LOCATION WAYWEST ID
Tentative Series
Rev. BAG/CBR/DJP
11/2017
WAYWEST SERIES
The Waywest series consists of very deep, well drained soils that formed in loess influenced alluvium derived from mixed sources. Waywest soils are on valley floors and alluvial fans. Slopes range from 1 to 25 percent. Mean annual precipitation is about 500 mm, and mean annual air temperature is about 2.0 degrees C.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Waywest silt loam, in rangeland (colors are for dry soil unless otherwise noted).
A1--0 to 6 cm; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2), moist; moderate fine granular structure; soft, very friable, nonsticky, nonplastic; many very fine and fine roots throughout; many very fine and fine interstitial pores; neutral (pH 6.6); clear smooth boundary.
A2--6 to 22 cm; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2), moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; common very fine and fine roots throughout; common very fine and fine tubular and irregular pores; slightly acid (pH 6.5); gradual smooth boundary.
AB--22 to 45 cm; brown (10YR 4/3) silt loam, dark brown (10YR 3/3), moist; strong fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; common very fine and fine roots throughout; common very fine and fine tubular and irregular pores; 2 percent gravel; neutral (pH 6.6); gradual smooth boundary.
Bw1--45 to 60 cm; pale brown (10YR 6/3) loam, brown (10YR 4/3), moist; strong medium subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; common very fine and fine roots throughout; common very fine and fine tubular and irregular pores; 5 percent gravel; neutral (pH 6.7); gradual wavy boundary.
Bw2--60 to 110 cm; light yellowish brown (10YR 6/4) fine sandy loam, dark yellowish brown (10YR 4/4), moist; moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, nonplastic; few very fine roots throughout; few very fine and fine irregular and interstitial pores; 10 percent gravel; neutral (pH 6.8); gradual wavy boundary.
Bw3--110 to 150 cm; light yellowish brown (10YR 6/4) gravelly loamy fine sand, dark yellowish brown (10YR 4/4), moist; weak coarse subangular blocky structure; soft, very friable, nonsticky, nonplastic; common very fine and fine interstitial pores; 25 percent gravel; neutral (pH 6.8).
TYPE LOCATION: Caribou County, Idaho; 42 degrees 56 minutes 16.67 seconds north latitude and 111 degrees 28 minutes 50.92 seconds west longitude, WGS84.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 2.0 to 5.0 degrees C.
Mollic epipedon thickness - 40 to 75 cm
Particle-size control section (weighted average):
Clay content - 10 to 18 percent
Rock fragments - 5 to 30 percent
A1, A2 horizons
Value: 4 or 5 dry; 2 or 3 moist
Chroma: 2 or 3; dry or moist
Texture (less than 2 mm fraction): silt loam, loam
Clay content: 10 to 18 percent
Reaction: pH 6.4 to 7.0
Thickness: 20 to 45 cm
AB horizon
Value: 4 or 5 dry; 2 or 3 moist
Chroma: 2 or 3; dry or moist
Texture (less than 2 mm fraction): silt loam, loam
Clay content: 10 to 18 percent
Rock fragments: 0 to 5 percent gravel
Reaction: pH 6.4 to 7.2
Thickness: 0 to 40 cm
Bw1 horizon
Hue: 7.5YR or 10YR; dry or moist
Value: 4 to 6 dry; 3 or 4 moist
Chroma: 3 or 4; dry or moist
Texture (less than 2 mm fraction): silt loam, loam
Clay content: 10 to 18 percent
Rock fragments: 2 to 10 percent gravel
Reaction: pH 6.4 to 7.2
Thickness: 10 to 50 cm
Bw2 and Bw3 horizons
Hue: 7.5YR or 10YR; dry or moist
Value: 4 to 6 dry; 3 or 4 moist
Chroma: 3 or 4; dry or moist
Texture (less than 2 mm fraction): loamy fine sand, fine sandy loam
Clay content: 6 to 15 percent
Rock fragments: 5 to 30 percent gravel
Reaction: pH 6.4 to 7.2
Thickness: 40 to 70 cm
COMPETING SERIES:
Aycab - is moderately deep to a paralithic contact
Brownsgulch - has an ustic moisture regime
Coffepot -is deep to a paralithic contact
Coutis - has an ustic moisture regime
Earcree - does not have a cambic horizon
Fleecer - has an ustic moisture regime
Foxvire - has a xeric moisture regime bordering on aridic
Gardners Fork - has an udic moisture regime
Grayhead - has an ustic moisture regime
Hailman - is deep to a paralithic contact
Moonlight - has an udic moisture regime
Naz - has an udic moisture regime
Razorba - has an ustic moisture regime
Shook - has an ustic moisture regime
Skyway -is moderately deep to a lithic contact
Taral - has an udic moisture regime
Tosp - has an udic moisture regime
GEOGRAPHIC SETTING:
Landform - valley floors and alluvial fans
Elevation - 1,890 to 2,010 meters
Slope - 1 to 25 percent
Parent material - loess influenced alluvium derived from mixed sources
Mean annual precipitation - 450 to 550 mm
Mean annual air temperature - 0.6 to 3.0 degrees C.
Frost-free period - 30 to 65 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained, 5.0 - 200.0 um/sec.
USE AND VEGETATION: Waywest soils are primarily used for rangeland. The potential native vegetation is mountain big sagebrush, rabbitbrush, Idaho fescue, and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Waywest soils are of small extent in southeast Idaho; MLRA 43B.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Caribou County, Idaho, Caribou County Area, Soil Survey, 2017. The series name is derived from the USGS Wayan West, Idaho topographic quadrangle.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 0 to 45 cm (A1, A2, and AB horizons)
Cambic horizon - 45 to 150 cm (Bw1, Bw2, and Bw3 horizons)
Particle-size control section - 25 to 100 cm (part of AB, Bw1, and part of Bw2 horizons)
Waywest soils have a cryic temperature regime and a xeric moisture regime.
Taxonomic version: Twelfth Edition, 2014
National Cooperative Soil Survey
U.S.A.