LOCATION WOLFBUTTE ORTentative Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Vitrandic Durixerolls
TYPICAL PEDON: Wolfbutte ashy loam, irrigated pasture, on a west facing slope of 2 percent at 4,305 feet elevation. When described on May 22, 2003 the soil was moist throughout. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures)
Ap--0 to 7 inches; grayish brown (10YR 5/2) ashy loam, very dark grayish brown (10YR 3/2) moist; weak thin platy structure parting to moderate fine granular; soft, friable, nonsticky, slightly plastic; low excavation difficulty; many very fine and fine roots; many very fine and fine irregular pores; 2 percent andesite gravel and 2 percent pumice paragravel; slightly acid (pH 6.5); gradual smooth boundary. (0 to 8 inches thick)
A--7 to 16 inches; dark grayish brown (10YR 4/2) ashy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; soft, friable, nonsticky, slightly plastic; low excavation difficulty; many very fine and fine roots; many very fine and fine irregular pores; 2 percent andesite gravel and 2 percent pumice paragravel; neutral (pH 6.8); gradual smooth boundary. (9 to 11 inches thick)
AB--16 to 21 inches; light brownish gray (10YR 6/2) ashy loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; low excavation difficulty; many very fine, fine, and common medium roots; many fine tubular and many very fine irregular pores; 2 percent andesite gravel and 2 percent pumice paragravel; neutral (pH 7.0); clear smooth boundary. (2 to 8 inches thick)
2Bt--21 to 28 inches; yellowish brown (10YR 5/4) sandy clay loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; moderate excavation difficulty; many very fine, fine, and common medium and coarse roots; common very fine and fine tubular pores; 10 percent distinct brown (7.5YR 4/3) moist clay films on all faces of peds; 2 percent andesite gravel and 2 percent pumice paragravel; neutral (pH 6.6); clear wavy boundary. (7 to 20 inches thick)
2Btqm--28 to 35 inches; yellowish brown (10YR 5/4) cemented gravelly sandy clay loam, 50 percent dark brown (10YR 3/3) and 50 percent dark yellowish brown (10YR 4/4) moist; weak very thick platy structure; very hard, very firm, moderately cemented by silica, slightly sticky, moderately plastic; high excavation difficulty; few very fine roots; many very fine and fine irregular pores; 5 percent distinct light olive brown (2.5Y 5/3)moist silica coatings on all faces of peds and 10 percent distinct brown (7.5YR 4/3) moist clay films on all faces of peds; 10 percent strongly cemented durinodes, 20 percent andesite gravel and 2 percent pumice paragravel; neutral ( pH 6.8); gradual wavy boundary. (4 to 12 inches thick)
2Bqm1--35 to 50 inches; yellowish brown (10YR 5/4) cemented gravelly sandy loam, 50 percent dark yellowish brown (10YR 4/4) and 50 percent dark brown (10YR 3/3) moist; massive; very firm, very hard, moderately cemented by silica, slightly sticky, moderately plastic; moderate excavation difficulty; common very fine and fine irregular pores; 10 percent distinct light olive brown (2.5Y 5/3) moist silica coatings around rock fragments; 20 percent andesite gravel and 2 percent pumice paragravel; neutral (pH 6.8); gradual wavy boundary. (5 to 30 inches thick)
2Bqm2--50 to 60 inches; pale yellow (2.5Y 8/3) cemented gravelly sandy loam, brown (10YR 4/3) moist; massive; weakly cemented by silica, hard, firm, slightly sticky, slightly plastic; moderate excavation difficulty; many very fine irregular pores; 25 percent andesite gravel and 5 percent pumice paragravel; neutral (pH 7.0).
TYPE LOCATION: Klamath County, Oregon; about 4 miles northwest of the town of Sprague River, Oregon; about 770 feet west and 1955 feet north of the southeast corner of section 31, T.35S., R.10E. (Latitude 42 degrees 29 minutes 31.89 seconds N., Longitude 121 degrees 34 minutes 5.2 seconds W.) Sprague River West, Oregon USGS quadrangle; UTM 617698 meters E, 4705449 meters N, Zone 10 NAD83
RANGE IN CHARACTERISTICS:
Average annual soil temperature- 44 to 47 degrees F.
