LOCATION CLEMENTSVILLE ID

Established Series
Rev. CBR/TDT
04/2011

CLEMENTSVILLE SERIES

The Clementsville series consists of moderately deep, well drained soils that formed in residuum weatherd from rhyolite a with loess influence. Clementsville soils are on mountain slopes and have slopes of 4 to 12 percent. The mean annual precipitation is about 530 mm and the mean annual air temperature is about 3.3 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Calcic Pachic Haplocryolls

TYPICAL PEDON: Clementsville silt loam, cultivated, on a 9 percent mountain slope at an elevation of 2,032 meters. (Colors are for dry soil unless otherwise noted)

Ap1--0 to 8 cm; dark grayish brown (10YR 4/2) silt loam, very dark brown (7.5YR 2.5/2) moist; moderate fine granular structure; slightly hard, very friable, slightly sticky and nonplastic; many very fine and common fine roots; many very fine irregular pores; 5 percent gravel; slightly alkaline (pH 7.6); abrupt smooth boundary.

Ap2--8 to 17 cm; dark grayish brown (10YR 4/2) silt loam, very dark brown (7.5YR 2.5/2) moist; weak fine subangular blocky structure parting to moderate fine granular; slightly hard, very friable, slightly sticky and nonplastic; many very fine and common fine roots; many very fine irregular pores; 5 percent gravel; neutral (pH 6.8); abrupt wavy boundary. (Combined thickness of the A horizons is 10 to 23 cm)

Bw1--17 to 34 cm; brown (10YR 4/3) silt loam, dark brown (7.5YR 3/2) moist; moderate medium subangular blocky structure; hard, friable, moderately sticky and slightly plastic; common very fine and fine roots; many very fine tubular pores; 10 percent gravel; neutral (pH 7.2); abrupt wavy boundary.

Bw2--34 to 50 cm; brown (10YR 5/3) very gravelly loam, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; common very fine roots; many very fine tubular pores; 30 percent medium gravel and 25 percent fine gravel; slightly alkaline (pH 7.4); abrupt smooth boundary. (Combined thickness of the Bw horizons is 33 to 59 cm)

Bk--50 to 62 cm; pale brown (10YR 6/3) extremely gravelly loam, brown (10YR 5/3) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; common very fine roots; common very fine tubular pores; calcium carbonate coats and silica coats on all surfaces of rock fragments; root mat on top of channers including many very fine and fine roots; 45 percent gravel, 15 percent channers and 10 percent cobbles; strongly effervescent (26 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); clear wavy boundary. (10 to 24 cm thick)

Bkq--62 to 88 cm; very pale brown (10YR 7/3) extremely cobbly loam, yellowish brown (10YR 5/4) moist; massive; loose, slightly sticky and nonplastic; common very fine and fine and few medium roots; common very fine tubular pores; discontinuous laminar cap at 70 cm; calcium carbonate coats and silica coats on all surfaces of rock fragments; root mat on top of flagstones including many very fine and fine roots; 40 percent gravel, 20 percent cobbles and 10 percent flagstones; violently effervescent (38 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); abrupt smooth boundary.

R--88 cm; rhyolite.

TYPE LOCATION: Teton County, Idaho; about 18.6 km west of Tetonia; 126 meters north and 748 meters east of the southwest corner of section 28, T. 6 N., R. 43 E.; Wright Creek USGS topographic quadrangle; lat. 43 degrees, 48 minutes, and 44.0 seconds N., and long. 111 degrees, 23 minutes, and 29.8 seconds W., NAD83.

RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 40 to 85 cm
Depth to calcic horizon: 43 to 80 cm
Depth to bedrock: 50 to 100 cm
Particle size control section average rock fragments: 35 to 60 percent
Particle size control section total clay: 18 to 27 percent
Particle size control section noncarbonate clay: 18 to 22 percent
Calcium carbonate equivalent in the calcic chorizon: 15 to 38 percent
Soil moisture regime: xeric
Mean annual soil temperature: 3.9 to 7.2 degrees C. (cryic soil temperature regime)
Mean summer soil temperature: 10.0 to 15.0 degrees C.

A or Ap horizon
Hue: 7.5YR or 10YR moist
Value: 2 or 3 moist, 3 or 4 dry
Chroma: 2 or 3 moist and dry
Rock Fragments: 5 to 10 percent total; 5 to 10 percent gravel and 0 to 5 percent channers and 0 to 5 percent cobbles
Reaction: slightly acid to slightly alkaline

Bw horizons
Value: 2 or 3 moist, 4 or 5 dry
Chroma: 2 or 3 moist, 2 to 4 dry
Fine-earth texture: SIL or L with 10 to 55 percent rock fragments; 10 to 55 percent gravel and 0 to 5 percent channers and 0 to 5 percent cobbles

Bk or Bk1 horizon
Value: 4 to 6 moist, 6 to 8 dry
Chroma: 3 or 4 moist, 2 or 3 dry
Fine-earth texture: L with 55 to 85 percent rock fragments; 35 to 80 percent gravel, 0 to 20 percent cobbles, 0 to 20 percent channers and 0 to 30 percent flagstones
Effervescence: strong to violent

Bk2 or Bkq horizon
Chroma: 3 or 4 moist
Fine-earth texture: L with 55 to 85 percent rock fragments; 35 to 80 percent gravel, 0 to 20 percent cobbles, 0 to 20 percent channers and 5 to 40 percent flagstones

COMPETING SERIES: These are the Eganroc, Firading, Levengood, Meegernot, Polumar, Raynoldson, Spearhead and Stoneman series. Eganroc soils have a calcic horizon at depths of 23 to 38 cm. Firading soils do not have flagstones in the particle size control section. Levengood, Meegernot, Raynoldson and Stoneman soils are very deep. Polumar and Spearhead soils are deep.

GEOGRAPHIC SETTING:
Landscape: mountains
Landform: mountain slopes
Elevation: 1,794 to 2,213 meters
Slope: 4 to 12 percent
Parent material: rhyolite residuum with loess influence
Mean annual air temperature: 2.8 to 5.0 degrees C.
Mean annual precipitation: 457 to 660 mm
Frost free period: 30 to 55 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ard and Chokecherry soil series. Ard soils occur on the same landform in linear-convex positions. Chokecherry soils occur on swales in linear-concave positions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: medium
Saturated hydraulic conductivity: moderately high

USE AND VEGETATION:
Major uses: Most areas are cultivated. Wheat, oats, and barley are the major crops.
Dominant native vegetation: mountain big sagebrush, tapertip hawksbeard, slender wheatgrass, Idaho fescue, and bluebunch wheatgrass

DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho and Western Wyoming, MLRA 13
Extent: the series is not extensive

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Teton County, Idaho, 2011; Teton Area, Idaho and Wyoming Soil Survey

REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 50 cm
Calcic horizon: from a depth of 50 to 88 cm
Lithic contact: from a depth of 88 cm
Particle size control section: from a depth of 25 to 88 cm
Soil temperature regime: cryic
Soil moisture regime: xeric

ADDITIONAL DATA:
Typical pedon was not sampled.

National Cooperative Soil Survey
U.S.A.