LOCATION ENOCHVILLE IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive Cumulic Cryaquolls
TYPICAL PEDON: Enochville silt loam - on rangeland. (Colors are for dry soil unless otherwise noted.)
Ag1--0 to 7 inches; dark gray (10YR 4/1) silt loam, black (10YR 2/1) moist; few medium distinct brown (10YR 5/3) mottles; strong medium and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and medium roots; many very fine interstitial pores; slightly acid (pH 6.5); gradual smooth boundary. (5 to 10 inches thick)
Ag2--7 to 13 inches; dark gray (10YR 4/1) light silty clay loam, black (10YR 2/1) moist; few fine faint brown (10YR 5/3) mottles; moderate medium and coarse granular structure; very hard, friable, sticky and plastic; common fine and medium roots; many very fine and few fine and medium tubular pores; neutral (pH 6.6); gradual smooth boundary. (5 to 10 inches thick)
Bg1--13 to 25 inches; dark grayish brown (10YR 4/2) silty clay loam, very dark brown (10YR 2/2) moist; weak medium and fine subangular blocky structure parting to weak medium and coarse granular; very hard, firm, sticky and plastic; common fine and medium roots; many very fine and fine, few medium and coarse tubular pores; neutral (pH 6.7); gradual smooth boundary. (10 to 15 inches thick)
Bg2--25 to 41 inches; dark grayish brown (10YR 4/2) (grayish brown 10YR 5/2 crushed) silty clay loam, very dark grayish brown (10YR 3/2) moist; common medium faint brown (10YR 5/3) and few fine distinct very dark gray (10YR 3/1) mottles; weak medium subangular blocky structure parting to weak medium and coarse granular; very hard, firm, sticky and plastic; few fine and medium roots; many very fine, few fine and medium tubular pores; neutral (pH 6.9); gradual smooth boundary. (10 to 20 inches thick)
Bg3--41 to 53 inches; grayish brown (2.5Y 5/2) (light brownish gray 10YR 6/2 crushed) light silty clay loam, dark grayish brown (2.5Y 4/2) moist; many medium distinct yellowish brown (10YR 5/4) mottles; weak medium and fine subangular blocky structure; very hard, firm, sticky and plastic; few fine and medium roots; many very fine and fine, few medium and coarse tubular pores; neutral (pH 7.0); gradual smooth boundary. (0 to 15 inches thick)
2Cg--53 to 60 inches; yellowish brown (10YR 5/4) gravelly sandy clay loam, dark brown (10YR 4/3) moist; many medium distinct strong brown (7.5YR 5/6) and few fine grayish brown (10YR 5/2) and light gray (2.5Y 7/2) mottles; massive; hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many very fine and fine tubular pores; neutral (pH 7.0).
TYPE LOCATION: Bingham County, Idaho; about 10 miles southeast of Bone; 1,900 feet east and 220 feet south of the northwest corner of section 9, T. 3 S., R. 40 E.
RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 20 to 45 inches
Particle-size control section - 20 to 35 percent clay
Average annual soil temperature - 35 to 43 degrees F.
Ag horizon
Hue - 10YR or 2.5Y
Value - 3 through 5 dry, 1 or 2 moist
Chroma - 0 through 2 dry or moist
Mottles - none to few
Reaction - slightly acid to neutral
Peat or muck layers - upper 1 to 3 inches in some pedons
Bg horizon
Hue - 10YR through 5Y
Value - 3 through 6 dry, 1 or 2 moist
Chroma - 0 through 2 dry or moist
Mottles - common or many
Reaction - neutral to moderately alkaline
COMPETING SERIES: There are no other series in this family. Similar series are the Conda and Furniss series. Conda soils are fine-loamy and moderately deep to tufa deposits. Furniss soils are fine-loamy and have mollic epipedons less than 20 inches thick.
GEOGRAPHIC SETTING: Enochville soils are on bottomlands and low stream terraces. Slopes range from 0 to 4 percent. They formed in mixed alluvium from loess and other sources, including basalt and sedimentary rocks. The average annual precipitation ranges from 13 to 25 inches, and the average annual temperature ranges from 34 to 42 degrees F. The frost-free season is about 50 to 70 days. Elevation ranges from 5,800 to 7,500 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Foxcreek, Lanark, Robin, and Outlet soils and the competing Furniss soils. Foxcreek soils have contrasting textures in the particle-size control section and have mollic epipedons less than 20 inches thick. Lanark and Robin soils are well drained and have argillic horizons. Outlet soils have calcareous subsoils and have mollic epipedons less than 20 inches thick. Foxcreek and Furniss soils are on floodplains and formed in coarser textured alluvium. Outlet soils are on slightly higher areas with better drainage. Lanark and Robin soils are on loess covered fan terraces and foothills.
DRAINAGE AND PERMEABILITY: Poorly drained; slow runoff; moderately slow permeability. This soil may flood frequently for brief periods.
USE AND VEGETATION: Used as rangeland. The potential natural vegetation includes Kentucky bluegrass, basin wildrye, shrubby cinquefoil, silver sagebrush, and sedges.
DISTRIBUTION AND EXTENT: Moderately extensive in southeastern Idaho.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Bingham County, Idaho, 1972.