LOCATION ANCHUSTEQUI IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Aquic Torriorthents
TYPICAL PEDON: Anchustequi loam on a 3 percent smooth west facing slope at an elevation of 3,030 feet in cropland. When described on August 31, 1988, the soil was moist below 11 inches. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 7 inches; pale brown (10YR 6/3) loam, dark brown (10YR 4/3) moist; moderate fine subangular blocky structure parting to weak fine granular; slightly hard, very friable, slightly sticky, slightly plastic; many very fine and few fine roots; common very fine and few fine tubular pores; slight effervescence; strongly alkaline (pH 8.9); abrupt wavy boundary. (3 to 9 inches thick)
AC--7 to 11 inches; very pale brown (10YR 7/3) loam, dark brown (10YR 4/3) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; common very fine and fine roots; common very fine irregular and few very fine tubular pores; slight effervescence; very strongly alkaline (pH 9.3); abrupt smooth boundary. (2 to 6 inches thick)
C1--11 to 16 inches; white (10YR 8/2) silt loam, yellowish brown (10YR 5/4) moist; massive; hard, friable, slightly sticky, slightly plastic; few very fine roots; common very fine tubular pores; strong effervescence; very strongly alkaline (pH 9.5); abrupt smooth boundary. (4 to 12 inches thick)
C2--16 to 20 inches; white (10YR 8/2) silt loam, brown (10YR 5/3) moist; few fine distinct light yellowish brown (10YR 6/4) moist mottles; moderate thin platy structure parting to weak fine subangular blocky; soft, friable, slightly sticky, slightly plastic; few very fine roots; many very fine irregular pores; violent effervescence; very strongly alkaline (pH 10.4); abrupt wavy boundary. (3 to 10 inches thick)
C3--20 to 41 inches; light brownish gray (10YR 6/2) loamy very fine sand, dark brown (10YR 4/3) moist; common fine distinct light yellowish brown (10YR 6/4) moist mottles; massive; soft, very friable, slightly sticky, slightly plastic; few very fine roots, (common very fine roots near the lower boundary); many very fine irregular pores; strong effervescence; very strongly alkaline (pH 9.8); gradual wavy boundary. (12 to 22 inches thick)
C4--41 to 51 inches; light gray (10YR 7/2) silt loam, dark brown (10YR 4/3) moist; moderate thin platy structure; slightly hard, friable, slightly sticky, slightly plastic; common very fine roots; few very fine and fine tubular pores; strong effervescence; very strongly alkaline (pH 9.5); abrupt smooth boundary. (7 to 18 inches thick)
C5--51 to 60 inches; pale brown (10YR 6/3) loamy very fine sand and very fine sandy loam, dark brown (10YR 4/3) moist; massive; soft, very friable; many very fine and fine pores; strong effervescence; very strongly alkaline (pH 9.8).
TYPE LOCATION: Gooding County, Idaho; about 0.5 miles east of Hagerman; 450 feet west, 100 feet north of the southeast corner of sec. 14, T. 7 S., R. 13 E.
RANGE IN CHARACTERISTICS
Average annual soil temperature - 52 to 54 degrees F.
Depth to water table - 1 to 3 feet from January to July
Reaction - strongly alkaline or very strongly alkaline
Clay content (control section average) - 5 to 18 percent
Ap horizon
Value - 5 or 6 dry
Chroma - 2 through 4 dry or moist
AC horizon
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 2 or 3 dry, 3 or 4 moist
Texture - L, SICL
Clay content - 20 to 33 percent
C horizon
Value - 5 through 8 dry, 3 through 5 moist
Chroma - 2 or 4 dry, 3 or 6 moist
Texture - stratified SICL to FS
Mottles - distinct or prominent color
Hue - 7.5YR or 10YR
Value - 4 or 5 dry, 3 through 6 moist
Chroma - 3 through 6 dry, 4 through 6 moist
COMPETING SERIES: There are no other soils recognized in this family. Soils in a closely related family are the Ixian and Needle Peak series. Ixian and Needle Peak soils have a fine-silty particle-size control section.
GEOGRAPHIC SETTING: Anchustequi soils occur on lacustrine terraces. Slopes range from 1 to 12 percent. Elevation ranges from 2,700 to 3,100 feet. The soil formed in lacustrine sediments from mixed sources. The average annual precipitation ranges from 7 to 9 inches, most of which falls as snow and early spring rain. The average annual air temperature is 50 to 52 degrees F. The frost free season is 120 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ephrata, Fathom (T), Kecko, Kudlac (T), Paulville, Quincy and Starbuck series. Ephrata soils have sand and gravel in the control section and are well drained. Fathom and Quincy soils are somewhat excessively drained. Kecko and Kudlac soils are well drained. Paulville soils have an argillic horizon and are well drained. Starbuck soils are shallow to bedrock and are well drained.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow runoff and moderate permeability.
USE AND VEGETATION: Used mainly for homesite development and irrigated cropland.
DISTRIBUTION AND EXTENT: Anchustequi soils are inextensive in south central Idaho.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Gooding County, Idaho, 1993.
REMARKS: Diagnostic horizons and features recognized in the pedon are:
Ochric epipedon - zone from 0 to 11 inches (Ap and AC horizons)