LOCATION ENGLEJARD MTEstablished Series
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive Ustic Haplocryolls
TYPICAL PEDON: Englejard loam, in rangeland (colors are for dry soil unless otherwise noted).
A--0 to 9 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; weak medium and fine subangular blocky structure parting to weak fine and very fine granular; soft, very friable, slightly sticky and non-plastic; many very fine and few fine roots; many fine and very fine dendritic tubular pores; 5 percent gravel; slightly acid (pH 6.5); clear wavy boundary. (8 to 15 inches thick)
Bw--9 to 27 inches; very pale brown (10YR 7/4) very fine sandy loam, yellowish brown (10YR 5/4) moist; moderate medium and fine subangular blocky structure; slightly hard, friable, slightly sticky and non-plastic; common very fine and few fine roots; common very fine and few fine dendritic tubular pores; 5 percent gravel; neutral (pH 7.1); clear wavy boundary. (6 to 20 inches thick)
BC--27 to 35 inches; light yellowish brown (10YR 6/4) fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine and very fine granular structure; soft, very friable, slightly sticky and non-plastic; few very fine roots; many very fine irregular pores; 10 percent gravel; neutral (pH 6.9); clear wavy boundary. (0 to 20 inches thick)
2C--35 to 60 inches; very pale brown (10YR 7/3) very gravelly loamy sand, yellowish brown (10YR 5/4) moist; single grain; loose, non-sticky and non-plastic; 40 percent gravel; neutral (pH 6.9).
TYPE LOCATION: Beaverhead County, Montana; approximately 1000 feet north and 2350 feet west of the SE corner of sec. 3, T 2 S., R 15 W; USGS Mud Lake, Montana topographic quadrangle; North American Datum 83, zone 12, UTM 310001 meters E, 5062085 meters N.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 35 to 40 degrees F., cryic temperature regime.
Soil moisture control section - between 4 and 12 inches; dry in some or all parts for 90 or more cumulative days in normal years; not dry in all parts for more than half of the cumulative days. Ustic moisture regime. Mollic epipedon thickness - 7 to 15 inches.
Depth to 2C horizon - 15 to 35 inches.
A horizon - Value: 4 or 5 dry; 2 or 3 moist
Chroma: 1, 2 or 3 Texture: loam or fine sandy loam Clay content: 10 to 18 percent
Rock fragments: 0 to 15 percent gravel
Reaction: pH 6.5 to 7.3
Bw horizon - Hue: 10YR or 2.5Y
Value: 5, 6 or 7 dry; 4 or 5 moist
Chroma: 3 or 4
Texture: fine sandy loam, very fine sandy loam, or loam
Clay content: 10 to 18 percent
Rock fragments: 0 to 30 percent--0 to 5 percent cobbles, 0 to 25 percent gravel
Reaction: pH 6.5 to 7.3
BC horizon Hue: 10YR or 2.5Y Value: 5, 6 or 7 dry; 4 or 5 moist Chroma: 3 or 4 Texture: fine sandy loam or sandy loam Clay content: 10 to 18 percent Rock fragments: 0 to 35 percent--0 to 5 percent cobbles, 0 to 30 percent gravel Reaction: pH 6.5 to 7.3
2C horizon - Hue: 10YR or 2.5Y
Value: 6 or 7 dry; 5 or 6 moist
Chroma: 2, 3, or 4
Texture: loamy sand, loamy coarse sand, sand, or coarse sand
Clay content: 0 to 10 percent
Rock Fragments: 35 to 75 percent--0 to 20 percent cobbles; 35 to 55 percent gravel
Reaction: pH 6.5 to 7.3
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform - Outwash plains and alluvial fans. Elevation - 5,900 to 6,500 feet.
Slope - 0 to 8 percent.
Parent material - Mixed alluvium.
Climate - long, cold winters; cool, moist springs; short, cool summers.
Mean annual precipitation - 14 to 19 inches.
Mean annual air temperature - 34 to 39 degrees F.
Frost-free period - 30 to 50 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bearmouth, Danielvil, and Philipsburg soils. The Bearmouth soils are sandy-skeletal. The Danielvil soils are coarse-loamy. The Philipsburg soils are fine-loamy and have a Bk horizon. These soils are on similar landform positions.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability above the 2C horizon and very rapid in the 2C horizon.
USE AND VEGETATION: Englejard soils are used as rangeland and wildlife habitat. Potential native vegetation includes Idaho fescue, and bluebunch wheatgrass, as well as other grasses, forbs and woody shrubs.
DISTRIBUTION AND EXTENT: Englejard soils are not extensive in the intermountain valleys of southwestern Montana.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Beaverhead County, Montana, Big Hole Valley Area, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from 0 to 9 inches (A horizon); a cambic horizon from 9 to 27 inches (Bw horizon); a lithologic discontinuity at 35 inches (2C horizon); a particle-size control section from 10 to 40 inches (Bw, BC, and part of the 2C horizons). Englejard soils have a cryic temperature regime and an ustic moisture regime.