LOCATION NANKWALA                WA

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

NANKWALA SERIES

Landscape--mountains, canyonlands
Landform--mountain slopes, ridges, canyon slopes
Slope--0 to 90 percent
Parent material--volcanic ash and basalt colluvium
Mean annual precipitation--about 1000 mm
Mean annual air temperature--about 6 degrees C
Depth class--moderately deep
Drainage class--somewhat excessively drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy-skeletal, mixed, frigid Humic Vitrixerands

TYPICAL PEDON: Nankwala ashy sandy loam, very stony, in an area of forestland, on a 3-percent, south-facing ridge at an elevation of 1225 m (All textures are apparent field textures.)

Oi--0 to 3 cm; partially decomposed needles, cones, and twigs; abrupt smooth boundary

A--3 to 15 cm; ashy sandy loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; weakly smeary; common very fine, fine, and medium roots; few very fine and fine irregular pores; 10 percent gravel; slightly acid (pH 6.5), NaF pH 12.0; clear smooth boundary

Bw1--15 to 41 cm; very cobbly ashy sandy loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; weakly smeary; common very fine and fine and few medium and coarse roots; common very fine and few fine tubular pores; 15 percent gravel, 25 percent cobbles, and 10 percent stones; neutral (pH 7.0), NaF pH 11.5; clear smooth boundary

Bw2--41 to 79 cm; very cobbly ashy sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; common fine and few medium and coarse roots; common very fine and few fine tubular pores; 15 percent gravel, 30 percent cobbles, and 10 percent stones; neutral (pH 7.0), NaF pH 11.5; abrupt smooth boundary

R--79 cm; fractured basalt

TYPE LOCATION: Yakama Nation, Yakima County, Washington, about 4 km northwest of Signal Peak; about 720 m north and 560 m west of the southeast corner of section 28, T. 9 N., R. 13 E., Willamette Meridian; latitude 46.235919, longitude -121.195167, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature at a depth of 50 cm--7 to 8 degrees C
Moisture control section--usually moist, but dry in all parts 60 to 75 consecutive days following summer solstice
Thickness of umbric epipedon--30 to 75 cm
Rock fragment content in particle-size control section--35 to 70 percent
Percentage of surface covered with stones--0 to 3 percent

Andic soil properties
*Volcanic glass content--5 to 30 percent
*Ammonium oxalate aluminum plus one-half iron--2 to 3 percent
*Bulk density--0.65 to 0.9 g/cm3
*15-bar water retention (air-dried samples)--10 to 12 percent

Oi horizon
Thickness--0 to 5 cm

A horizon
Hue--7.5YR, 10YR
Value--3 to 5 dry, 2 or 3 moist
Chroma--3 or 4 dry, 2 or 3 moist
Rock fragment content--5 to 15 percent
Thickness--10 to 25 cm

Bw horizon
Hue--7.5YR, 10YR
Value--4 to 6 dry, 3 or 4 moist
Chroma--2 to 4 dry or moist
Texture of fine-earth fraction--ashy sandy loam, ashy fine sandy loam
Rock fragment content--35 to 70 percent
Combined thickness--36 to 71 cm

COMPETING SERIES:
Badgerwash--50 to 100 cm (moderately deep) to a duripan
Kaat, Tumac--no lithic contact within a depth of more than 150 cm
Slicklog--no lithic contact within a depth of more than 150 cm; mollic epipedon

GEOGRAPHIC SETTING:
Elevation--760 to 1525 m
Mean annual precipitation--890 to 1150 mm
Mean annual air temperature--5 to 7 degrees C
Frost-free season--70 to 110 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Lamay--on ridges and side slopes of mountains; 25 to 50 cm (shallow) to a lithic contact (basalt)
Nank--on benches, plateaus, and side slopes; no lithic contact within a depth of more than 150 cm; volcanic ash mantle 36 to 64 cm thick; argillic horizon
Patu--on benches, plateaus, and side slopes; volcanic ash mantle 36 to 64 cm thick; argillic horizon
Singh--on benches, plateaus, and side slopes; no lithic contact within a depth of more than 150 cm; volcanic ash mantle 36 to 64 cm thick; skeletal argillic horizon
Yatama--on benches and side slopes; no lithic contact within a depth of more than 150 cm; ashy throughout

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

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Vegetation--scattered ponderosa pine, Douglas-fir, grand fir, Oregon white oak, bitterbrush, balsamroot, bluebunch wheatgrass, white spirea, California hazel, pinegrass, elk sedge, 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; 2005

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Umbric epipedon--zone from 3 to 41 cm
*Cambic horizon--zone from 41 to 79 cm
*Andic soil properties--zone from 3 to 79 cm
*Depth to lithic contact--79 cm
*Particle-size control section--zone from 3 to 79 cm

Nank wala translates to cedar creek in Yakama. The type location for this series is near Cedar Creek, on the Yakama Nation Reservation. This series originally was named the Nicabeth series.

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National Cooperative Soil Survey
U.S.A.