LOCATION WODSKOW IDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Aquic Haplocalcids
TYPICAL PEDON: Wodskow sandy loam, cultivated. (Colors a re for dry soil unless otherwise noted.)
Ap--0 to 8 inches; grayish brown (10YR 5/2), brown (10YR 5/3 crushed) sandy loam, dark grayish brown (10YR 4/2) moist; very weak medium and fine subangular blocky structure that parts to very weak very fine granular; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine roots; many very fine interstitial and common very fine tubular pores; slightly effervescent; slightly alkaline (pH 7.6); abrupt smooth boundary. (6 to 10 inches thick)
A--8 to 12 inches; grayish brown (10YR 5/2) sandy loam, brown (10YR 5/3) crushed, dark grayish brown (10YR 4/2) moist; very weak, medium and fine, subandular blocky structure parting to very week fine granular; slightly hard, very friable, nonsticky and nonplastic; common very fine and fine roots; many very fine interstitial and common very fine tubular pores; abrupt smooth boundary. (3 to 6 inches thick)
Bk1--12 to 20 inches; light brownish gray (10YR 6/2) sandy loam, dark grayish brown (10YR 4/2) moist; few fine and medium distinct brown (10YR 5/3) redox concentrations, dark brown (7.5YR 3/2) moist; weak medium and fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common very fine roots; many very fine and few fine tubular pores; very slightly effervescent, few fine spots and veins of lime; slightly alkaline (pH 7.6); clear smooth boundary. (5 to 9 inches thick)
Bk2--20 to 28 inches; pale brown (10YR 6/3) sandy loam, dark brown (10YR 4/3) moist; few fine distinct brown (10YR 5/3) redox concentrations, dark brown (7.5YR 3/2) moist; very weak medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine interstitial and tubular pores; few worm channels; very slightly effervescent, few fine lime veins mainly in upper 2 inches; slightly alkaline (pH 7.8); clear smooth boundary. (5 to 8 inches thick)
2Bk3--28 to 34 inches; white (10YR 8/1) loam, brownish gray (10YR 6/2) moist; few fine distinct pale brown (10YR 6/3) redox concentrations, brown (10YR 5/3) and yellowish brown (10YR 4/4) moist; very weak medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine and few fine roots; many very fine tubular pores; few 0.5 to 0.8 inch krotovinas of soil material from horizon above; strongly effervescent, common fine veins and splotches of lime; moderately alkaline (pH 8.0); clear smooth boundary. (6 to 17 inches thick)
3Bk4--34 to 40 inches; light gray (10YR 7/1) sandy loam, grayish brown (10YR 5/2) moist; few fine and medium distinct grayish brown (10YR 5/2) and dark grayish brown (10YR 4/2) redox concentrations, dark grayish brown (10YR 4/2) and very dark grayish brown (10YR 3/2) moist; very weak medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; few very fine roots; common very fine tubular pores; 7 percent firm (cicada) krotovinas; strongly effervescent, very few fine veins and splotches of lime; moderately alkaline (pH 8.0); clear smooth boundary. (6 to 12 inches thick)
4BC--40 to 55 inches; light gray (10YR 7/2) loamy fine sand, grayish brown (10YR 5/2) moist; few fine and medium distinct redox concentrations, dark brown (7.5YR 3/2) moist; massive; soft, very friable, nonsticky and nonplastic; few roots; many very fine interstitial pores; discontinuous lenses of very weakly cemented sandy loam about 1/2 inch thick; slightly effervescent; moderately alkaline (pH 8.2); clear smooth boundary. (0 to 12 inches thick)
5C--55 to 60 inches; coarse sand; single grained; loose.
TYPE LOCATION: Minidoka County, Idaho; about 1/2 mile south of Rupert, Idaho; 390 feet east and 511 feet north of the southwest corner SE1/4 NE1/4 section 32, T.9S., R.24E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F. Depth to the calcic horizon is 9 to 15 inches. Depth to the sandy 4BC horizon is over 40 inches. Depth to bedrock is over 60 inches. A water table is at 30 to 40 inches for one month or more from June to August.
The Ap or A horizon has value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 or 3. It is noneffervescent to slightly effervescent. It has 0 to 5 percent calcium carbonate. It is slightly or moderately alkaline.
The Bk horzion has value of 5 or 6 dry, 3 to 5 moist and chroma of 2 or 3. It is sandy loam, loam or silt loam with 10 to 16 percent clay. it has 5 to 15 percent calcium carbonate. It is slightly or moderately alkaline.
The 2Bk and 3Bk horizon has value of 7 or 8 dry, 5 or 6 moist and chroma of 1 moist and 2 dry. It is sandy loam, loam, or silt loam with 10 to 18 percent clay. It has 5 to 15 percent calcium carbonate. It is moderately alkaline and strongly effervescent.
The 4BC and 5C horizon is sand, loamy sand or loamy fine sand with 0 to 5 percent clay. It has 0 to 5 percent calcium carbonate and is noneffervescent to slightly effervescent.
COMPETING SERIES: These are the Crib, Lind and Yonic series. All of these soils have over 15 calcium carbonate in the calcic horizon.
GEOGRAPHIC SETTING: Wodskow soils are on low terraces with slopes ranging from 0 to 2 percent. Elevations range from 3,000 to 4,600 feet. The soils formed in stratified alluvium from mixed rock sources (high in quartz) and probably eolian material in the upper part. The climate is semiarid and has relatively dry summr. The mean annual precipitation is about 8 to 11 inches. The frost-free period is 100 to 140 days. The mean annual air temperature is 45 to 50 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Arloval, Decker, and Schodson soils. Arloval soils are sandy. Decker soils are fine-loamy. Schodson soils lack a calcic horizon.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; moderately rapid permeability. A fluctuating summer water table is at depths of 30 to 40 inches from June to August. Water table is induced from irrigation.
USE AND VEGETATION: Used mainly for cropland under irrigation. Major crops are alfalfa, pasture, barley, oats, wheat, beans, and sugar beets.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
DISTRIBUTION AND EXTENT: South central Idaho. The series is moderately extensive.
SERIES ESTABLISHED: Minidoka County, Idaho, 1973.
REMARKS: Diagnoztic horizons and other features:
Ochric epipedon
Calcic horizon - 12 to 40 inches
Aquic subgroup - redox concentrations from 12 to 55 inches