LOCATION DOBIE WIEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Haplic Glossudalfs
TYPICAL PEDON: Dobie silt loam - on a convex 3 percent slope in an improved pasture at an elevation of about 1150 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; dark brown (10YR 3/3) silt loam, light brownish gray (10YR 6/2) dry; moderate medium and fine granular structure; friable; common fine and medium roots; slightly acid; abrupt smooth boundary. (6 to 10 inches thick)
B/E--8 to 16 inches; about 80 percent dark yellowish brown (10YR 4/4) silt loam (Bt); moderate medium subangular blocky structure; friable; common faint dark brown (10YR 3/3) clay films on faces of peds; penetrated by tongues of brown (10YR 5/3) silt loam (E), very pale brown (10YR 7/3) dry; moderate medium platy structure; friable; few fine roots; slightly acid; clear smooth boundary. (The glossic horizon ranges from 2 to 20 inches thick.)
Bt1--16 to 26 inches; dark yellowish brown (10YR 4/4) silt loam; moderate medium subangular blocky structure; friable; few fine roots; many distinct dark brown (7.5YR 3/4) clay films on faces of peds; about 3 percent sandstone channers; moderately acid; clear smooth boundary. (5 to 20 inches thick)
2Bt2--26 to 31 inches; olive brown (2.5Y 4/4) loam; moderate medium subangular blocky structure; friable; few fine roots; few prominent dark brown (7.5YR 3/4) clay films on faces of peds; about 3 percent sandstone channers; slightly acid; clear smooth boundary.
2Bt3--31 to 37 inches; olive (5Y 4/4) very fine sandy loam; moderate medium subangular blocky structure; very friable; few distinct dark brown (7.5YR 3/4) clay films on faces of peds; about 3 percent sandstone channers; slightly acid; clear wavy boundary. (Combined thickness of the 2Bt horizons ranges from 0 to 14 inches)
2Cr1--37 to 42 inches; strong brown (7.5YR 5/6) glauconitic sandstone and siltstone; clear wavy boundary.
2Cr2--42 to 50 inches; strata of brown (7.5YR 4/4) and grayish green (5G 4/2) glauconitic sandstone; clear wavy boundary.
2Cr3--50 to 60 inches; grayish green (5G 4/2) glauconitic sandstone.
TYPE LOCATION: Barron County, Wisconsin; about 1 mile north and 1 mile east of Prairie Farm; 2440 feet south and 1440 feet west of the northeast corner of sec. 15, T. 32 N., R. 13 W.
RANGE IN CHARACTERISTICS: Thickness of the solum, thickness of the loess mantle, and depth to the paralithic contact all range from 20 to 40 inches. Weighted average clay content of the particle-size control section ranges from 18 to 27 percent and weighted average content of sand coarser than very fine is less than 15 percent. Volume of sandstone channers ranges from 0 to 5 percent in the loess mantle and from 0 to 35 percent in the residuum. Reaction typically ranges from strongly acid to slightly acid in the solum and substratum but ranges to neutral in the Ap and E horizons, where the soil is limed.
The Ap horizon has value of 3 or 4 and chroma of 2 to 4. Uncultivated pedons have A horizons 1 to 4 inches thick with hue of 10YR, value of 2 or 3, and chroma of 1 to 3.
Some pedons have an E horizon with hue of 10YR, value of 4 to 6, and chroma of 2 or 3. Colors of 4/3 or 5/3 have value dry of 7 or more.
Dobie soils have a glossic horizon (E/B or B/E horizons, or both). The E part has color and texture like the E horizon described above. The Bt part has hue of 7.5YR or 10YR, value of 3 to 5, and chroma of 4 to 6.
The Bt horizon has color and texture like the Bt horizon described above.
The 2Bt horizon has hue of 7.5YR, 10YR, 2.5Y, 5Y, 5GY or 5G; value of 3 to 6; and chroma of 2 to 6 . It is loam, very fine sandy loam, fine sandy loam, sandy loam or the channery analogs.
The 2Cr horizon has color like the 2Bt horizon described above.
COMPETING SERIES: These are the Campia, Otterholt, and Wickware(T) series. Similar soils are the Gale and LaFarge series. Campia, Otterholt, and Wickware soils do not have a paralithic contact within a depth of 40 inches. Gale and LaFarge soils are mesic.
GEOGRAPHIC SETTING: Dobie soils are on summits, shoulders, and back slopes of hills on bedrock controlled uplands. Slope gradients range from 2 to 20 percent. Dobie soils formed in loess and in loamy residuum from the underlying fine grained glauconitic sandstone. Mean annual precipitation ranges from 28 to 33 inches. Mean annual temperature ranges from 39 to 45 degrees F. The frost free period ranges from about 120 to 135 days. Elevation ranges from 800 to 1950 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Doritty, Hayriver, and Wickware. The moderately well drained Doritty soils are in lower landscape positions than those of Dobie soils on foot slopes where the loess is more than 60 inches thick. The well drained Hayriver soils are in landscape positions similar to those of Dobie soils where the loess mantle is absent and the solum is formed entirely in residuum. The well drained Wickware soils are in lower landscape positions on back slopes and foot slopes where the loess is more than 60 inches thick.
DRAINAGE AND PERMEABILITY: Well drained. Surface runoff is medium to rapid. Permeability is moderate in the subsoil and ranges from slow to moderate in the sandstone.
USE AND VEGETATION: Most areas are used for cropland. Corn, small grain, and hay are the major crops. Native vegetation is mixed hardwoods, mainly sugar maple, northern red oak, and American basswood.
DISTRIBUTION AND EXTENT: Northwestern Wisconsin. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Barron County, Wisconsin, 1993.
REMARKS: Diagnostic horizons and features recognized in the pedon are: ochric epipedon - 0 to 8 inches (Ap); glossic horizon - 8 to 17 inches (B/E); argillic horizon - 8 to 37 inches (B/E, Bt1, 2Bt2, and 2Bt3); paralithic contact - 37 inches (2Cr1).
ADDITIONAL DATA: Soil Interpretation Record - WI0484.