LOCATION KREFT WATentative Series
TAXONOMIC CLASS: Ashy, amorphic, frigid Humic Vitrixerands
TYPICAL PEDON: Kreft ashy sandy loam- forested, on a 1 percent slope at an elevation of 1,840 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures.)
A1--0 to 4 inches; brown (7.5YR 5/2) ashy sandy loam, 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--4 to 12 inches; brown (7.5YR 5/2) ashy sandy loam, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; soft, friable, nonsticky and nonplastic; many very fine and fine roots, common medium and coarse roots; many fine irregular pores; slightly acid (pH 6.3); clear wavy boundary. (Combined thickness of the A horizon is 10 to 14 inches thick)
Bwl--12 to 36 inches; brown (7.5YR 4/4) ashy sandy loam, 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 roots, few medium and coarse roots; common fine and medium tubular pores; moderately acid (pH 6.0); clear smooth boundary.
Bw2--36 to 58 inches; brown (7.5YR 5/4) ashy sandy loam, dark brown (7.5YR 3/4) moist; common fine prominent redox concentrations of 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. (Combined thickness of the Bw horizon is 40 to 46 inches thick)
C--58 to 60 inches; brown (7.5YR 5/4) loamy sand, dark brown (7.5YR 3/4) moist; many medium prominent redox concentrations of 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 1,000 feet north and 640 feet east of the southwest corner of section 5, T.5N., R.12E. (Latitude 45 degrees, 56 minutes, 44 seconds N. and Longitude 121 degrees, 20 minutes, 21 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 43 to 46 degrees F. The soil moisture control section is dry in all parts for 60 to 75 consecutive days following the summer solstice. The umbric epipedon is 10 to 14 inches thick. Reaction is moderately acid or slightly acid throughout. The 0 to 40 inch particle-size control section has an estimated moist bulk density of 0.80 to 0.90 g/cc, volcanic glass content of 30 to 60 percent, acid oxalate extractable aluminum plus one-half iron of 2.0 to 3.0 percent, phosphate retention of 80 to 98 percent, and 15 bar water retention of 8 to 12 percent.
The A horizon has hue of 7.5YR or 10YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3 dry and moist.
The Bw horizon has hue of 5YR or 7.5YR, value of 4 or 5 dry, 3 or 4 moist and chroma of 3 or 4 dry and moist. Few to common prominent redox concentrations occur from 36 to 50 inches. Texture is ashy sandy loam or ashy loam.
The C horizon has value of 5 or 6 dry and chroma of 2 to 4 dry and moist. Redox concentrations are common to many distinct. Texture is sandy loam, loamy sand or gravelly sandy loam.
COMPETING SERIES: These are the Glen, Lundgren, Mountadams (T), Mullig (T), Pinbit, Sugarbowl, Timberhead, Troutlake, Volash, and Wanoga series. Lundgren and Wanoga soils are dry for 90 to 110 consecutive days. Sugarbowl, Timberhead, Troutlake and Volash soils are dry for 45 to 60 consecutive days. Glen soils have 20 to 30 percent glass, 1.0 to 2.0 percent acid oxalate extractable aluminum plus one-half iron and 50 to 75 percent phosphate retention and do not have redox concentrations. Lundgren and Wanoga soils are dry for 90 to 110 consecutive days. Mountadams and Mullig soils are series currently not recognized in any progressive survey and, in addition, do not have redox concentrations. Pinbit soils are dry for 75 to 90 consecutive days.
GEOGRAPHIC SETTING: Kreft soils are on low terraces at elevations of 1,800 to 1,900 feet. These soils formed in alluvium from basalt and volcanic ash. Summers are warm and dry and winters are cool and wet with an intermittent snow cover from December to March. The mean annual precipitation is 33 to 37 inches. The average January temperature is 27 degrees F. and the average July temperature is 66 degrees F. The mean annual temperature is 43 to 45 degrees F. The frost-free season is 50 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Conboy, Glen, Grayland, Segidal soils. Conboy soils are on old lake bottoms and are poorly drained. Glen soils are on lacustrine terraces and are well drained. Grayland soils are on low terraces, have more than 35 percent clay in the control section and are poorly drained. Segidal soils are on lacustrine terraces, have a spodic horizon, consisting of ortstein and an aquic moisture regime.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow runoff; moderate permeability.
USE AND VEGETATION: These soils are used mainly for timber production, livestock grazing, crop production, building sites, and wildlife habitat. Native vegetation is mainly ponderosa pine, lodgepole pine, black cottonwood, Oregon white oak, Douglas-fir, and grand fir, with and understory of elk sedge, spirea, common snowberry, black hawthorn, and rose.
DISTRIBUTION AND EXTENT: Klickitat County, Washington; MLRA 6. The series is of small extent.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Klickitat County, Washington, 1990. Yakima Indian Reservation.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon - the zone from 0 to 12 inches
Cambic horizon - the zone from 12 to 58 inches
Particle-size control section - the zone from 0 to 40 inches (The A1, A2, Bw1 and part of the Bw2 horizons)
Andic soil properties - the zone from 0 to 58 inches (assumed)
Mineralogy based on associated Glen and Guler soils.
12/2005 This series originally set up within the Klickitat County soil survey until boundary change with Yakima Indian Reservation soil survey in 2003.
ADDITIONAL DATA: This soil was previously named Glen Variant.