Moisture control section - 8 and 24 inches - dry for 60 to 75 days within the four-month period following the summer solstice.
Depth duripan - 20 to 40 inches
Mollic epipedon 10 to 20 inches thick
Base saturation in the mollic epipedon 75 to 100 percent (by NH4OAc)
Estimated properties:
Volcanic glass content 5 to 20 percent
Acid oxalate Al+1/2Fe - 0.4 to 1.0 percent
Moist bulk density 1.0 to 1.2 g/cc
15 bar water retention 10 to 15 percent on air dried samples
A horizon
Value 4 or 5 dry and 2 or 3 moist
Chroma - 2 or 3 dry or moist
Texture ashy loam, ashy sandy loam, ashy coarse sandy loam
Clay content 2 to 15 percent
Gravel content 2 to 5 percent
Paragravel content 2 to 7 percent pumice
Reaction slightly acid or neutral
AB horizon
Value 5 or 6 dry, 3 or 4 moist
Chroma 2 to 4 dry or moist
Texture ashy loam, ashy sandy loam, ashy coarse sandy loam
Clay content 5 to 15 percent
Gravel content 2 to 10 percent
Paragravel content 0 to 10 percent pumice
Reaction slightly acid or neutral
2Bt horizon
Value 4 to 6 dry and 3 or 4 moist
Chroma 3 or 4 dry and moist
Texture sandy clay loam, gravelly sandy clay loam, or paragravelly sandy clay loam
Clay content 20 to 30 percent
Gravel content 2 to 30 percent
Paragravel content 0 to 10 percent pumice
Reaction slightly acid or neutral
2Btqm horizon:
Value 5 to 7 dry, and 3 to 5 moist
Chroma 3 or 4 dry or moist
Texture cemented gravelly sandy loam, cemented sandy clay loam, or cemented gravelly sandy clay loam
Clay content 20 to 30 percent
Gravel content 5 to 32 percent
Cementation moderately cemented
2Bqm horizon:
Hue - 10YR or 2.5Y dry or moist
Value 5 to 8 dry, and 3 to 5 moist
Texture cemented gravelly sandy loam, or cemented very gravelly sandy loam
Clay content 5 to 20 percent
Gravel content 20 to 35 percent
Cementation weakly to moderately cemented
COMPETING SERIES: There are no competing series in this family.
GEOGRAPHIC SETTING: Wolfbutte soils are on alluvial fans and stream terraces in valleys. Elevations range from 4,200 to 4,400 feet. The soils formed in alluvium derived from volcanic rock and tephra. Slopes range from 0 to 8 percent. The climate is characterized by cold wet winters and hot dry summers. The average annual precipitation ranges from 15 to 18 inches. The average annual temperature ranges from 43 to 45 degrees F. The frost-free period is 50 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Choptie, Crume, and Lobert soils. Choptie soils are on adjacent plateaus. They are 12 to 20 inches deep to a lithic contact. Crume soils are on stream terraces. They are 40 to 60 inches deep to a paralithic contact. Lobert soils are on adjacent stream terraces. They have less than 18 percent clay in the particle-size control section and are more than 60 inches deep.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability above the duripan.
USE AND VEGETATION: These soils are used for rangeland, irrigated and non-irrigated pastureland and hayland. The soils commonly support mountain big sagebrush, antelope bitterbrush, Idaho fescue, squirreltail, and scattered ponderosa pine.
DISTRIBUTION AND EXTENT: Basins in south-central Oregon, MLRA 21. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Klamath County, Oregon, 2003.
REMARKS: Diagnostic horizons and features in this pedon include:
Mollic epipedon The zone from the surface to 16 inches (Ap and A horizons).
Vitrandic subgroup criteria The zone from the surface to 21 inches (Ap, A, and AB horizons)
Argillic horizon The zone from 21 to 28 inches (2Bt horizon).
Duripan The zone from 28 to 60 inches (2Btqm, 2Bqm1 and 2Bqm2 horizons).
Duripan cementation is moderately cemented and/or weaker (Haplic subgroup).
Particle-size control section the zone from 21 to 28 inches (2Bt horizon)
ADDITIONAL DATA:
NASIS Site ID: 03-SMM-14
NASIS Pedon ID: 03OR681014
Ecological Site: Deep Loamy 16 - 20 PZ (R021XY410OR)