LOCATION WISALILWALA WA
Established Series
IRD PNP/KDPL/SBC
09/2019
WISALILWALA SERIES
Landscape--valleys
Landform--valley floors, stream terraces
Slope--2 to 5 percent
Parent material--alluvium
Mean annual precipitation--about 310 mm
Mean annual air temperature--about 10 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Cumulic Haploxerolls
TYPICAL PEDON: Wisalilwala silt loam in an area of rangeland, on a 2-percent, north-facing drainage bottom at an elevation of 365 m (All textures are apparent field textures.)
A1--0 to 23 cm; silt loam, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; soft, very friable, slightly sticky and nonplastic; common fine and very fine roots; common very fine irregular pores; 5 percent gravel; neutral (pH 6.6); abrupt smooth boundary
A2--23 to 61 cm; loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common fine and few medium irregular pores; 10 percent gravel; neutral (pH 6.6); abrupt smooth boundary
2C1--61 to 81 cm; very gravelly sandy loam, brown (10YR 5/3) dry, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and plastic; common fine and medium roots; common fine and medium irregular pores; 50 percent gravel and 5 percent cobbles; slightly acid (pH 6.4); clear smooth boundary
2C2--81 to 150 cm; extremely gravelly sandy loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; massive; soft, very friable, slightly sticky and slightly plastic; few fine and medium roots; common fine and medium irregular pores; 55 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); clear smooth boundary
2C3--150 to 190 cm; extremely gravelly loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; massive; soft, very friable, slightly sticky and slightly plastic; very few fine roots; common fine and medium irregular pores; 60 percent gravel and 10 percent cobbles; slightly acid (pH 6.4)
TYPE LOCATION: Yakama Nation, Yakima County, Washington, about 10.5 km west of White Swan; about 305 m east and about 155 m south of the northwest corner of section 22, T. 10 N., R. 16 E.; latitude 46.3444734, longitude -120.8130057, datum WGS 84 (coordinates estimated from section, township, and range details)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature at a depth of 50 cm--9 to 11 degrees C
Moisture control section--usually moist, but dry in all parts 90 to 105 consecutive days following summer solstice
Thickness of mollic epipedon--50 to 75 cm
Average rock fragment content in particle-size control section--35 to 60 percent; increases as depth increases
A horizon
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Texture--loam, silt loam, fine sandy loam
Clay content--8 to 15 percent
Reaction--6.1 to 7.3
Combined thickness--50 to 75 cm
2C horizon
Value--5 or 6 dry, 3 or 4 moist
Chroma--3 or 4 dry or moist
Texture--very gravelly sandy loam, extremely gravelly sandy loam, extremely gravelly loam, extremely cobbly sandy loam
Clay content--2 to 10 percent
Reaction--6.1 to 7.3
COMPETING SERIES:
Bridgewater--loamy sand or sand texture below mollic epipedon; dry 75 to 90 consecutive days following summer solstice
GEOGRAPHIC SETTING:
Elevation--300 to 640 m
Mean annual precipitation--230 to 380 mm
Mean annual air temperature--8 to 11 degrees C
Frost-free season--145 to 165 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Rock Creek--on toeslopes and valley floors; clayey-skeletal; 20 to 50 cm (very shallow, shallow) to a lithic contact (basalt)
Selah--on uplands and dissected terraces; 50 to 100 cm (moderately deep) to a duripan
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--high
USE AND VEGETATION:
Use--dominantly livestock grazing and wildlife habitat
Native vegetation--antelope bitterbrush, big sagebrush, basin wildrye, blue wildrye, wild rose, some Oregon white oak
DISTRIBUTION AND EXTENT: Yakama Nation, Yakima County, 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
*Mollic epipedon--zone from the surface to a depth of 61 cm
*Particle-size control section--zone from 25 to 100 cm
*Organic carbon content--decreases irregularly as depth increases
Wisalil is the Yakama word for hunt, and wala is the Yakama word for creek. Hunt Creek is in the vicinity of the type location for this series. The series originally was named the Cooscanyon series.
National Cooperative Soil Survey
U.S.A.