LOCATION OLDENBURG          IN

OLDENBURG SERIES

The Oldenburg series consists of very deep, moderately well drained soils on flood plains. They formed in loamy alluvium. Slopes range from 0 to 2 percent. Mean annual temperature is about 10.5 degrees C (51 degrees F), and mean annual precipitation is about 39 inches.

TAXONOMIC CLASS: Coarse-loamy, mixed, active, mesic Fluvaquentic Eutrudepts

TYPICAL PEDON: Oldenburg silt loam on a 1 percent slope in a cultivated field at en elevation of about 277 meters (910 feet) above MSL. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 23 cm (0 to 9 inches); brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; moderate medium granular structure; friable; many fine roots; neutral; abrupt smooth boundary. (18 to 28 cm or 7 to 11 inches thick)

Bw1--23 to 43 cm (9 to 17 inches); brown (10YR 4/3) loam, weak fine subangular blocky structure; friable; many fine roots; common distinct dark brown (10YR 3/3) organic coatings on faces of peds; neutral; clear wavy boundary.

Bw2--43 to 64 cm (17 to 25 inches); brown (10YR 4/3) loam; weak fine subangular blocky structure; friable; common fine roots; common brown (10YR 4/3) organic coatings on faces of peds; common fine faint grayish brown (10YR 5/2) iron depletions in the matrix; neutral; clear wavy boundary.

Bw3--64 to 99 cm (25 to 39 inches); brown (10YR 5/3) fine sandy loam; weak fine subangular structure; friable; common fine roots; few brown (10YR 4/3) organic coatings on faces of peds; common fine faint grayish brown (10YR 5/2) iron depletions in the matrix; neutral; gradual wavy boundary. (Combined thickness of the Bw horizons is 38 to 84 cm or15 to 33 inches.)

C1--99 to 117 cm (39 to 46 inches); brown (10YR 5/3) fine sandy loam; massive; friable; few fine roots; few fine faint light brownish gray (10YR 6/2) and grayish brown (10YR 5/2) iron depletions in the matrix; neutral; clear wavy boundary. (13 to 25 cm or 5 to 10 inches thick)

C2--117 to 135 cm (46 to 53 inches); brown (10YR 5/3) loamy sand; massive; very friable; common fine faint grayish brown (10YR 5/2) iron depletions in the matrix; 1 percent gravel; neutral; clear wavy boundary. (5 to 25 cm or 2 to 10 inches thick)

C3--135 to 152 cm (53 to 60 inches); brown (10YR 5/3) fine sandy loam; massive; friable; common fine faint grayish brown (10YR 5/2) iron depletions in the matrix; 1 percent gravel; neutral.

TYPE LOCATION: Franklin County, Indiana; about 2 miles southwest of Oldenburg; 800 feet west and 1800 feet south of the northeast corner of sec. 13, T. 10 N., R. 11 E.; USGS Batesville, IN. topographic quadrangle; lat. 39 degrees 19 minutes 05 seconds N. and long. 085 degrees 14 minutes 33 seconds W., NAD 27; UTM Zone 16, 651508 easting and 4353551 northing, NAD 83.

RANGE IN CHARACTERISTICS:
Depth to the base of the cambic horizon: 56 to 112 cm (22 to 44 inches)
The particle-size control section averages between 8 and 18 percent clay, 35 to 70 percent sand, and 0 to 10 percent rock fragments (gravel).
Reaction is strongly acid to neutral in the control section, but at least one layer is above pH 5.0 by 0.01M CaCl2 method.

Ap or A horizon:
Value: 4 or 5
Chroma: 3
Texture: silt loam, loam or fine sandy loam
Reaction: strongly acid to neutral
Rock fragment content: 0 to 10 percent gravel

Bw horizon:
Value: 4 to 6
Chroma: 3 or 4
Texture: silt loam, loam, fine sandy loam or sandy loam, and includes 1 to 3 inch strata of loamy sand or loamy fine sand
Reaction: strongly acid to neutral
Rock fragment content: 0 to 10 percent gravel

C or Cg horizon:
Value: 4 to 6
Chroma: 1 to 4
Texture: fine sandy loam, sandy loam or loam and includes strata of sandy clay loam, loamy sand, loamy fine sand, and includes gravelly analogues of all these textures.
Clay content: 6 to 27 percent
Sand content: 40 to 70 percent
Reaction: moderately acid to neutral
Rock fragment content: 0 to 34 percent gravel and 0 to 5 percent cobbles

COMPETING SERIES: The Waterford series is the only competing series. Waterford soils have more than 70 percent sand and have carbonates in the lower part of the substratum.

GEOGRAPHIC SETTING: The Oldenburg soils are on flood plains along streams in dissected till plains mainly from the Illinioian stage. Slopes range from 0 to 2 percent. They formed in loamy alluvium. Mean annual temperature ranges from 10.5 to 14 degrees C (51 to 57 degrees F). Mean annual precipitation ranges from 1016 to 1143 mm (40 to 45 inches). Frost free period ranges from 160 to 190 days. Elevation ranges from 122 to 280 meters (400 to 920 feet) above mean sea level

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Holton and Wirt soils on flood plains and the Bonnell, Cincinnati, Hickory, and Nabb soils on adjacent dissected till plains. The somewhat poorly drained Holton soils are in channels and lower lying flood-plain steps. The well drained Wirt soils are on natural levees adjacent to stream channels and on higher lying flood-plain steps. The well drained Bonnell and Hickory soils are on shoulders and backslopes. The well drained Cincinnati and moderately well drained Nabb soils are dominantly on summits and shoulders.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/s) in the subsoil and moderately high or high (4.23 to 42.34 micrometers/s) in the underlying material. Permeability is moderate in the subsoil and moderate or moderately rapid in the underlying material. The potential for surface water runoff is negligible or very low. Depth to an intermittent seasonal high water table is 0.5 to .08 meters (1.5 to 2.5 feet) from December through April in most years. These soils are subject to occasional to frequent periods of flooding.

USE AND VEGETATION: Most areas of this soil are either used to grow corn and soybeans, or are used for hay and pasture. Some areas are in forest. Native vegetation is mixed deciduous forest, chiefly elm, ash, sycamore and maple.

DISTRIBUTION AND EXTENT: Southern Indiana. Acreage is of small extent, mainly in MLRA 114A and MLRA 114B.

MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana

SERIES ESTABLISHED: Franklin County, Indiana, 1984.

REMARKS: CEC activity class is estimated and tentatively placed in the active class, but may be in the superactive class. A sandy substratum phase is recognized in Owen County, Indiana.

Diagnostic horizons and features recognized in this pedon are: 1) ochric epipedon: zone from 0 to 23 cm (0 to 9 inches) (Ap horizon); 2) cambic horizon: the zone from 23 to 99 cm (9 to 39 inches) (Bw1,Bw2,Bw3 horizons); 3) Redoximorphic features: at 43 to 152 cm (17 to 60 inches).

ADDITIONAL DATA: Lab data available: National Soil Survey Lab at Lincoln, NE. - RP 84IN071.