LOCATION PUUYWALA WA
Established Series
Rev. AVK/RJE/KDPL/SBC
09/2019
PUUYWALA SERIES
Landscape--mountains
Landform--structural benches, mountain slopes
Slope--0 to 60 percent
Parent material--mixed volcanic ash and loess over colluvium derived from basalt
Mean annual precipitation--640 to 890 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Coarse-loamy, isotic, frigid Andic Humixerepts
TYPICAL PEDON: Puuywala ashy sandy loam
Oi--0 to 3 cm; slightly decomposed conifer needles and twigs
A1--3 to 13 cm; ashy sandy loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; many fine and common medium and coarse roots; moderately acid (pH 5.6); NaF pH 10.1; abrupt smooth boundary
A2--13 to 35 cm; ashy sandy loam, brown (10YR 5/3) dry, dark brown (7.5YR 3/2) moist; weak medium subangular blocky structure parting to moderate medium granular; soft, very friable, nonsticky and nonplastic; common fine, medium, and coarse roots; few very fine tubular pores; moderately acid (pH 5.8); NaF pH 10.1; gradual wavy boundary
2BA--35 to 79 cm; loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/2) moist; weak medium granular structure; slightly hard, friable, nonsticky and nonplastic; few fine, medium, and coarse roots; few very fine tubular roots; 10 percent gravel; moderately acid (pH 6.0); NaF pH 10.0; gradual wavy boundary
2Bw1--79 to 122 cm; loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; hard, firm, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; 10 percent gravel; moderately acid (pH 6.0); NaF pH 10.0; gradual wavy boundary
2Bw2--122 to 155 cm; gravelly loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; 20 percent gravel; moderately acid (pH 6.0); NaF pH 10.0
TYPE LOCATION: Yakama Nation, Yakima County, Washington, about 9.5 km west of the Mill Creek guard station, on Signal Peak Road; about 400 m east and 300 m north of the southwest corner of section 31, T. 9 N., R. 15 E. W.; latitude 46.2176679, longitude 120.9954766, datum WGS 84 (coordinates estimated from section, township, and range)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--7 to 8 degrees C
Soil moisture control section--dry in all parts 60 to 75 consecutive days during the 4 months following summer solstice in 6 years or more out of 10 years
Thickness of umbric epipedon--more than 50 cm
Base saturation (by sum of bases)--10 to 30 percent in upper 35 cm, 30 to 40 percent below that depth
Average rock fragment content--5 to 15 percent in particle-size control section, 10 to 35 percent below a depth of 100 cm
Reaction--pH of 5.6 to 6.5; sodium fluoride pH of more than 9.4 throughout
A horizon
Hue--10YR, 7.5YR
Value--5 dry, 3 moist
Chroma--4 dry, 2 moist
Texture of fine-earth fraction--sandy loam
Rock fragment content--0 to 15 percent
Moist bulk density--0.85 to 0.95 g/cm3
Volcanic glass content--5 to 30 percent
Ammonium acetate aluminum plus 1/2 iron--1 to 2 percent
15-bar moisture retention--8 to 12 percent
Combined thickness--18 to 35 cm
2BA horizon
Thickness--30 to 46 cm
2Bw horizon
Hue--7.5YR, 10YR
Chroma--2 to 4 moist
Texture of fine-earth fraction--loam
Gravel content--5 to 15 percent in particle-size control section, 5 to 35 percent below a depth of 100 cm
Clay content--10 to 20 percent throughout
Combined thickness--56 to 100 cm
COMPETING SERIES:
Bercumb--15 to 35 percent rock fragments in particle-size control section; umbric epipedon 25 to 30 cm thick
GEOGRAPHIC SETTING:
Elevation--760 to 1525 m
Climate--cool, dry summers; cold, moist winters; snow cover in December through April
Mean annual precipitation--640 to 890 mm
Mean January air temperature--about -6 degrees C
Mean July air temperature--about 15 degrees C
Mean annual air temperature--about 4 to 8 degrees C
Frost-free season--80 to 110 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Adamslake--argillic horizon
Berson--mollic epipedon
Sapkin--50 to 100 cm (moderately deep) to a lithic contact (basalt)
Satus--loamy-skeletal particle-size class
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--mainly timber production, livestock grazing, wildlife habitat, and recreation
Vegetation--mainly Douglas-fir, grand fir, ponderosa pine, California hazel, pinegrass, prince's pine, common snowberry, elk sedge, ceanothus, white spirea, and creambush oceanspray
DISTRIBUTION AND EXTENT: East slopes of Cascade Mountains, in south-central Washington; MLRA 6; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakama Nation, Yakima County, Washington; 1987
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Umbric epipedon--zone from 3 to 79 cm
*Cambic horizon--zone from 79 to 155 cm
*Coarse-loamy particle-size control section--zone from 28 to 103 cm
*Andic soil properties--zone from 3 to 35 cm
Puuy wala translates to snow creek in Yakama. The type location of this series is in the vicinity of Snow Creek. The series originally was named the Smith series.
National Cooperative Soil Survey
U.S.A.