LOCATION PAREHAT IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Fluvaquentic Haploxerolls
TYPICAL PEDON: Parehat silt loam - pasture. (Colors are for dry soil unless otherwise noted.)
A--0 to 9 inches; grayish brown (2.5Y 5/2) silt loam, very dark grayish brown (10YR 3/2) moist; upper 2 inches weak fine and medium platy structure parting to weak very fine granular, lower part weak very fine granular; slightly hard, very friable, slightly sticky and slightly plastic; common very fine roots; many very fine vesicular pores in the upper 2 inches and tubular pores in the upper 2 inches and tubular pores in the lower part; strongly effervescent; moderately alkaline (pH 8.2); gradual smooth boundary. (9 to 15 inches thick)
Bw--9 to 17 inches; light brownish gray (2.5Y 6/2) silt loam, very dark grayish brown (10YR 3/2) moist; weak coarse prismatic structure parting to weak very fine and medium granular; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; many very fine and fine tubular pores; very few hard (cicada) krotovinas; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary. (4 to 15 inches thick)
Ab1--17 to 27 inches; gray (N 6/) silt loam, very dark gray (N 3/) moist; weak medium subangular blocky structure parting to weak very fine, fine and medium granular; hard, friable, slightly sticky and slightly plastic; common fine roots; common very fine and few fine tubular pores; common hard (cicada) krotovinas; strongly effervescent, few streak and lime spots; moderately alkaline (pH 8.4); gradual wavy boundary. (0 to 12 inches thick)
Ab2--27 to 36 inches; gray (N 5/0) and gray (N 6/0) crushed, silt loam, very dark gray (N 3/) moist; few fine distinct yellowish brown (10YR 5/6) mottles; moderate very fine subangular blocky structure parting to weak medium granular; hard, friable, slightly sticky and slightly plastic; common fine and few medium roots; common very fine and few fine tubular pores; strongly effervescent; moderately alkaline (pH 8.4); gradual smooth boundary. (0 to 15 inches thick)
Bk1--36 to 42 inches; gray (N 6/0) and light gray (N 7/0) silt loam, dark gray (10YR 4/1) moist; few fine distinct dark grayish brown (10YR 4/2) mottles; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; common very fine and fine and few medium tubular pores; strongly effervescent, few fine veins, streaks and lime splotches; strongly alkaline (pH 8.5); clear wavy boundary. (0 to 15 inches thick)
Bk2--42 to 53 inches; light gray (2.5Y 7/2) silt loam, grayish brown (2.5Y 5/2) moist; massive; hard, friable, slightly sticky and slightly plastic; few fine roots; many very fine and common fine and medium tubular pores; violently effervescent, common streaks and lime splotches; strongly alkaline (pH 8.5); gradual smooth boundary. (0 to 12 inches thick)
C--53 to 60 inches; light gray (2.5Y 7/2) loam, dark grayish brown (2.5Y 4/2) moist; massive; hard, very friable, nonsticky and nonplastic; few fine roots; common very fine tubular pores; strongly effervescent; moderately alkaline (pH 8.4). (0 to 20 inches thick)
TYPE LOCATION: Power County, Idaho; SW 1/4 SE 1/4 section 20, T.7s., R.33E.
RANGE IN CHARACTERISTICS:
The soils are not saturated throughout, but are saturated within 40 inches of the surface for 90 to 120 days unless artificially drained. Buried A horizons are common and the organic matter content does not decrease regularly with increasing depth.
Mottles with chroma of 2 or less are at a depth of 20 to 30 inches.
Mollic epipedon thickness - 7 to 19 inches
Average annual soil temperature - 47 to 53 degrees F.
Average annual summer soil temperature - 64 to 70 degrees F.
Control section average - Percent clay: 18 to 27
A horizon
Hue - 10YR or 2.5Y
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 1 through 3 dry or moist
Effervescence - noneffervescent to strongly effervescent
Reaction - Slightly alkaline through strongly alkaline
Bk horizon
Hue - 2.5Y, N or 10YR
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 0 through 2 dry or moist
C horizon
Hue - 2.5Y, N or 10YR
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 0 through 2, dry or moist
Texture: Silt loam or loam
Some pedons are salt and alkaline affected
Some subhorizons are noncalcareous
COMPETING SERIES: This is the Kirkham series. Kirkham soils do not have a calcic horizon.
GEOGRAPHIC SETTING: Parehat soils are on level to very gently sloping bottomland, alluvial fans, or low terraces. They formed in alluvium from mixed sources influenced by loess. Slopes are 0 to 3 percent. Elevation is 2,200 to 4,800 feet. The mean annual precipitation is 8 to 15 inches. The mean annual temperature is 47 to 53 degrees F. Frost-free season is 100 to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Penoyer, Tickason and Baldock soils. Penoyer and Tickason soils lack mottles above a depth of 40 inches. Baldock and Penoyer soils lack a mollic epipedon.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; low surface runoff; moderate permeability (moderately high or high saturated hydraulic conductivity). A high water table is at 2 to 4 feet sometime during the months of May through September. Most areas may be flooded.
USE AND VEGETATION: Used for pasture, hayland and some irrigated potatoes and small grains.
DISTRIBUTION AND EXTENT: Southern Idaho. These soils are not extensive (about 8,300 acres). MLRAs 11 and 28A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Power County, Idaho, 1973.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from 0 to 9 inches (the A horizon).
Cambic horizon - The zone from 9 to 17 inches (the Bw horizon).
Calcic horizon - The zone from 36 to 53 inches (the Bk1 and Bk2 horizons).
Particle-size control section - The zone from 10 to 40 inches (part of the Bw horizon, the Ab1 and Ab2 horizons and part of the Bk1 horizon).