LOCATION SHAGEL                  ID

Established Series
Rev. KA/DJJ/CLM
11/2010

SHAGEL SERIES

The Shagel series consists of shallow well drained soils that formed in residuum and colluvium from rhyolite. Shagel soils are on mountains and foothills. Permeability is moderate and slopes range from 1 to 60 percent. The mean annual precipitation is about 12 inches and the mean annual temperature is about 40 degrees F.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Aridic Lithic Calcixerolls

TYPICAL PEDON: Shagel gravelly silt loam - on a southeast- facing convex slope of 3 percent, under low sagebrush and bluebunch wheatgrass at 5,760 feet elevation. (On November 5, 1981 when described, soil was moist to 3 inches. Colors are for dry soil unless otherwise noted.)

A1--0 to 3 inches; grayish brown (10YR 5/2); gravelly silt loam; very dark grayish brown (10YR 3/2) moist; weak fine platy structure parting to moderate medium and fine granular; soft, very friable; slightly sticky and slightly plastic; common fine and very fine, few medium and coarse roots; many very fine tubular pores; 15 percent gravel; moderately alkaline (pH 8.0); clear wavy boundary. (2 to 5 inches thick)

A2--3 to 7 inches; brown (10YR 5/3) gravelly silt loam; dark brown (10YR 3/3) moist; moderate medium and fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common fine and very fine, few medium and coarse roots; common very fine tubular pores; 30 percent gravel; strongly effervescent; moderately alkaline (pH 8.2); clear wavy boundary. (2 to 5 inches thick)

Bt--7 to 11 inches; pale brown (10YR 6/3) gravelly silt loam; brown (10YR 4/3) moist; moderate coarse and medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common fine and very fine, few coarse and medium roots; common very fine tubular pores; few thin clay films on ped faces; 30 percent gravel; violently effervescent (11 percent calcium carbonate); moderately alkaline (pH 8.2); abrupt wavy boundary. (0 to 6 inches thick)

Bk--11 to 19 inches; very pale brown (10YR 7/3) extremely gravelly silt loam; brown (10YR 5/3) moist; massive; soft, very friable, slightly sticky and slightly plastic; few medium, fine and very fine roots; few very fine tubular pores; 60 percent gravel and 5 percent cobbles; violently effervescent (25 percent calcium carbonate); moderately alkaline (pH 8.4); abrupt smooth boundary. (6 to 8 inches thick)

2R--19 inches; lime coated rhyolite.

TYPE LOCATION: Clark County, Idaho; about 4 miles west and 2 miles north of Small, Idaho 1,800 feet west 2,150 feet south of northeast corner of section. 33, T. 11 N., R. 34 E.

RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 7 to 10 inches
Depth to bedrock - 12 to 20 inches
Depth to calcic horizon - 9 to 14 inches
Mean annual soil temperature - 40 to 44 degrees F.
Soil moisture regime-aridic
Control section
Clay - 6 to 15 percent
Rock fragments - 50 to 90 percent
Carbonates (as calcium carbonate) - 18 to 32 percent

A horizon
Reaction - slightly alkaline or moderately alkaline
Color value, dry - 4 or 5
Value, moist - 2 or 3
Chroma, dry and moist - 2 or 3

Bt horizon
Reaction - slightly alkaline or moderately alkaline
Color value, dry - 5 or 6
Value, moist - 3 or 4
Chroma, dry and moist - 3 or 4
Textures - silt loam, very gravelly silt loam, extremely gravelly silt loam, cobbly silt loam, very gravelly loam

Bk horizon
Reaction - moderately alkaline or strongly alkaline
Color value, dry - 5 through 8
Value, moist - 4 through 8
Chroma, dry and moist - 1 through 4
Textures - very gravelly loam, extremely gravelly loam, or extremely gravelly silt loam
Bkq horizons are present in some pedons immediately above the bedrock

COMPETING SERIES: This is sthe Onkeyo series. Onkeyo soils have 27 to 35 percent clay in the particle-size control section.

GEOGRAPHIC SETTING: Shagel soils are on mountains and foothills at elevations of 5,000 to 7,300 feet. Slopes range from 1 to 20 percent. Shagel soils formed in colluvium and residuum from rhyolite. The mean annual precipitation is 10 to 14 inches; the mean annual air temperature is 38 to 42 degrees F; the mean summer temperature ranges from 58 to 63 degrees F. The frost-free period is 65 to 95 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Deecree (T), Medicine, Small (T), Truble (T), and Westindian (T) series. Deecree and Medicine soils are very deep formed in mixed alluvium. Small soils are moderately deep and have an argillic horizon. Truble soils are moderately deep and have strongly contrasting particle sizes in the textural control section. Westindian soils are moderately deep to a thick, hard, indurated duripan formed in mixed alluvium on alluvial terrace slopes.

DRAINAGE AND PERMEABILITY: Well drained; permeability is moderate; runoff is slow to rapid.

USE AND VEGETATION: Dominant use is rangeland and wildlife habitat. Principal vegetation is low sagebrush, bluebunch wheatgrass, prairie junegrass, and winterfat.

DISTRIBUTION AND EXTENT: Shagel soils are inextensive in southeastern Idaho.

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

SERIES ESTABLISHED: Butte County Area, Idaho; 1997.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 0 to 7 inches (A1 and A2 horizons)
Calcic horizon - the zone from 11 to 19 inches (Bk horizon)
Lithic contact - at 19 inches
Particle-size control section - the zone from 10 to 19 inches (part of the Bt horizon and the Bk horizon)

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National Cooperative Soil Survey
U.S.A.