LOCATION SOHAPPY WA
Established Series
Rev. EER/KWH/KDPL/KH
09/2019
SOHAPPY SERIES
Landscape--plateaus
Landform--structural benches
Slope--2 to 60 percent
Parent material--loess over colluvium derived from basalt and interbedded sedimentary material
Mean annual precipitation--about 200 mm
Mean annual air temperature--about 10 degrees C
Depth class--deep
Drainage class--well drained
Soil moisture regime--aridic
Soil temperature regime--mesic
Soil moisture subclass--xeric
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Duric Xeric Haplocalcids
TYPICAL PEDON: Sohappy silt loam in an area of rangeland, on a 3-percent slope at an elevation of 550 m
A--0 to 15 cm; silt loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; moderate thin and medium platy structure parting to weak fine subangular blocky; soft, very friable, nonsticky and nonplastic; common fine and medium and few coarse roots; many very fine and fine irregular pores; neutral (pH 7.0); clear smooth boundary
Bw1--15 to 46 cm; silt loam, pale brown (10YR 6/3) dry, dark brown (10YR 3/3) moist; weak medium prismatic structure parting to weak medium subangular blocky; soft, very friable, nonsticky and nonplastic; common fine and medium and few coarse roots; many very fine and fine irregular pores; moderately alkaline (pH 8.0); clear smooth boundary
Bw2--46 to 86 cm; silt loam, light yellowish brown (10YR 6/4) dry, brown (10YR 4/3) moist; weak medium prismatic structure parting to weak medium subangular blocky; slightly hard, firm, nonsticky and nonplastic; few fine, medium, and coarse roots; many very fine and fine irregular pores; 5 percent basalt gravel; moderately alkaline (pH 8.0); abrupt wavy boundary
2Bk--86 to 114 cm; gravelly fine sandy loam, light brownish gray (10YR 6/2) dry, brown (10YR 4/3) moist; massive; slightly hard, friable, nonsticky and nonplastic; common fine roots, matted on pan fragments at a depth of 114 cm; common fine irregular pores; 10 percent basalt gravel and 5 percent basalt cobbles; strongly effervescent; abrupt smooth boundary
2Bkqm1--114 to 132 cm; fractured lime-silica pan; 20 percent gravel and 5 percent cobbles; clear smooth boundary
2Bkqm2--132 cm; indurated lime-silica duripan
TYPE LOCATION: Yakima County, Washington, about 19 km south of Toppenish, off Sohappy Road; about 30 m north and 90 m west of the southeast corner of section 7, T. 8 N., R. 20 E.; latitude 46.1859360, longitude -120.3467636, datum WGS 84 (coordinates estimated from section, township, and range)
RANGE IN CHARACTERISTICS:
Mean annual air temperature at a depth of 50 cm--10 to 13 degrees C
Soil moisture control section--dry more than one-half the time the soil temperature at a depth of 50 cm is higher than 5 degrees C
Sand content in particle-size control section--more than 15 percent particles larger than very fine sand
Depth to secondary carbonates--60 to 110 cm
Depth to discontinuity (2Bk horizon)--65 to 95 cm
Depth to indurated duripan (where present)--more than 110 cm
A horizon
Value--5 or 6 dry, 3 or 4 moist
Chroma--3 or 4 dry or moist
Thickness--8 to 15 cm
Bw horizon
Value--6 or 7 dry
Chroma--3 or 4 dry or moist
Texture--silt loam, loam
Clay content--10 to 18 percent
Combined thickness--51 to 112 cm
2Bk horizon
Hue--7.5YR, 10YR
Value--6 or 7 dry, 3 or 4 moist
Texture of fine-earth fraction--fine sandy loam, silt loam, loam, clay loam
Rock fragment content--10 to 30 percent
Structure--massive, subangular blocky
Calcium carbonate content (where structured)--surfaces of peds coated with lime; interior of peds in some pedons does not effervesce with 10 percent HCl
Thickness--23 to 51 cm
2Bkqm1 horizon
Thickness--13 to 25 cm
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--150 to 670 m
Climate--semiarid; warm, dry summers; cool, moist winters
Mean annual precipitation--150 to 230 mm
Mean January air temperature--about -1 degrees C
Mean July air temperature--about 22 degrees C
Mean annual air temperature--about 9 to 11 degrees C
Frost-free season--135 to 170 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bakeoven--on uplands; loamy-skeletal particle-size class; 10 to 25 cm (very shallow) to a lithic contact (basalt)
Kiona--on hillsides; loamy-skeletal particle-size class
Prosser--on hillslopes; 50 to 100 cm (moderately deep) to a lithic contact (basalt)
Shano--coarse-silty particle-size class
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--domestic livestock grazing
Native vegetation--Wyoming big sagebrush, Sandberg bluegrass, bluebunch wheatgrass
DISTRIBUTION AND EXTENT: Klickitat and Yakima Counties, Washington; MLRA 8; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Yakima Training Center, Yakima County, Washington; 1994
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zone from 15 to 61 cm
*Calcic horizon--zone from 86 to 114 cm
*Petrocalcic horizon--zone from 114 to 132 cm
*Duripan--zone from 114 to 132 cm
*Depth to lithologic discontinuity--86 cm; secondary lime in horizon below discontinuity
*Particle-size control section--zone from 25 to 100 cm
National Cooperative Soil Survey
U.S.A.