LOCATION CABELL OR
Established Series
Rev. JLW/RJO/DAL
10/2012
CABELL SERIES
The Cabell series consists of very deep, well-drained soils on sideslopes of moraines. Cabell soils formed in volcanic ash overlying till from mixed rocks, dominantly of soft tuffs. Slopes are 0 to 50 percent. Mean annual precipitation is about 30 inches and mean annual temperature about 38 degrees F.
TAXONOMIC CLASS: Fine-loamy, isotic Andic Haplocryalfs
TYPICAL PEDON: Cabell ashy silt loam - forested, on a 20 percent east-facing slope at an elevation of 5,320 feet. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 1 inch; slightly decomposed needles.
Bw--1 to 14 inches; dark brown (10YR 3/3) ashy silt loam, pale brown (10YR 6/3) dry; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many fine, common medium, and few coarse roots; common fine irregular and few fine tubular pores; moderately acid (pH 6.0); clear wavy boundary. (7 to 13 inches thick)
2Eb--14 to 22 inches; brown (10YR 5/3) gravelly sandy loam, light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium, and few coarse roots; few fine irregular, and common fine and medium tubular pores; 15 percent gravel, 5 percent cobbles, and 3 percent stones; moderately acid (pH 6.0); clear wavy boundary. (4 to 13 inches thick)
2EBtb--22 to 29 inches; yellowish brown (10YR 5/4) gravelly sandy loam, pale brown (10YR 6/3) dry; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common moderately thick clay films on ped faces; few fine and medium roots; common fine and few medium tubular pores; 20 percent gravel, 5 percent cobbles, and 5 percent stones; moderately acid (pH 6.0); gradual smooth boundary. (0 to 15 inches thick)
2Btb--29 to 49 inches; yellowish brown (10YR 5/4) gravelly sandy clay loam, pale brown (10YR 6/3) dry; weak coarse subangular blocky structure parting to moderate fine and medium angular blocky; hard, firm, very sticky and moderately plastic; continuous thin clay films on ped faces and common moderately thick clay films on ped faces; few fine roots; few fine vesicular pores; 20 percent gravel, 5 percent cobbles, and 5 percent stones; moderately acid (pH 6.0); gradual smooth boundary. (15 to 20 inches thick)
2BCb--49 to 61 inches; yellowish brown (10YR 5/4) gravelly clay loam, pale brown (10YR 6/3) dry; massive; hard, firm, very sticky and moderately plastic; few fine vesicular pores; 20 percent gravel, 5 percent cobbles, and 5 percent stones; slightly acid (pH 6.3).
TYPE LOCATION: Grant County, Oregon
Section 35 (SW 1/4, SW 1/4, SW 1/4), T. 7 S., R. 35 1/2 E.
Latitude: 44 degrees, 54 minutes, 21 seconds, north
Longitude: 118 degrees, 23 minutes, 12 seconds, west
UTM coordinates: zone 11; north 4973207.9 meters, east 390527.3 meters; NAD27
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean Annual Soil Temperature: 38 to 41 degrees F
Mean Summer Soil Temperature: 43 to 46 degrees F
Mean Winter Soil Temperature: 32 to 35 degrees F
Soil Moisture: udic regime; dry 30 to 45 days in summer
Particle-size Control Section: upper 20 inches of argillic horizon
clay content, average: 28 to 33 percent
rock fragment content, average: 10 to 33 percent
Diagnostic Horizons and Features:
andic soil properties: upper boundary at the mineral soil surface; 7 to 13 inches thick
Al+1/2Fe (ammonium oxalate): 1.6 to 3.0 percent
bulk density: 0.65 to 0.9 g/cc
P retention: 60 to 90 percent
0.02-2.0 mm fraction: 40 to 60 percent of fine earth
glass content in the 0.02 to 2.0 mm fraction: 60 to 90 percent
water content at 1500 kPa (air dry): 5 to 12 percent
8Si + 2Fe (ammonium oxalate): 5 to 12 percent
8Si - 2Fe (ammonium oxalate): 4 to 8 percent
eluvial horizon, buried: 4 to 13 inches thick
argillic horizon, buried: 15 to 20 inches thick
Bw horizon:
