LOCATION KREFT                   WA

Established Series
Rev. MEH/KWH/RWL
09/2019

KREFT SERIES

Landscape--valleys
Landform--flood plains, low terraces
Slope--0 to 2 percent
Parent material--alluvium derived from basalt and volcanic ash
Mean annual precipitation--about 890 mm
Mean annual air temperature--about 7 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy, amorphic, frigid Humic Vitrixerands

TYPICAL PEDON: Kreft ashy sandy loam, forested, on a 1-percent slope at an elevation of 560 m (All textures are apparent field textures.)

A1--0 to 10 cm; ashy sandy loam, brown (7.5YR 5/2) dry, dark brown (7.5YR 3/2) moist; weak fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots, common medium roots; many fine irregular pores; slightly acid (pH 6.4); clear smooth boundary

A2--10 to 30 cm; ashy sandy loam, brown (7.5YR 5/2) dry, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; soft, friable, nonsticky and nonplastic; many very fine and fine and common medium and coarse roots; many fine irregular pores; slightly acid (pH 6.3); clear wavy boundary

Bw1--30 to 91 cm; ashy sandy loam, brown (7.5YR 4/4) dry, dark brown (7.5YR 3/4) moist; weak fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine and few medium and coarse roots; common fine and medium tubular pores; moderately acid (pH 6.0); clear smooth boundary

Bw2--91 to 147 cm; ashy sandy loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; common fine prominent redoximorphic concentrations, pinkish gray (7.5YR 6/2) moist; weak fine subangular blocky structure; soft, friable, nonsticky and nonplastic; common fine and medium roots; many fine and medium tubular pores; slightly acid (pH 6.2); clear smooth boundary

C--147 to 150 cm; loamy sand, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; many medium prominent redoximorphic concentrations, pinkish gray (7.5YR 6/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; few fine roots; many fine and medium tubular pores; slightly acid (pH 6.4)

TYPE LOCATION: Klickitat County, Washington; about 300 m north and 195 m east of the southwest corner of section 5, T. 5 N., R. 12 E.; latitude 45.9451660, longitude -121.340857, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--6 to 8 degrees C
Soil moisture control section--dry in all parts 60 to 75 consecutive days following summer solstice
Thickness of umbric epipedon--25 to 36 cm
Reaction--5.6 to 6.5 throughout
Particle-size control section--moist bulk density of 0.80 to 0.90 g/cm3, volcanic glass content of 30 to 60 percent, acid oxalate aluminum plus one-half iron of 2 to 3 percent, phosphorus retention of 80 to 98 percent, and 15-bar water retention of 8 to 12 percent

A horizon
Hue--7.5YR, 10YR
Value--4 or 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Combined thickness--25 to 36 cm

Bw horizon
Hue--5YR, 7.5YR
Value--4 or 5 dry, 3 or 4 moist
Chroma--3 or 4 dry or moist
Redoximorphic concentrations--at a depth of 90 to 125 cm; few to common, prominent
Texture--ashy sandy loam, ashy loam
Combined thickness--102 to 117 cm

C horizon
Value--5 or 6 dry
Chroma--2 to 4 dry or moist
Redoximorphic concentrations--common to many, distinct
Texture--sandy loam, loamy sand, gravelly sandy loam

COMPETING SERIES:
Glen--20 to 30 percent glass; 1 to 2 percent acid oxalate aluminum plus one-half iron; 50 to 75 percent phosphorus retention; no redoximorphic concentrations
Sugarbowl, Timberhead, Troutlake, Volash--dry 45 to 60 consecutive days

GEOGRAPHIC SETTING:
Elevation--550 to 580 m
Climate--warm, dry summers; cool, wet winters; intermittent snow cover in December through March
Mean annual precipitation--840 to 940 mm
Mean January air temperature--about -3 degrees C
Mean July air temperature--about 19 degrees C
Mean annual air temperature--6 to 7 degrees C
Frost-free season--50 to 90 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Conboy--on old lake bottoms; poorly drained
Glen--on lacustrine terraces; well drained
Grayland--on low terraces; more than 35 percent clay in particle-size control section; poorly drained
Segidal--on lacustrine terraces; spodic horizon consisting of ortstein; aquic soil moisture regime

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

USE AND VEGETATION:
Use--mainly timber production, livestock grazing, crop production, building site development, and wildlife habitat
Native vegetation--mainly ponderosa pine, lodgepole pine, black cottonwood, Oregon white oak, Douglas-fir, grand fir, elk sedge, spirea, common snowberry, black hawthorn, and rose

DISTRIBUTION AND EXTENT: Klickitat County, Washington; MLRA 6; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Yakama Nation, Klickitat County, Washington; 2014

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Umbric epipedon--zone from the surface to a depth of 30 cm
*Cambic horizon--zone from 30 to 147 cm
*Particle-size control section--zone from the surface to a depth of 100 cm
*Andic soil properties--zone from the surface to a depth of 147 cm

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National Cooperative Soil Survey
U.S.A.