LOCATION DANUBE MNEstablished Series
TAXONOMIC CLASS: Coarse-silty over sandy or sandy-skeletal, mesic Typic Calciaquolls
TYPICAL PEDON: Danube silty clay, on a slightly convex slope of 1 percent, on a glacial outwash plain, in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Apk--0 to 9 inches; black (N 2/0) silty clay, dark gray (10YR 4/1) dry; moderate medium subangular blocky structure; friable; few fine roots; disseminated carbonates throughout; violently effervescent; slightly alkaline; clear smooth boundary.
Ak--9 to 19 inches; very dark gray (10YR 3/1) silty clay, gray (10YR 5/1) dry; weak fine subangular blocky structure parting to moderate fine granular; friable; few fine roots; disseminated carbonates throughout; violently effervescent; slightly alkaline; abrupt smooth boundary. (Combined thickness of A horizons is 10 to 24 inches.)
Bg--19 to 31 inches; grayish brown (2.5Y 5/2) silt loam; weak medium platy structure parting to weak fine subangular blocky; friable; many fine prominent yellowish brown (10YR 5/6) Fe concentrations; few fine roots; slightly effervescence; slightly alkaline; abrupt smooth boundary. (6 to 20 inches thick)
2BCg--31 to 35 inches; dark grayish brown (2.5Y 4/2) sandy loam; weak coarse subangular blocky structure; friable; few fine prominent yellowish brown (10YR 5/6) Fe concentrations; 4 percent gravel; slightly effervescent; slightly alkaline; clear smooth boundary. (0 to 5 inches thick)
2Cg--35 to 60 inches; dark grayish brown (2.5Y 4/2) loamy sand; single grain; loose; common fine prominent yellowish brown (10YR 5/6) Fe concentrations; 12 percent gravel; slightly effervescent; slightly alkaline.
TYPE LOCATION: Renville County, Minnesota; about 2 miles north of Renville; about 1,600 feet north and 2,150 feet west of the southeast corner of section 29, T. 116 N., R. 36 W.;USGS Renville quadrangle; lat. 44 degrees 49 minutes 22 seconds N. and long. 95 degrees 12 minutes 28 seconds W., NAD83.
RANGE IN CHARACTERISTICS: Depth to sand and gravel typically ranges from 20 to 40 inches. The mollic epipedon ranges from 10 to 24 inches thick. A calcic horizon is typically at the surface or within a depth of 16 inches. The upper mantle has 15 to 32 percent clay size carbonates and a calcium carbonate equivalent of 15 to 35 percent. The upper mantle typically does not have rock fragments. Rock fragment content in the lower material range from 0 to 35 percent. Reaction is slightly alkaline or moderately alkaline throughout.
The A, Ap, Apk or Ak horizon has hue of 10YR, 2.5Y or is neutral, value of 2 or 3, and chroma of 0 or 1. It is silty clay or silty clay loam.
Some pedons have an AB or ABk horizon.
The Bg horizon has hue of 2.5Y or 5Y, value of 4 to 6, and chroma of 1 to 3. It is silt loam or silty clay loam.
The 2BCg horizon has hue of 2.5Y or 5Y, value of 4 to 6, and chroma of 1 to 3. It is sandy loam, fine sandy loam, or loam.
The 2Cg horizon has hue of10YR, 2.5Y or 5Y, value of 4 to 6, and chroma of 1 to 4. It is loamy sand, sand, fine sand, loamy coarse sand, coarse sand, or their gravelly analogues.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: The Danube soils are on plane or slightly concave slopes with gradient of 0 to 2 percent on outwash plains and valley trains. They formed in a 20 to 40 inch thick mantle of alluvium or loess overlying sandy and gravelly outwash sediments that are Late Wisconsinan in age. Mean annual air temperature is about 45 to 48 degrees F. Mean annual precipitation is about 25 to 30 inches. Frost-free days range from 124 to 155. Elevation above sea level ranges from 900 to 1300 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Athelwold, Calco, Mayer, Millington, and Talcot series. The moderately well drained Athelwold soils are on higher lying terrain. The Calco and Millington soils are slightly lower on the landscape and do not have the sandy and gravelly underlying materials. The Mayer and Talcot soils are on similar landscape positions.
DRAINAGE AND PERMEABILITY: Poorly drained. Surface runoff is slow. Permeability is moderate and moderately slow in the upper part and rapid in the lower part. The apparent seasonal high water table is at a depth of .5 to 1.5 feet during November to June in normal years.
USE AND VEGETATION: Largely used to grow corn and soybeans. Native vegetation is a wet site plant community of the tall grass prairie.
DISTRIBUTION AND EXTENT: South-central Minnesota. This series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Renville County, Minnesota, 1994.
REMARKS: Diagnostic horizons and features recognized in the pedon: mollic epipedon and calcic horizon - zone from the surface to a depth of 19 inches (Apk and Ak horizons); cambic horizon - the zone from 19 to 35 inches (Bg & 2BCg horizons).
This soil has a coarse-silty over sandy or sandy skeletal particle size due to the presence of appreciable amounts of clay size carbonates in the upper mantle.
ADDITIONAL DATA: Refer to Minnesota Agricultural Experiment Station CFC No. 4273 for results of some laboratory analyses of the typical pedon. See MAES CFC No. 4182 and 4272 for analysis on other pedons. Soil Interpretation Record number MN0694.