (dacite)
Supan--mean annual air temperature of more than 13 degrees C; more than 35 percent clay in upper part of argillic horizon
Van Dusen--more than 15 percent coarse and very coarse sand in particle-size control section
Waha--50 to 100 cm (moderately deep) to a lithic contact (basalt)
Wapinitia--argillic horizon 15 to 25 cm thick; solum 50 to 114 cm thick
Yaxon-- no calcium carbonates within a depth of 150 cm; dry 90 to 100 consecutive days following summer solstice

GEOGRAPHIC SETTING:
Elevation--520 to 950 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--380 to 460 mm
Mean annual air temperature--8 to 11 degrees C
Frost-free season--110 to 150 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Camaspatch--30 to 50 cm (shallow) to a lithic contact (basalt)
Kusipushtay, Tronsen--clayey-skeletal particle-size class
McDaniel--loamy-skeletal particle-size class
Thiessen, Van Nostern--50 to 100 cm (moderately deep) to a lithic contact (basalt)
Waxpush--15 to 25 cm (very shallow) to a lithic contact (basalt)

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

USE AND VEGETATION:
Use--livestock grazing
Vegetation--threetip sagebrush, Idaho fescue, bluebunch wheatgrass, Sandberg bluegrass, spur lupine

DISTRIBUTION AND EXTENT: Eastern slopes of Cascade Mountains, Yakama Nation, Yakima County, Washington; MLRA 6; 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
*Mollic epipedon--zone from the surface to a depth of 71 cm
*Argillic horizon--zone from 56 to 127 cm
*Particle-size control section--zone from 56 to 106 cm

P'ushtay is the Yakama word for hill or butte. The type location for this series is in the vicinity of Toppenish Mountain. The series originally was named the Pumphouse series.

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National Cooperative Soil Survey
U.S.A.