LOCATION FEZIP IDEstablished Series
TAXONOMIC CLASS: Sandy, mixed Cumulic Cryaquolls
TYPICAL PEDON: Fezip fine sandy loam--on a 1 percent northwest-facing slope at 6,800 feet elevation with willow and grass vegetation. (Colors are for dry soil unless otherwise noted. When described on July 17, 1985, the soil was dry to 4 inches and moist below that depth. The water table was at 20 inches on this date.)
Ag--0 to 2 inches; dark grayish brown (2.5Y 4/2) fine sandy loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine and fine irregular pores; slightly acid (pH 6.2); clear wavy boundary. (1 to 6 inches thick)
Bg--2 to 6 inches; dark grayish brown (2.5Y 4/2) fine sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine and fine irregular pores; slightly acid (pH 6.2); clear wavy boundary. (3 to 6 inches thick)
Cg--6 to 16 inches; dark grayish brown (2.5Y 4/2) loamy sand, very dark grayish brown (2.5Y 3/2) moist; few fine faint reddish brown (5YR 4/4) redox concentrations; massive; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots; many very fine and fine irregular pores; slightly acid (pH 6.2); abrupt wavy boundary. (6 to 12 inches thick)
Agb--16 to 26 inches; grayish brown (2.5Y 5/2) fine sandy loam, very dark grayish brown (2.5Y 3/2) moist; common fine distinct reddish brown (5YR 4/4) redox concentrations; massive; hard, friable, nonsticky and nonplastic; few fine and medium roots; many very fine and fine irregular pores and few fine tubular pores; lenses of organic matter 1 to 2 cm thick; slightly acid (pH 6.4); abrupt wavy boundary. (7 to 15 inches thick)
2C1--26 to 31 inches; multicolored extremely gravelly loamy coarse sand; single grain; loose; few fine roots; many very fine and fine irregular pores; 60 percent gravel, 5 percent cobbles; slightly acid (pH 6.4); clear wavy boundary. (0 to 7 inches thick)
2C2--31 to 60 inches; multicolored extremely gravelly coarse sand; single grain; loose; many fine irregular pores; 50 percent gravel, 20 percent cobbles, 5 percent stones; slightly acid (pH 6.4).
TYPE LOCATION: Custer County, Idaho; about 1 mile east of the Pettit Lake Road, Idaho Highway 93 junction; about 1,800 feet south and 600 feet east from the northwest corner of section 34, T. 8 N., R. 14 E.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 35 to 39 degrees F.
Average summer soil temperature - 44 to 49 degrees F.
Depth to high water table - 6 to 18 inches May through August
Mollic epipedon thickness - 20 to 30 inches
Depth to strongly contrasting textures - 25 to 30 inches
Ag horizon
Hue - 2.5Y or 10YR
Value - 3 through 5 dry, 2 or 3 moist
Chroma - 1 or 2 moist
Bg and Cg horizon
Hue - 2.5Y or 10YR
Value - 4 or 5 dry
Texture - FSL, LS, GR-SL, LFS
Rock fragments - 0 to 20 percent
Reaction - neutral to slightly acid
Agb horizon
Value - 3 or 4 moist
Reaction - neutral to slightly acid
2C horizon
Texture - GRX-COS, GRX-LCOS, GRX-LS
Rock fragments - 65 to 90 percent
Reaction - neutral to slightly acid
Some pedons have an AC horizon
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Fezip soils are on flood plains. These soils formed in alluvium over flood deposited sand and gravel. Slopes are 0 to 4 percent and elevations are 4,800 to 7,400 feet. The climate is cold and moist in winter and spring and cool in summer. Average annual precipitation is 10 to 18 inches. Average annual temperature is 34 to 38 degrees F. The frost-free period is 5 to 30 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Busterback, Copperbasin, Lilylake, Redfish, and Wiggleton soils. Busterback soils are on outwash and stream terraces, are pachic and have loamy-skeletal particle-size control sections. Copperbasin soils are on floodplains, are somewhat poorly drained and have sandy-skeletal particle-size control sections. Lilylake soils are on floodplains and have histic epipedons and sandy-skeletal particle-size control sections. Redfish soils are on floodplains and have sandy-skeletal particle-size control sections. Wiggleton soils are on fan terraces, outwash fans and stream terraces. Wiggleton soils have mollic epipedons that are 10 to 16 inches thick and have sandy-skeletal particle-size control sections.
DRAINAGE AND PERMEABILITY: Poorly drained. Slow runoff. Moderately rapid permeability over very rapid. These soils are frequently flooded from April through June for brief periods of about 3 to 5 days.
USE AND VEGETATION: Pasture. The natural vegetation is willows and sedges.
DISTRIBUTION AND EXTENT: Central Idaho. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Custer County, Idaho, 1999.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 26 inches (the Ag, Bg, Cg, and Agb horizons).
Particle-size control section - The zone from 10 to 40 inches (part of the Cg, the Agb, the 1C1, and part of the 2C2 horizon).