LOCATION PINEBUTTE               ID

Established Series
Rev. KDA/RGK/CBR/EED
05/2018

PINEBUTTE SERIES

Landscape--plains
Landform--lava plains
Slope--1 to 12 percent
Parent material--loess-influenced colluvium over basalt
Mean annual precipitation--about 450 mm
Mean annual air temperature--about 6 degrees C
Depth class--deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--cryic

TAXONOMIC CLASS: Fine-silty, mixed, superactive Pachic Argicryolls

TYPICAL PEDON: Pinebutte silt loam on a 6-percent slope in an area of rangeland at an elevation of 1859 m

A1--0 to 8 cm; silt loam, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and common fine roots; common very fine tubular pores; moderately acid (pH 5.7); clear wavy boundary

A2--8 to 18 cm; silt loam, brown (10YR 4/3) dry, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine tubular pores; slightly acid (pH 6.2); clear wavy boundary

Bt1--18 to 28 cm; silt loam, brown (10YR 4/3) dry, dark brown (10YR 3/3) moist; moderate medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine tubular pores; very few thin clay films lining pores; slightly acid (pH 6.4); clear wavy boundary

Bt2--28 to 48 cm; silty clay loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; moderate coarse subangular blocky structure parting to moderate medium subangular blocky; hard, firm, sticky and plastic; few very fine and fine roots; common very fine tubular pores; common thick clay films lining pores and on faces of peds; neutral (pH 6.6); gradual wavy boundary

Bt3--48 to 89 cm; silty clay loam, yellowish brown (10YR 5/4) dry, brown (10YR 4/3) moist; moderate medium prismatic structure parting to moderate coarse and medium subangular blocky; hard, firm, sticky and plastic; few very fine and fine roots; common very fine tubular pores; common thick clay films lining pores and on faces of peds; neutral (pH 6.9); gradual wavy boundary

Bt4--89 to 104 cm; silt loam, pale brown (10YR 6/3) dry, brown (10YR 5/3) moist; moderate medium subangular blocky structure parting to moderate fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; few moderately thick clay films lining pores and on faces of peds; neutral (pH 7.2); abrupt wavy boundary

Bk1--104 to 117 cm; silt loam, white (10YR 8/1) dry, pale brown (10YR 6/3) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine tubular pores; violently effervescent (20 percent calcium carbonate); moderately alkaline (pH 7.9); clear wavy boundary

Bk2--117 to 122 cm; silt loam, light gray (10YR 7/2) dry, brown (10YR 5/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; violently effervescent (18 percent calcium carbonate); slightly alkaline (pH 7.8); abrupt smooth boundary

2R--122 cm; lime-coated vesicular basalt

TYPE LOCATION: Fremont County, Idaho; latitude 44.17257 degrees north, longitude 111.72467 degrees west, datum WGS 84 (coordinates estimated from PLSS data)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4 to 7 degrees C
Depth to bedrock--100 to 150 cm
Thickness of mollic epipedon--41 to 66 cm
Depth to secondary carbonates--89 to 114 cm
Depth to calcic horizon--100 to 114 cm

Particle-size control section
Clay content--18 to 30 percent
Sand content--less than 15 percent (by weight) particles 0.1 to 75.0 mm in diameter
Total rock fragment content--0 to 5 percent

A horizon
Value--3 or 4 dry
Chroma--1 to 3 dry or moist
Reaction--5.6 to 7.3 (moderately acid to neutral)
Thickness--18 to 36 cm

Bt horizon
Value--4 to 6 dry, 3 to 5 moist
Chroma--3 or 4 dry or moist
Texture--silt loam, silty clay loam
Reaction--6.1 to 7.8 (slightly acid to slightly alkaline)
Thickness--50 to 100 cm

Bk horizon
Hue--2.5Y, 10YR
Value--6 to 8 dry, 5 or 6 moist
Chroma--1 to 3 dry or moist
Texture--silt loam, silty clay loam
Calcium carbonate equivalent--15 to 35 percent
Reaction--6.6 to 7.8 (neutral to slightly alkaline)
Thickness--15 to 30 cm

COMPETING SERIES:
Bozeman--lithic contact at a depth of more than 150 cm (very deep); ustic soil moisture regime
Bustle, Greybo, Jedediah--lithic contact at a depth of more than 150 cm (very deep); udic soil moisture regime
Lanark, Robana--lithic contact at a depth of more than 150 cm (very deep)

GEOGRAPHIC SETTING:
Elevation--1770 to 1950 m
Climate--warm summers, cold winters
Mean annual precipitation--380 to 510 mm
Mean annual air temperature--4 to 7 degrees C
Frost-free period--40 to 80 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Katseanes--lithic contact at a depth of less than 50 cm (shallow); on adjacent hillslopes
Hagenbarth--lithic contact at a depth of more than 150 cm (very deep); in similar positions on undulating basalt plains

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately low

USE AND VEGETATION:
Major use--livestock grazing
Potential natural vegetation--mountain big sagebrush, antelope bitterbrush, Idaho fescue, needlegrass, lupine

DISTRIBUTION AND EXTENT: Eastern Idaho Plateaus, Idaho; MLRA 13; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Fremont County, Idaho; 1989

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 48 cm
*Argillic horizon--zone from 18 to 104 cm
*Calcic horizon--zone from 104 to122 cm
*Particle-size control section--zone from 18 to 68 cm

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National Cooperative Soil Survey
U.S.A.