LOCATION WAGONJACKET             ID

Established Series
Rev. DA/HBM
12/2019

WAGONJACKET SERIES

The Wagonjacket series consists of soils that are somewhat poorly drained and very deep, that formed in alluvium from volcanic ash and welded tuff. They are on flood plains. Permeability is moderate. Slopes range from 0 to 1 percent. The average annual precipitation is about 15 inches380 mm, and the average annual temperature is about 6.1 degrees C.

TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Cumulic Haploxerolls

TYPICAL PEDON: Wagonjacket silt loam, on a slope of 0 percent under native vegetation at 1,740 meters elevation. When described on September 11, 1985 the soil profile was moist to 8 cm, dry from 8 to 94 cm, and moist below. (Colors are for dry soil unless otherwise noted)

A1--0 to 8 cm; dark gray (10YR 4/1) silt loam, black (10YR 2/1) moist; strong medium granular structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common very fine and fine tubular pores; neutral (pH 6.6); clear smooth boundary. (5 to 13 cm thick)

A2--8 to 28 cm; gray (10YR 5/1) silt loam, very dark gray (10YR 3/1) moist; strong medium granular structure; hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common very fine and fine tubular pores; neutral (pH 6.6); gradual wavy boundary. (10 to 25 cm thick)

BA--28 to 66 cm; grayish brown (10YR 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; hard, firm, slightly sticky, and slightly plastic; common fine and medium roots; common very fine and fine tubular pores; neutral (pH 6.6); gradual wavy boundary. (25 to 43 cm thick)

Bg1--66 to 94 cm; light brownish gray (10YR 6/2) silt loam, dark gray (10YR 4/1) moist; few fine distinct dark yellowish brown (10YR 4/6) moist mottles; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common fine and medium roots; common very fine and fine tubular pores; neutral (pH 6.6); clear smooth boundary. (20 to 30 cm thick)

Bg2--94 to 117 cm; light brownish gray (10YR 6/2) silt loam, dark gray (10YR 4/1) moist; common medium distinct yellowish brown (10YR 4/6) moist mottles; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common fine and medium roots; common very fine and fine tubular pores; neutral (pH 6.6); abrupt smooth boundary. (15 to 25 cm thick)

2Bg3--117 to 155 cm; light gray (10YR 7/2) gravelly sandy loam, grayish brown (10YR 5/2) moist; many coarse distinct yellowish brown (10YR 4/6) moist; mottles; massive; slightly hard, friable; few very fine roots; common very fine and fine tubular pores; 25 percent gravel; neutral (pH 6.6); abrupt smooth boundary. (25 to 41 cm thick)

3C--155 to 178 cm; multi-colored layers of sand and gravel; single grain; loose, nonsticky and nonplastic; many coarse distinct yellow (10YR 7/8) moist mottles; neutral (pH 6.6).

TYPE LOCATION: About 10 miles southeast of Rogerson, Idaho; about 1,000 feet south and 1,000 feet west of the northeast corner of section 23 T. 15 S., R. 17 E.; USGS Big Creek Ranch 7.5-minute topographic quadrangle; latitude 42 degrees 6 minutes 40.7 seconds N and longitude 114 degrees 25 minutes 19 seconds W; WGS84 Decimal Degrees 42.1113056 latitude, - 114.4219444 longitude.

RANGE IN CHARACTERISTICS:

Depth to bedrock - More than 150 cm.
Depth to mottles - 36 to 66 cm.
Particle size control section - 15 to 18 percent clay Thickness of the Mollic epipedon - 50 to 75 cm.
Average annual soil temperature - 6.7 to 7.2 degrees C.
Depth to water table - 46 to 75 cm.
Soil Moisture: This soil is usually moist but is dry for 45 to 70 consecutive days during the late summer and autumn. Typic xeric moisture regime.

A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 1 or 2 dry or moist

Bg1 and Bg2 horizons
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 1 or 2 dry or moist

COMPETING SERIES: This is the Joevar series. Joevar soils have a Bk horizon.

GEOGRAPHIC SETTING: Wagonjacket soils are on floodplains. The slope ranges from 0 to 1 percent. The soils formed in alluvium from volcanic ash and welded tuff. Elevations are 1,710 to 1,865 meters. The average annual precipitation ranges from 360 to 410 mm, and the average annual temperature is 5.6 to 7.2 degrees C. The frost free season is 90 to 105 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aninto, Oshone, and Tucker soils. Aninto soils are clayey skeletal. Oshone soils are fine textured and moderately deep to a duripan. Aninto and Oshone soils occur on higher terraces. Tucker soils occur in the same landform, but they are fine textured.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained, slow runoff; moderate saturated hydraulic conductivity.

USE AND VEGETATION: Wagonjacket soils are used for rangeland. Native vegetation is sedge, slender wheatgrass, basin wildrye, willow, and lodgepole pine.

DISTRIBUTION AND EXTENT: Wagonjacket soils are of small extent in south central Idaho. MLRA 25.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California

SERIES PROPOSED: Twin Falls County, Idaho, 1987. The name is coined.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 66 cm (The A1, A2and BA horizons).

Particle size control section - the zone from 25 to 100 cm (The BA and Bg1 horizons and parts of the A2 and Bg2 horizons).

The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.

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National Cooperative Soil Survey
U.S.A.