LOCATION SHOEPEG IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Cumulic Haploxerolls
TYPICAL PEDON: Shoepeg loam--hayland; on a 1 percent smooth south aspect, 2,650 feet elevation. The profile was moist when described on April 15, 1981. (Colors are for air-dry soil unless otherwise stated.)
A1--0 to 10 inches; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine irregular pores; neutral (pH 7.0); clear smooth boundary. (8 to 12 inches thick)
A2--10 to 21 inches; similar to above horizon except moderate very fine granular structure; common very fine roots; neutral (pH 6.8); clear smooth boundary. (10 to 14 inches thick)
A3--21 to 29 inches; dark grayish brown (10YR 4/2) loam, very dark brown (10YR 2/2) moist; moderate very fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine irregular pores; neutral (pH 6.8); abrupt smooth boundary. (6 to 10 inches thick)
C1--29 to 48 inches; dark brown (10YR 3/3) silt loam, very dark brown (10YR 2/2) moist; many fine prominent strong brown (7.5YR 4/6) mottles; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; many very fine tubular pores; neutral (pH 6.8); abrupt smooth boundary. (16 to 20 inches thick)
2C2--48 to 60 inches; brown (10YR 5/3) gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; single grain; slightly hard, loose, nonsticky and nonplastic; many very fine irregular pores; neutral (pH 6.8).
TYPE LOCATION: Washington County, Idaho; 0.5 mile east of Cambridge, Idaho; approximately 1,150 feet north and 900 feet west of the southeast corner of sec. 2, T. 14 N., R. 3 W.
RANGE IN CHARACTERISTICS:
Depth to contrasting layer - 40 inches or more
Depth to water table - 24 to 36 inches
Depth to mottling - 20 to 36 inches
Thickness of mollic colors - 20 to 60 inches
Particle-size control section - 18 to 35 percent clay
Reaction of profile - neutral to mildly alkaline
A horizon
Value - 3 through 5 dry, 2 or 3 moist
Chroma - 1 or 2 dry or moist
C horizon
Hue - 10YR or 2.5Y
Value - 4 through 6 dry, 2 through 4 moist
Chroma - 2 or 3 dry and moist
Textures - L, SIL, or CL
Carbonates usually absent, maybe slight effervescent
2C horizon
Hue - 10YR or 2.5Y
Value - 5 or 6 dry, 3 or 4 moist
Chroma - 1 through 3 dry and moist
Textures - GR-SL, LCOS, or SL
COMPETING SERIES: These are Birdow, Blackrock, Coit, Dagor, Eastcan, Goose Creek, Goosenawt (T), Gosnita, Lakeview, Monroe, Soquel, and Willowdale series in the same family and Catherine, Dithod, Drax, Draper, Eastfork, Eld, and Vina series. Birdow soils are well drained and are effervescent to the surface. Blackrock soils are well drained and have 20 to 35 percent rock fragments in the control section. Catherine soils are in a fine silty family. Coit and Eastcan soils are calcareous throughout. Dagor soils are well drained. Dithod, Drax, and Eastfork soils are not in a cumulic family. Draper soils have an Ustic moisture regime. Eld soils are medium or slightly acid. Goosenawt soils lack mottles, are well drained and have buried A horizons. Gosinta, Monroe, and Goose Creek soils have an aridic moisture regime. Lakeview soils have B horizons, lack mottles, and have a 50 to 110 day growing season, and a 46 to 48 degree F average annual air temperature. Soquel soils have a mean annual soil temperature of 54 to 58 degrees F, lack a water table above 60 inches, and have a frost-free season of about 220 to 275 days. Average annual precipitation is 25 to 50 inches. Vina soils are well drained and lack a water table above 60 inches. Willowdale soils are well drained, have a 60 to 120 day frost-free season, and have 10 to 20 percent pumice in the control section.
GEOGRAPHIC SETTING: Shoepeg soils are on low terraces. Elevations range from 2,200 to 3,500 feet. Slopes are 0 to 3 percent. This soil formed in mixed alluvium. Mean annual precipitation is 14 to 18 inches including 4 to 6 feet of snow. The average annual air temperature is 50 to 54 degrees F. Frost-free period is about 130 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Appledellia, Dagor, Langrell, Midvale, Newell, Onyx, and the competing Catherine soils. Appledellia, Langrell, Midvale, and Newell soils have B horizons and are well drained. Onyx soils are in a coarse-silty family and are well drained.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow runoff; moderate permeability.
USE AND VEGETATION: Used mainly for irrigated hay, pasture and small grain. Vegetation, when under native conditions, is mainly bunch grasses, sedges, rushes, clovers, and other moisture loving plants.
DISTRIBUTION AND EXTENT: The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Washington County, Idaho, June 1992.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon (cumulic feature) - the zone from 0 to 60 inches
Depth to mottles - 29 inches