color, moist: 10YR 3/3, 4/3
color, dry: 10YR 5/3, 6/2, 6/3
texture: ASHY-SIL
clay content: 4 to 7 percent
rock fragment content: 0 to 14 percent
gravel: 0 to 10 percent
cobbles: 0 to 5 percent
reaction: strongly acid to slightly acid; pH: 5.1 to 6.5
2Eb and 2EBb horizons:
color, moist: 10YR 5/3, 5/4
color, dry: 10YR 5/3, 6/2, 6/3, 6/4
texture: GR-SL, L, SIL
clay content: 7 to 18 percent
rock fragment content: 5 to 30 percent
gravel: 5 to 25 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
reaction: moderately acid to slightly acid; pH: 5.6 to 6.5
2Btb horizon:
color, moist: 10YR 5/3, 5/4
color, dry: 10YR 6/3, 6/4
texture: SICL, GR-CL, GR-SCL
clay content: 25 to 35 percent
rock fragment content: 10 to 33 percent
gravel: 10 to 25 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
reaction: moderately acid to slightly acid; pH: 5.6 to 6.5
2BCb horizon:
color, moist: 10YR 5/4, 6/4
color, dry: 10YR 6/3, 6/4
texture: GR-CL, SICL
clay content: 28 to 38 percent
rock fragment content: 0 to 35 percent
gravel: 0 to 30 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
reaction: moderately acid to slightly acid; pH: 5.6 to 6.5
COMPETING SERIES:
Fifesridge: very deep in colluvium from basalt or andesite; andic soil properties in thin ash mantle are: 0.8 to 1.25 percent Al+1/2Fe (ammonium oxalate), 25 to 40 percent phosphate retention and greater than 20 percent glass content; does not have an eluvial E horizon; dry 45 to 60 consecutive days in summer (xeric moisture regime)
GEOGRAPHIC SETTING:
Landform: sideslopes of moraines
Slope gradient: 0 to 50 percent
Parent material: volcanic ash overlying till
Lithology: till (mostly tuffs)
Elevation: 5,000 to 6,000 feet
Climate: cold, wet winters and cool, moist summers
Mean annual precipitation: 25 to 35 inches
Mean annual air temperature: 37 to 40 degrees F
Frostfree period: 30 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bandarrow: on poorly drained, wet mountain meadows and floodplains with aquic conditions within 18 inches; under slender cinquefoil, bog St. John's wort, panicled bulrush, tufted hairgrass,
Baltic rush, alpine timothy and Kentucky bluegrass
Bata: on moraines in glaciated mountain valleys with glossic horizon and skeletal argillic horizon; under lodgepole pine, subalpine fir, western larch, prince's pine, skunk-leaved polemonium, roundleaf violet and pinegrass
Haashollow: on concave glaciated backslopes and footslopes; very deep soil in till; thick volcanic ash mantle over loamy-skeletal argillic horizon; under subalpine fir, western larch, Engelmann spruce, big huckleberry, prince's pine, roundleaf violet, pinegrass and northwest sedge
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderately slow
USE AND VEGETATION:
Use: watershed, wildlife habitat, timber production and recreation
Native vegetation: lodgepole pine, subalpine fir, Engelmann spruce, grouse huckleberry, bearberry, Oregon boxwood, lupines, pussytoes, blueleaf strawberry, skunk-leaved polemonium, common yarrow, northwestern sedge, pinegrass and elk sedge
Plant association: PICO (ABLA)/VASC/POPU (lodgepole pine (subalpine fir)/grouse huckleberry/skunk-leaved polemonium); may include: ABLA/VASC (subalpine fir/grouse huckleberry)
DISTRIBUTION AND EXTENT:
Distribution: MLRA 43c; Blue and Seven Devils Mountains
Extent: small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wallowa-Whitman National Forests, 2012.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
cambic horizon: 1 to 14 inches; Bw horizon
eluvial horizon, buried: 14 to 22 inches; 2Eb horizon
argillic horizon, buried: 29 to 49 inches; 2Btb horizon
andic soi properties: 1 to 14 inches; Bw horizon
particle-size control section: 29 to 49 inches; 2Btb horizon
National Cooperative Soil Survey
U.S.A.