LOCATION REE SD+NEEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Argiustolls
TYPICAL PEDON: Ree loam - on a plane slope of 2 percent in a cultivated field. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 6 inches; dark gray (10YR 4/1) crushing to dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; moderate medium granular structure; soft, friable; neutral; abrupt smooth boundary. (4 to 12 inches thick)
Bt1--6 to 13 inches; dark gray (10YR 4/1) crushing to dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; shiny film on faces of peds; neutral; clear smooth boundary.
Bt2--13 to 18 inches; grayish brown (2.5Y 5/2) clay loam, very dark grayish brown (2.5Y 3/2) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; hard, firm, slightly sticky and slightly plastic; shiny film on faces of peds; slightly alkaline; clear smooth boundary. (Combined thickness of the Bt horizons is 8 to 22 inches.)
Btk--18 to 25 inches; light brownish gray (2.5Y 6/2) clay loam, dark grayish brown (2.5Y 4/2) moist; weak coarse prismatic structure parting to weak coarse subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few fine accumulations of carbonate; slight effervescence; moderately alkaline; clear smooth boundary. (0 to 10 inches thick)
Bk--25 to 46 inches; light brownish gray (2.5Y 6/2) clay loam, grayish brown (2.5Y 5/2) moist; weak coarse subangular structure; slightly hard, friable, slightly sticky and slightly plastic; common fine soft accumulations of carbonate; strong effervescence; moderately alkaline; clear smooth boundary. (10 to 24 inches thick)
C--46 to 60 inches; light brownish gray (2.5Y 6/2) loam, grayish brown (2.5Y 5/2) moist; massive; soft, friable; strong effervescence; moderately alkaline.
TYPE LOCATION: Sully County, South Dakota; about 8 miles south and 10 miles east of Onida; 420 feet east and 1440 feet north of the southwest corner of sec. 20, T. 113 N., R. 75 W.
RANGE IN CHARACTERISTICS: The depth to carbonates ranges from 12 to 34 inches and typically is about 18 to 24 inches. The thickness of the mollic epipedon ranges from 7 to 20 inches.
The A horizon has hue of 10YR, value of 3 to 5 and 2 or 3 moist, and chroma of 1 or 2. It commonly is loam but is silt loam or fine sandy loam in some pedons. It is slightly acid or neutral.
The Bt horizon has hue of 10YR or 2.5Y, value of 4 to 6 and 2 to 4 moist, and chroma of 1 to 4. It commonly is clay loam but is sandy clay loam or silty clay loam in some pedons. It has an average clay content of 27 to 35 percent. It ranges from slightly acid to slightly alkaline in the upper part and slightly or moderately alkaline in the lower part. Some pedons do not have carbonates as disseminated lime or few fine accumulations of carbonate in the lower part.
The Bk horizon has hue of 10YR or 2.5Y, value of 5 to 7 and 4 to 6 moist, and chroma of 2 to 4. It is loam, clay loam, fine sandy loam, sandy loam, or sandy clay loam. It has common to many accumulations of carbonates. It is slightly or moderately alkaline.
The C horizon has hue of 10YR or 2.5Y, value of 5 to 7 and 4 to 6 moist, and chroma of 2 to 4. It ranges from sandy loam to clay loam, but some pedons have sandy materials, sand and gravel or clay materials at a depth of 40 to 60 inches. It is slightly or moderately alkaline.
COMPETING SERIES: These are the Glenham, Gosper, Hennings, Houdek, Reventon, Verdigre, Wewela and Wineg series in the this family. Glenham and Houdek soils formed in glacial till. Gosper soils typically contain less clay in the argillic horizon and become more sandy with increasing depth. Hennings soils have sandstone at a depth of 40 to 60 inches. Reventon soils are drier in the soil moisture control section in May and June. Verdigre soils do not have Bk horizons and have a paralithic contact of shale bedrock at a depth of 40 to 60 inches. Wewela soils have shale bedrock within a depth of 40 inches. Wineg soils have a drier climate.
GEOGRAPHIC SETTING: Ree soils are on terraces and uplands. Slopes are plane to slightly convex and range from 0 to 15 percent. Ree soils formed mainly in loamy alluvial sediments. The mean annual temperature ranges from 45 to 50 degrees F, and the mean annual precipitation ranges from 15 to 24 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Canning, Durrstein, Keya, Kirley, Mosher, Oahe, and Onita soils. Canning, Kirley, and Oahe soils are in the same landscape. Canning soils have sand and gravel at a depth of 20 to 40 inches. Kirley soils have a fine textured argillic horizon. Oahe soils have more than 35 percent gravel within a depth of 40 inches. Keya and Onita soils are in swales. Keya soils have a mollic epipedon more than 20 inches thick. Onita soils have a fine textured argillic horizon. Durrstein and Mosher soils have a natric horizon and are on similar landscapes.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is low on nearly level areas to medium or high on the strongly sloping areas. Permeability is moderate.
USE AND VEGETATION: Many areas are cultivated. Corn, sorghum, small grain, and alfalfa are the main crops. Some areas remain in native grass. The native vegetation includes western wheatgrass, green needlegrass, needleandthread, sideoats grama, blue grama, big bluestem, little bluestem, porcupine grass, sedges and forbs.
DISTRIBUTION AND EXTENT: Central and south-central South Dakota and north-central Nebraska. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Hughes County, South Dakota, 1970.
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 18 inches (Ap, Bt1, and Bt2 horizons); argillic horizon - the zone from about 6 to 25 inches (Bt1, Bt2, and Btk horizons).