LOCATION DUNNVILLE WIEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Typic Hapludolls
TYPICAL PEDON: Dunnville loam - on a plane 1 percent slope in a cultivated field at an elevation of about 925 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; very dark brown (7.5YR 2/2) loam, dark grayish brown (10YR 4/2) dry; weak medium subangular blocky structure parting to moderate medium granular; friable; common roots; strongly acid; abrupt smooth boundary. (8 to 10 inches thick)
A--8 to 12 inches; dark brown (7.5YR 3/2) loam, brown (7.5YR 5/2) dry; weak medium subangular blocky structure; friable; common roots; strongly acid; clear wavy boundary. (0 to 5 inches thick)
Bw1--12 to 15 inches; dark reddish brown (5YR 3/3) loam, pinkish gray (7.5YR 6/2) dry; moderate medium subangular blocky structure; friable; common roots; strongly acid; clear wavy boundary.
Bw2--15 to 20 inches; reddish brown (5YR 4/3) loam; moderate medium subangular blocky structure; friable; common roots; strongly acid; clear wavy boundary.
Bw3--20 to 24 inches; reddish brown (5YR 4/3) sandy loam; weak medium subangular blocky structure; friable; very dark brown (7.5YR 2/2) organic coatings on vertical faces of peds; common roots; strongly acid; clear wavy boundary. (Combined thickness of the Bw horizons ranges from 7 to 25 inches.)
2BC--24 to 30 inches; brown (7.5YR 4/4) sand; single grain; loose; few roots; very strongly acid; clear smooth boundary. (0 to 10 inches thick)
2C2--30 to 60 inches; strong brown (7.5YR 5/6) sand; single grain; loose; strongly acid.
TYPE LOCATION: Wood County, Wisconsin; about 2 miles south of Nekoosa; 600 feet north and 2200 feet west of the southeast corner of sec. 21, T. 21 N., R. 5 E. USGS Nekoosa, Wis. Quad. Latitude 44 degrees 16 minutes 48 seconds N. Longitude 89 degrees 54 minutes 45 seconds W. NAD 27.
RANGE IN CHARACTERISTICS: Thickness of the loamy alluvium, depth to the base of the cambic horizon, and depth to sandy alluvium all range from 20 to 40 inches. The particle-size control section averages from 7 and 17 percent clay and from 45 and 65 percent fine sand or coarser. Volume of gravel ranges from 0 to 5 percent in the loamy alluvium and from 0 to 35 percent in the sandy alluvium. Reaction typically ranges from very strongly acid to moderately acid in the loamy alluvium, but ranges to neutral in the upper part, where the soil is limed. Reaction ranges from very strongly acid to slightly acid in the sandy alluvium. Carbonates are absent to 80 inches or more.
The Ap or A horizon has hue of 5YR, 7.5YR, or 10YR; value of 2 or 3; and chroma of 1 to 3. Texture is loam, very fine sandy loam, fine sandy loam, or sandy loam. Thickness of the mollic epipedon ranges from 8 to 15 inches.
The Bw horizon has hue of 2.5YR, 5YR, or 7.5YR; value of 3 or 4; and chroma of 3 to 6. Texture is loam, very fine sandy loam, fine sandy loam, or sandy loam.
The 2BC horizon has hue of 5YR, 7.5YR, or 10YR; value of 4 to 6; and chroma of 4 to 8. Texture is loamy sand loamy fine sand, loamy coarse sand, sand, fine sand, coarse sand or the gravelly analogs.
The 2C horizon has color like the 2BC horizon above. Texture is sand, coarse sand, fine sand, or the gravelly analogs. A few thin strata of finer texture are in the 2C horizon in some pedons.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils are on low stream terraces. Slopes range from 0 to 12 percent. These soils formed mostly in loamy alluvium underlain by sandy alluvium. Mean annual precipitation ranges from 28 to 33 inches. Mean annual air temperature ranges from 39 to 45 degrees F. The frost free period ranges from about 120 to 135 days. Elevation ranges from 700 to 1200 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Friendship, Fordum, Mahtomedi, Menahga, and Sturgeon soils. The moderately well drained Friendship soils and the excessively drained Mahtomedi and Menahga soils are nearby on adjacent higher lying terraces. The poorly drained and very poorly drained Fordum soils and the somewhat poorly drained Sturgeon soils are nearby on adjacent lower lying flood plains.
DRAINAGE AND PERMEABILITY: Well drained. The potential for surface runoff ranges from negligible to medium. Permeability is moderate or moderately rapid in the loamy alluvium and rapid or very rapid in the sandy alluvium. These soils are subject to rare flooding of brief or very brief duration.
USE AND VEGETATION: Most areas are used for cropland. Common crops are corn, small grain, and hay. Native vegetation is prairie grasses with a few scattered oak trees.
DISTRIBUTION AND EXTENT: Central and west central Wisconsin. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Trempealeau County, Wisconsin, 1969.
REMARKS: This series is redefined as well drained only. A new series is needed for the 3040 acres correlated as moderately well drained phase in Marathon County. New series will also be needed for the mesic versions of these soils mapped in MLRA 105. Also, lab data is needed on these soils to see if the base saturation is high enough to support their classification as Mollisols.
Diagnostic horizons and features recognized in this pedon are:
mollic epipedon - 0 to 12 inches (Ap, A);
cambic horizon - 12 to 24 inches (Bw1, Bw2, Bw3).