LOCATION OVERSHUE SDEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Endoaquolls
TYPICAL PEDON: Overshue fine sandy loam - on a concave slope of less than 1 percent in rangeland. When described the soil was moist throughout. (Colors are for moist soil unless otherwise stated)
A1--0 to 2 inches; black (10YR 2/1) fine sandy loam, dark gray (10YR 4/1) dry; few fine prominent strong brown (7.5YR 5/6) redox concentrations; weak fine granular structure; soft, very friable; many very fine and fine roots throughout; few very fine tubular pores; neutral; abrupt smooth boundary.
A2--2 to 7 inches; black (10YR 2/1) fine sandy loam, dark gray (10YR 4/1) dry; few fine prominent brown (7.5YR 4/4) redox concentrations; weak medium subangular blocky structure parting to weak fine granular; soft, very friable; common very fine and fine roots throughout; few very fine tubular pores; neutral; clear wavy boundary. (Combined A horizons 5 to 15 inches thick)
Bw1--7 to 22 inches; very dark grayish brown (10YR 3/2) fine sandy loam, grayish brown (10YR 5/2) dry; common fine prominent brown (7.5YR 4/4) redox concentrations; moderate medium prismatic structure parting to moderate medium subangular blocky; soft, very friable; common very fine and fine roots throughout; few very fine tubular pores; few fine and medium masses of iron-manganese; neutral; clear wavy boundary.
Bw2--22 to 32 inches; olive brown (2.5Y 4/3) fine sandy loam, light olive brown (2.5Y 5/3) dry; common fine prominent brown (7.5YR 4/4) redox concentrations; moderate medium prismatic structure parting to weak medium subangular blocky; soft, very friable; few very fine and fine roots throughout; few very fine tubular pores; common fine and medium masses of iron-manganese; neutral; gradual wavy boundary.
Bw3--32 to 42 inches; light olive brown (2.5Y 5/4) sandy loam, light yellowish brown (2.5Y 6/4) dry; common fine prominent strong brown (7.5YR 4/6) redox concentrations and few fine prominent light brownish gray (10YR 6/2) redox depletions; weak medium prismatic structure parting to weak medium subangular blocky; soft, very friable; few very fine roots throughout; few very fine tubular pores; many fine and medium masses of iron-manganese; neutral; clear smooth boundary. (Combined Bw horizons 20 to 45 inches thick)
2Bkg--42 to 57 inches; grayish brown (2.5Y 5/2) clay loam, light gray (2.5Y 7/2) dry; common fine prominent yellowish brown (10YR 5/6) redox concentrations and few fine distinct gray (2.5Y 6/1) redox depletions; weak medium prismatic structure parting to weak medium subangular blocky; very hard, firm, slightly sticky and slightly plastic; few very fine roots throughout; few very fine tubular pores; common fine and medium masses of carbonate and common fine masses of iron-manganese; strongly effervescent; 2 percent gravel; moderately alkaline; clear smooth boundary. (0 to 20 inches thick)
2Cg--57 to 80 inches; olive brown (2.5Y 4/3) clay loam, light yellowish brown (2.5Y 6/3) dry; many fine and medium prominent dark yellowish brown (10YR 4/6) redox concentrations and many fine and medium prominent gray (10YR 6/1) redox depletions; massive; very hard, firm, slightly sticky and slightly plastic; few very fine tubular pores; few fine and medium masses of iron-manganese; slightly effervescent; 4 percent gravel; slightly alkaline.
TYPE LOCATION: Spink County, South Dakota; about 5 miles south and 1 mile east of Tulare; 1,450 feet east and 480 feet south of the northwest corner Sec. 25, T. 114 N.- R. 64 W.; USGS Topographical Quadrangle - HITCHCOCK, S. DAK.; Latitude: 44 degrees, 39 minutes, 42 seconds N.; Longitude: 98 degrees, 28 minutes, 42 seconds W.
RANGE IN CHARACTERISTICS: Depth to till ranges from 40 to 60 inches. Thickness of the mollic epipedon is typically 10 to 24 inches, but ranges from 10 to 30 inches and extends into the Bw horizon in most pedons. Depth to carbonates typically correspond to the depth to the till.
The A horizon has hue of 10YR, value of 2 or 3 and 3 to 5 dry, and chroma of 1 or 2. It typically is fine sandy loam, but is very fine sandy loam, sandy loam, or loam. It has few to common faint to prominent redox features. It is neutral or slightly alkaline.
The Bw horizon has hue of 10YR or 2.5Y, value of 2 to 5 and 4 to 6 dry, and chroma of 1 to 4. It is typically fine sandy loam, very fine sandy loam, or sandy loam, but some pedons have a thin loamy sand or loamy fine sand layer in the lower part of the Bw horizon. It has few to many, faint to prominent redox features. It is neutral or slightly alkaline. Some pedons have a thin C horizon above the till that is typically loamy fine sand or loamy sand.
The 2Bkg horizon has hue or 2.5Y or 5Y, value of 4 or 5 and 5 to 7 dry and chroma of 2 to 4. It is clay loam or loam. Redox features range from common to many and faint to prominent. It has common or many, fine to coarse accumulations of carbonates. It is slightly to strongly alkaline.
The 2C horizon has hue of 2.5Y or 5Y, value of 4 or 5 and 5 to 7 dry and chroma of 2 to 4. It is loam or clay loam. Few fine or medium accumulations of carbonates are present in some pedons. Redox features range from common to many and faint to prominent. It is slightly to strongly alkaline.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Overshue soils are in shallow depressions or upland swales. Slopes ranges from 0 to 1 percent. The soils formed in loamy glaciofuvial sediments overlying till. The mean annual air temperature ranges from 45 to 48 degrees F, and the mean annual precipitation ranges from 18 to 21 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Carthage, Elsmere, Ethan, Forestburg, Hand and Toko soils. The moderately well drained Carthage and Forestburg and well drained Ethan and Hand soils are on nearby upland positions. In addition, Ethan and Hand soils are fine-loamy and the Forestburg soils are sandy over loamy. The somewhat poorly drained Elsmere soils are on nearby swales and are sandy. The poorly drained Toko soils are in deeper and commonly larger depressions and are fine-loamy.
DRAINAGE AND PERMEABILITY: Poorly drained. Surface runoff is ponded. Permeability is moderately rapid in the solum and moderately slow in the underlying till. A seasonal perched water table is at a depth of 1 foot above the surface to 1.5 feet below the surface at some time during the period of April to June in most years.
USE AND VEGETATION: Mostly cropped, however excess moisture prevents cultivation some years. Corn is the most common crop. Native vegetation is mainly prairie cordgrass and sedges.
DISTRIBUTION AND EXTENT: East central South Dakota. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Spink County, South Dakota, 1997.
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface of the soil to a depth of about 22 inches (A1, A2, and Bw1 horizons); cambic horizon - the zone from about 22 to 42 inches (Bw2 and Bw3 horizons).
ADDITIONAL DATA; Laboratory characterization (NSSL) - S96SD115020