LOCATION MANN WIEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Epiaquolls
TYPICAL PEDON: Mann silt loam - on a 1 percent slope in a brome grass meadow at an elevation of about 1,210 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; black (10YR 2/1) silt loam, dark gray (10YR 4/1) dry; weak fine subangular blocky structure; friable; very fine subangular blocky structure; friable; many fine fibrous roots; neutral; clear smooth boundary.
A--8 to 13 inches; very dark gray (5Y 3/1) silty clay loam; moderate fine and medium angular blocky structure; firm; few fine fibrous roots; few fine prominent yellowish brown (10YR 5/8) and dark greenish gray (5BG 4/1) masses of iron accumulation in the matrix; slightly alkaline; clear wavy boundary. (Combined thickness of the Ap and A horizons range from 10 to 18 inches.)
Bg1--13 to 20 inches; dark gray (5Y 4/1) silty clay loam; moderate fine and medium angular blocky structure; firm; few fine fibrous roots; common fine prominent yellowish brown (10YR 5/8) and common fine faint dark greenish gray (5Gy 4/1) masses of iron accumulation in the matrix; slightly alkaline; clear wavy boundary.
Bg2--20 to 28 inches; gray (5Y 5/1) silty clay loam; weak medium subangular blocky structure; firm; few fine fibrous roots; many medium prominent strong brown (7.5YR 5/6) and strong brown (7.5YR 5/8) masses of iron accumulation in the matrix; slightly alkaline; clear wavy boundary. (Combined thickness of the Bg horizons ranges from 10 to 18 inches.)
2BCg--28 to 34 inches; mixed gray (5Y 5/1) and brown (7.5YR 4/2) loam; weak medium subangular blocky structure; firm; common medium prominent olive (5Y 5/6) masses of iron accumulation in the matrix; about 10 percent fine gravel; slightly alkaline; clear wavy boundary. (4 to 14 inches thick)
2C--34 to 60 inches; brown (7.5YR 5/4) sandy loam; massive; friable; few fine distinct strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; about 10 percent fine gravel; slightly alkaline.
TYPE LOCATION: Wood County, Wisconsin; about 1 mile southeast of Marshfield; this site is on the University of Wisconsin Marshfield Branch Experiment Station; 500 feet south and 1400 feet west of the northeast corner of sec. 22, T. 25 N., R. 3 E. USGS Marshfield, Wis. Quad. Latitude 44 degrees 38 minutes 18 seconds N. Longitude 90 degrees 7 minutes 32 seconds W. NAD 27.
RANGE IN CHARACTERISTICS: Depth to the base of soil development ranges from 24 to 50 inches. Thickness of the silty mantle ranges from 20 to 36 inches. Rock fragments typically are absent in the silty mantle. Volume of gravel ranges from 0 to 10 percent in the till. Volume of cobbles or stones range from 0 to 10 percent in the till. Reaction ranges from slightly acid to slightly alkaline throughout the soil. Carbonates are absent to a depth of 60 inches or more. Redox accumulations are in the lower part of the mollic epipedon and saturation occurs within a depth of 1 foot for some time in most years.
The A horizon has hue of 10YR, 2.5Y, or 5Y; value of 2 or 3; and chroma of 0 to 2. Texture is silt loam. Some uncultivated pedons have an organic surface layer up to 7 inches thick.
The Bg horizon has hue of 10YR, 2.5Y, or 5Y; value of 4 to 6; and chroma of 1 or 2. Texture is silty clay loam or silt loam.
Some pedons have a 2Bg horizon with hue of 7.5YR, 10YR, 2.5Y, or 5Y, value of 4 to 6, and chroma of 1 or 2. Texture is loam, clay loam, or sandy clay loam.
The 2BCg horizon has color like the 2Bg horizon. Texture is loam, sandy clay loam, clay loam, or sandy loam.
Some pedons have a 2BC horizon with color and texture like the 2Bg above except that chroma is 3 or 4.
The 2C or 2Cg horizon has hue of 7.5YR, 10YR, or 2.5Y; value of 4 to 6; and chroma of 2 to 4. Texture is loam, sandy loam, clay loam, or sandy clay loam.
COMPETING SERIES: There are no competing series
GEOGRAPHIC SETTING: These soils are in shallow depressions and drainageways of ground moraines. In some places, they are on flats and adjacent to depressions. Slopes range from 0 to 2 percent. These soils formed in a mantle of loess or silty alluvium and in the underlying loamy till of early Wisconsinan Age. Mean annual precipitation ranges from about 28 to 32 inches. Mean annual air temperature ranges from about 40 to 45 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Loyal,
Marshfield, and
Withee soils. The moderately well drained Loyal and somewhat poorly drained Withee soils form a drainage sequence with the Mann soils. Marshfield soils are on similar landscape positions but do not have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Very poorly drained. The potential for surface runoff ranges from negligible to low. Permeability is moderate in the silty mantle and moderately slow in the till. This soil has a perched seasonal high water table from 1 foot above to 1 foot below the surface for much of the time from September to June in most years.
USE AND VEGETATION: Most areas remain in native vegetation which is mostly grasses and sedges with some shrubs, such as alder and willow and some patches of deciduous trees such as American elm and white ash. Some areas are used for pastureland and a few areas have been drained and are used for cropland. Common crops are corn, small grains, and hay.
DISTRIBUTION AND EXTENT: Central Wisconsin. Mann soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Wood County, Wisconsin, 1971.
REMARKS: The silty mantle may have some loess influence, but since these soils are in depressions and drainageways, some sorting of or addition of sand by water is probable. These soils were formerly included with the Adolph series.
Diagnostic horizons and features recognized in this pedon are: mollic epipedon - 0 to 13 inches (Ap, A); cambic horizon - 13 to 34 inches (Bg1, Bg2, 2BCg); aquic suborder prominent redox accumulations in the lower part of the mollic epipedon.