LOCATION MARSHFIELD WIEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Mollic Epiaqualfs
TYPICAL PEDON: Marshfield silt loam - on a plane, east facing 1 percent slope in a former cultivated field now in marsh grass at an elevation of about 1325 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 9 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; weak fine granular structure; very friable; common very fine and fine roots; moderately acid; abrupt smooth boundary. (6 to 9 inches thick)
Eg--9 to 14 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; moderate very fine subangular blocky structure; very friable; common very fine and fine roots; common medium distinct dark yellowish brown (10YR 4/6) masses of iron accumulation; strongly acid; gradual irregular boundary. (2 to 15 inches thick)
Btg1--14 to 30 inches; dark grayish brown (10YR 4/2) silt loam; moderate fine and medium subangular blocky structure; friable; few very fine and fine roots; few faint very dark grayish brown (10YR 3/2) clay films on faces of peds; common medium distinct yellowish brown (10YR 5/6) and many coarse prominent strong brown (7.5YR 5/6) masses of iron accumulation; about 3 percent gravel; strongly acid; clear wavy boundary. (4 to 20 inches thick)
2Btg2--30 to 36 inches; grayish brown (10YR 5/2) loam; moderate medium subangular blocky structure; firm; common faint dark grayish brown (10YR 4/2) clay films on vertical faces of peds; many coarse prominent strong brown (7.5YR 5/8) and common medium distinct yellowish brown (10YR 5/6) masses of iron accumulation; about 10 percent gravel; strongly acid; clear wavy boundary. (7 to 13 inches thick)
2C--36 to 60 inches; brown (7.5YR 5/4) loam; massive; firm; few fine distinct very pale brown (10YR 7/3) iron depletions and many coarse distinct strong brown (7.5YR 5/8) masses of iron accumulation; about 10 percent gravel; neutral.
TYPE LOCATION: Clark County, Wisconsin; about 3 miles south and 0.5 miles west of Colby; 1,100 feet north and 150 feet west of the southeast corner of sec. 35, T. 28 N., R. 1 E.
RANGE IN CHARACTERISTICS: Thickness of the solum ranges from 30 to 50 inches. Thickness of loess or silty alluvium ranges from 12 to 36 inches. The particle-size control section averages between 18 and 35 percent clay and between 15 and 35 percent fine sand or coarser. Volume of rock fragments averages less than 35 percent in the particle-size control section. Volume of gravel ranges from 0 to 10 percent in the silty mantle and from 3 to 35 percent in the till. Volume of cobbles ranges from 0 to 5 percent in the silty mantle and from 0 to 10 percent in the till. Reaction typically ranges from extremely acid to moderately acid in the upper part of the solum, but ranges to neutral in the Ap horizon, where the soil is limed. Reaction ranges from very strongly acid to neutral in the lower part of the subsoil and in the substratum. Redox features typically are throughout the profile. Redox depletions with chroma of 2 or less are 50 percent or more of the matrix in at least the upper 5 inches of the argillic horizon. Saturation occurs at or near the surface much of the year.
The Ap or A horizon has value of 2 or 3, and chroma of 1 to 3. Value dry is 5 or less
The Eg horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 1 or 2. It is silt loam or silt.
The Btg horizon has hue of 10YR, 2.5Y, or 5Y; value of 4 to 6; and chroma of 1 or 2. It is silt loam or silty clay loam.
The 2Btg horizon has hue of 5YR, 7.5YR, 10YR, 2.5Y, or 5Y; value of 4 to 6; and chroma of 1 or 2. It is sandy loam, loam, sandy clay loam, clay loam, or the gravelly analogs.
The 2Cg or 2C horizon has hue of 5YR, 7.5YR, 10YR, 2.5Y, or 5Y; value of 4 to 6; and chroma of 1 to 4. It is sandy loam, fine sandy loam, loam, sandy clay loam, clay loam, or the gravelly analogs.
COMPETING SERIES: There are no competing series. Related soils are the Adolph, Auburndale, Capitola and Mann series. Adolph and Mann soils have a mollic epipedon and do not have an argillic horizon. Auburndale soils are fine-silty. Capitola soils are coarse-loamy.
GEOGRAPHIC SETTING: These soils are in depressions and in drainageways of ground moraines. Slope gradients range from 0 to 2 percent. These soils formed in loess or silty alluvium 12 to 36 inches thick and in the underlying loamy glacial till. Mean annual precipitation ranges from 28 to 33 inches. Mean annual temperature ranges from 38 to 42 degrees F. The frost free period ranges from about 90 to 130 days. Elevation ranges from 800 to 1950 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Loyal, Withee, and Mann series. The moderately well drained Loyal and the somewhat poorly drained Withee soils form a drainage sequence with the Marshfield soils. Poorly drained Mann soils are on similar landscape positions.
DRAINAGE AND PERMEABILITY: Poorly drained. Surface runoff is very slow or ponded. Permeability is moderate in the silty mantle and moderately slow in the till. These soils have a perched seasonal high water table from one foot above to 1 foot below the surface much of the time during the period September to June in most years.
USE AND VEGETATION: Most areas of this soil are in woodland. Native vegetation is mostly water-tolerant hardwoods with some conifers. Common trees are black ash, red maple, quaking aspen, and white pine. Some areas are used for pastureland. Where drained, some areas are used for cropland. Common crops are corn, small grain and hay.
DISTRIBUTION AND EXTENT: North-central Wisconsin. This soil is of large extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Wood County, Wisconsin, 1971.
REMARKS: Diagnostic horizons and features recognized in this pedon are: ochric epipedon: 0 to 14 inches (Ap, Eg) albic horizon - 9 to 14 inches (Eg); argillic horizon - 14 to 36 inches (Btg1, 2Bgt2); aquic feature - redox features in all layers between the bottom of the Ap and 16 inches and dominant chroma of 2 or less in the upper 5 inches of the argillic horizon and aquic conditions within 20 inches much of the time in most years.
ADDITIONAL DATA: Soil Interpretation Record: WI0254.