LOCATION ARAVETON                ID

Established Series
Rev. RAS/WGH/CBR
05/2018

ARAVETON SERIES

Landscape--plains, valleys, foothills, mountains
Landform--valley floors, fan remnants, hills, mountain slopes, ridges
Slope--0 to 60 percent
Parent material--loess-influenced alluvium or colluvium
Mean annual precipitation--about 350 mm
Mean annual air temperature--about 6 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Calcic Haploxerolls

TYPICAL PEDON: Araveton extremely stony loam in an area of grassland (Colors are for dry soil unless otherwise noted.)

A1--0 to 10 cm; dark grayish brown (10YR 4/2) extremely stony loam, very dark brown (10YR 2/2) moist; moderate very fine and fine granular structure; hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine irregular pores; 10 percent stones; neutral (pH 6.8); gradual smooth boundary.

A2--10 to 18 cm; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine tubular pores; 10 percent stones; neutral (pH 7.0); gradual smooth boundary.

Bw--18 to 41 cm; brown (10YR 5/3) stony loam, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine tubular pores; 15 percent stones; neutral (pH 7.0); clear wavy boundary.

Bk1--41 to 61 cm; pale brown (10YR 6/3) stony loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine tubular pores; common threadlike calcium carbonate masses throughout; common calcium carbonate coatings on rock fragments; 20 percent angular stones; strongly effervescent; slightly alkaline (pH 7.6); clear wavy boundary.

Bk2--61 to 97 cm; pale brown (10YR 6/3) stony loam, brown (10YR 5/3) moist; massive; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine tubular pores; finely disseminated calcium carbonate; 25 percent angular stones; violently effervescent; slightly alkaline (pH 7.8); gradual wavy boundary.

Bk3--97 to 132 cm; light gray (2.5Y 7/2) loam, grayish brown (2.5Y 5/2) moist; massive; hard, friable, slightly sticky and slightly plastic; few very fine and fine roots; many very fine and fine tubular pores; common threadlike calcium carbonate masses throughout; common calcium carbonate coatings on rock fragments; 10 percent angular stones; strongly effervescent; slightly alkaline (pH 7.6); clear wavy boundary.

Bk4--132 to 168 cm; very pale brown (10YR 7/3) very stony loam, brown (7.5YR 5/3) moist; massive; hard, firm, slightly sticky and slightly plastic; few very fine roots; many very fine and fine tubular pores; common threadlike calcium carbonate masses throughout; 40 percent angular stones; strongly effervescent; slightly alkaline (pH 7.6).

TYPE LOCATION: Bingham County, Idaho; latitude 43.07431 degrees north, longitude 111.93198 west, datum WGS 84

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--4.4 to 8.3 degrees C
Thickness of mollic epipedon--18 to 43 cm
Depth to secondary calcium carbonate--41 to 91 cm

Particle-size control section (weighted averages)
Clay content--18 to 27 percent
Total rock fragment content--5 to 30 percent

A horizon
Value--4 to 6 dry, 2 or 3 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--loam, silt loam
Clay content--12 to 26 percent
Total rock fragment content--0 to 30 percent
Gravel content--0 to 20 percent
Cobble content--0 to 12 percent
Stone content--0 to 25 percent
Reaction--pH 6.6 to 8.4
Thickness--18 to 36 cm

Bw horizon
Value--4 to 6 dry, 3 to 5 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--loam, silt loam
Clay content--18 to 26 percent

Total rock fragment content--0 to 20 percent
Gravel content--0 to 20 percent
Cobble content--0 to 10 percent
Stone content--0 to 15 percent
Reaction--pH 6.6 to 8.4
Thickness--18 to 48 cm

Bk horizon
Hue--2.5Y to 7.5YR
Value--4 to 8 dry, 4 to 7 moist
Chroma--2 to 4 dry or moist
Texture (less than 2-mm fraction)--loam, silt loam, sandy loam
Clay content--18 to 26 percent
Total rock fragment content--0 to 50 percent
Gravel content--0 to 25 percent
Cobble content--0 to 20 percent
Stone content--3 to 25 percent
Reaction--pH 6.6 to 8.4
Calcium carbonate equivalent--1 to 35 percent

COMPETING SERIES:
Causey--15 to 65 percent paragravel in Bk horizon
Kerl--no calcic horizon
Kuvasz--moderately deep to lithic contact
Picayune--clay loam and silty clay loam in Bw horizon
Reavis--lithologic discontinuity

GEOGRAPHIC SETTING:
Elevation--1370 to 2090 m
Mean annual precipitation--300 to 700 mm
Mean annual air temperature--2.2 to 8.0 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 25 um/sec

USE AND VEGETATION:
Major uses--nonirrigated cropland, rangeland
Potential natural vegetation--threetip sagebrush, bluebunch wheatgrass, phlox

DISTRIBUTION AND EXTENT: Moderate extent in southeastern Idaho; MLRA 13

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

SERIES ESTABLISHED: Bingham County, Idaho; 1972

REMARKS:
Diagnostic horizons and other features in this pedon
Mollic epipedon--zone from the surface to a depth of 18 cm
Cambic horizon--zone from 18 to 41 cm
Calcic horizon--zone from 41 to 168 cm
Particle-size control section--25 to 100 cm

Taxonomic version--Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.