LOCATION BUIST ID
Established Series
Rev. SM/RGK/CBR/EED
05/2018
BUIST SERIES
Landscape--valleys, hills, mountains, alluvial plains, tablelands
Landform--fan remnants, hillslopes, mountain slopes, plateaus, valley floors, stream terraces
Slope--0 to 60 percent
Parent material--loess-influenced alluvium
Mean annual precipitation--about 400 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Calcic Haploxerolls
TYPICAL PEDON: Buist gravelly silt loam in an area of irrigated cropland (Colors are for dry soil unless otherwise noted.)
Ap1--0 to 5 cm; brown (10YR 5/3) gravelly silt loam, dark brown (10YR 3/3) moist; weak medium platy structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium, and few coarse roots; many very fine irregular pores; 15 percent gravel and 5 percent cobbles; slightly alkaline (pH 7.4); abrupt smooth boundary
Ap2--5 to 25 cm; brown (10YR 4/3) cobbly silt loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium, and few coarse roots; many very fine irregular pores; 10 percent gravel and 15 percent cobbles; slightly alkaline (pH 7.7); abrupt smooth boundary
BA--25 to 43 cm; brown (10YR 4/3) cobbly silt loam, dark brown (10YR 3/3) moist; moderate medium and coarse subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium, and few coarse roots; few very fine irregular pores; 10 percent gravel and 20 percent cobbles; slightly alkaline (pH 7.7); clear wavy boundary
Bk1--43 to 58 cm; yellowish brown (10YR 5/4) very gravelly loam, dark yellowish brown (10YR 4/4) moist; weak medium and coarse angular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; common very fine irregular pores; finely disseminated calcium carbonate; 30 percent gravel and 10 percent cobbles; slightly effervescent; slightly alkaline (pH 7.8); clear wavy boundary
Bk2--58 to 84 cm; light yellowish brown (10YR 6/4) extremely gravelly sandy loam, dark yellowish brown (10YR 4/4) moist; weak coarse subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine irregular pores; common calcium carbonate coatings on bottom of rock fragments; 50 percent gravel and 30 percent cobbles; strongly effervescent; moderately alkaline (pH 8.1); abrupt wavy boundary
Bk3--84 to 94 cm; pale brown (10YR 6/3) extremely gravelly loam, dark yellowish brown (10YR 4/4) moist; weak coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine tubular pores; common carbonate coatings on bottom of rock fragments; 60 percent gravel and 20 percent cobbles; violently effervescent; moderately alkaline (pH 8.1); clear wavy boundary
Bk4--94 to 155 cm; very pale brown (10YR 8/2) extremely gravelly sandy loam, very pale brown (10YR 7/4) moist; weak coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine tubular pores; common calcium carbonate coatings on bottom of rock fragments; 50 percent gravel and 30 percent cobbles; violently effervescent; moderately alkaline (pH 8.3)
TYPE LOCATION: Bear Lake County, Idaho; latitude 42.55278 degrees north, longitude 111.41806 degrees west, datum WGS 84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3.9 to 7.8 degrees C
Thickness of mollic epipedon--20 to 48 cm
Depth to calcic horizon--20 to 56 cm
Particle-size control section (weighted averages)
Clay content--5 to 18 percent
Total rock fragment content--35 to 75 percent
Calcium carbonate equivalent--15 to 40 percent
A or Ap horizon
Value--3 to 5 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Texture (less than 2-mm fraction)--loam, silt loam
Clay content--10 to 20 percent
Reaction--pH 7.2 to 7.9
Thickness--10 to 38 cm
BA horizon (where present)
Value--4 to 6 dry, 3 to 5 moist
Chroma--2 or 3 dry or moist
Texture (less than 2-mm fraction)--loam, silt loam
Clay content--10 to 20 percent
Total rock fragment content--5 to 45 percent
Gravel content--5 to 30 percent
Cobble content--0 to 20 percent
Reaction--pH 7.4 to 7.8
Thickness--0 to 18 cm
Bk1 horizon
Hue--10YR, 7.5YR
Value--5 to 7 dry, 4 to 6 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--silt loam, loam, sandy loam
Clay content--10 to 20 percent
Total rock fragment content--15 to 50 percent
Gravel content--2 to 35 percent
Cobble content--0 to 15 percent
Stone content--0 to 15 percent
Calcium carbonate equivalent--2 to 30 percent
Reaction--pH 7.4 to 8.4
Thickness--13 to 20 cm
Bk2, Bk3, and Bk4 horizons, and 2Bk3 horizon (where present)
Hue--10YR, 7.5YR
Value--5 to 8 dry, 4 to 7 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--loam, sandy loam, fine sandy loam
Clay content--5 to 20 percent
Total rock fragment content--35 to 85 percent
Gravel content--2 to 60 percent
Cobble content--5 to 35 percent
Stone content--0 to 25 percent
Calcium carbonate equivalent--10 to 40 percent
Reaction--pH 7.9 to 8.5
2Bk4 horizon (where present)
Hue--10YR or 7.5YR dry or moist
Value--6 to 8 dry, 4 or 5 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--loamy sand, loamy coarse sand
Clay content--1 to 5 percent
Total rock fragment content--60 to 85 percent
Gravel content--55 to 80 percent
Cobble content--5 to 10 percent
Calcium carbonate equivalent--10 to 40 percent
Reaction--pH 8.0 to 8.4
COMPETING SERIES:
Bailey-flagstones and channers in particle-size control section; 5 to 10 percent calcium carbonate equivalent throughout calcic horizon
Conner,
Conneridge,
Ireland,
Jebo,
Pedleford--moderately deep to lithic contact
Cooley--less than 15 percent calcium carbonate in calcic horizon
Dagan--hue of 7.5YR or redder in Bk horizon; 25 to 65 percent coarse fragments in A horizon
Hondoho--more than 18 percent clay in particle-size control section
Niarada--no calcium carbonates in cambic horizon
Tuckerdowns--more than 18 percent clay in particle-size control section
GEOGRAPHIC SETTING:
Elevation--1490 to 2250 m
Mean annual precipitation--200 to 550 mm
Mean annual air temperature--2.2 to 7.2 degrees C
Frost-free period--60 to 110 days
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--5 to 50 um/sec
USE AND VEGETATION:
Major uses--irrigated and nonirrigated cropland, rangeland
Potential natural vegetation--mountain big sagebrush, antelope bitterbrush, snowberry, serviceberry, rabbitbrush, bluebunch wheatgrass, Nevada bluegrass, Sandberg bluegrass, thickspike wheatgrass, arrowleaf balsamroot, longleaf hawksbeard
DISTRIBUTION AND EXTENT: Small extent in southeastern Idaho; MLRAs 12 and 13
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Oneida County, Idaho; 1994
REMARKS:
Diagnostic horizons and other features recognized in this pedon
Mollic epipedon--zone from the surface to a depth of 43 cm (A1, A2, and BA horizons)
Calcic horizon--zone from 58 to 155 cm (Bk2, Bk3, and Bk4 horizons)
Particle-size control section--zone from 25 to 100 cm (BA, Bk1, Bk2, and Bk3 horizons; part of Bk4 horizon)
Some pedons have a discontinuity.
Taxonomic version--Twelfth Edition, 2014
National Cooperative Soil Survey
U.S.A.