LOCATION SCOTTSBURG INEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, semiactive, mesic Aquic Hapludults
TYPICAL PEDON: Scottsburg silt loam on a 3 percent slope in a cultivated field at an elevation of about 175 meters (575 feet) above MSL. (Colors are for moist soil unless otherwise stated).
Ap--0 to 20 cm (0 to 8 inches); 80 percent brown (10YR 4/3) and 20 percent yellowish brown (10YR 5/6) silt loam, pale brown (10YR 6/3) and very pale brown (10YR 7/4) dry; weak medium subangular blocky structure parting to moderate medium granular; friable; common very fine roots; strongly acid; abrupt smooth boundary. (15 to 25 cm or 6 to 10 inches thick)
Bt1--20 to 48 cm (8 to 19 inches); yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure; friable; few fine roots; common distinct strong brown (7.5YR 4/6) clay films on faces of peds; common distinct brown (10YR 4/3) organic coatings in root channels and pores; strongly acid; gradual wavy boundary.
Bt2--48 to 69 cm (19 to 27 inches); yellowish brown (10YR 5/6) silty clay loam; moderate medium subangular blocky structure; friable; few very fine roots; common distinct dark yellowish brown (10YR 4/6) clay films on faces of peds; very strongly acid; clear wavy boundary.
Bt3--69 to 79 cm (27 to 31 inches); yellowish brown (10YR 5/6) silty clay loam; weak medium subangular blocky structure; friable; few very fine roots; common distinct dark yellowish brown (10YR 4/6) clay films on faces of peds; common fine distinct brown (10YR 5/3) iron depletions in the matrix; very strongly acid; clear wavy boundary. (Combined thickness of the Bt horizon is 36 to 71 cm or 14 to 28 inches.)
2Btx1--79 to 109 cm (31 to 43 inches); brown (10YR 5/3) silty clay loam; moderate coarse prismatic structure parting to moderate medium subangular blocky; firm; few very fine roots between peds; common distinct grayish brown (10YR 5/2) clay films on vertical faces of peds; common fine prominent strong brown (7.5YR 5/6) and common fine distinct yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; 4 percent gravel; 45 percent brittle; extremely acid; gradual wavy boundary
2Btx2--109 to 135 cm (43 to 53 inches); dark yellowish brown (10YR 4/6) silty clay loam; moderate coarse prismatic structure parting to moderate coarse subangular blocky; firm; many distinct gray (10YR 5/1) clay films on vertical faces of peds; common fine iron and manganese concretions; few fine prominent grayish brown (10YR 5/2) iron depletions in the matrix; 3 percent gravel; 45 percent brittle; extremely acid; clear wavy boundary. (Combined thickness of the 2Btx horizons is 33 to 66 cm or 13 to 26 inches.)
3BCg--135 to 155 cm (53 to 61 inches); grayish brown (10YR 5/2) parachannery silty clay; weak thin platy structure; firm; common medium prominent yellowish brown (10YR 5/6) and many medium prominent strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; 20 percent parachanners (shale); extremely acid; clear wavy boundary. (10 to 41 cm or 4 to 16 inches thick.)
3Cr--155 to 170 cm (61 to 67 inches); very dark grayish brown (10YR 3/2) and brown (7.5YR 4/4) weathered shale, with fractures 0.3 to 1 cm (1/8 to 1/2 inch) thick and 5 to 25 cm (2 to 10 inches) in length; extremely acid; clear wavy boundary. (10 to 61 cm or 4 to 24 inches thick.)
3R--170 cm (67 to 80 inches); very dark gray (5YR 3/1) very strongly cemented, fissile black shale.
TYPE LOCATION: Scott County, Indiana; 570 feet east and 570 feet north of the southwest corner of section 28, T. 4 N., R. 7 E. USGS Crothersville, Indiana topographic quadrangle; lat. 38 degrees 45 minutes 08 seconds N. and long. 085 degrees 45 minutes 22 seconds W., NAD 27; UTM Zone 16, 608089 easting and 4290021 northing, NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the base of the argillic horizon: 122 to 152 cm (48 to 60 inches)
Depth to a horizon with fragic soil properties: 61 to 91 cm (24 to 36 inches)
Depth to bedrock (paralithic contact): 152 to 203 cm (60 to 72 inches)
Depth to bedrock (lithic contact): 163 to 203 cm (64 to 80 inches)
The particle-size control section: averages 24 to 30 percent clay and 8 to 15 percent sand
Gravel in the Btx horizon has mixed lithology.
Ap horizon:
Hue: of 10YR
Value: 4 or 5
Chroma: 3 to 6
Texture: silt loam
Clay content: 12 to 24 percent
Sand content: 8 to 20 percent
Reaction: very strongly acid to neutral
A horizon, where present:
Hue: of 10YR
Value: 4
Chroma: 3 or 4
Texture: silt loam
Clay content: 12 to 20 percent
Sand content: 8 to 20 percent
Reaction: very strongly acid or very strongly acid
Bt horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 4 to 6
Tezture: silt loam or silty clay loam
Clay content: 24 to 30 percent
Sand content: 8 to 15 percent
Reaction: very strongly acid or strongly acid, and the upper part ranges to slightly acid in limed areas
2Btx horizon:
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 3 to 8 with redox depletions
Texture: silt loam or silty clay loam
Clay content: 24 and 34 percent
Sand content: 12 to 18 percent
Percent brittleness: 30 to 60 percent
Reaction: extremely acid or very strongly acid
3BC or 3BCg horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 2 to 8
Texture: parachannery silty clay loam or parachannery silty clay
Parachanners content: 15 to 34 percent
Clay content: 35 and 55 percent
Sand content: 2 to 8 percent
Reaction: extremely acid or very strongly acid
3Cr or 3C horizon:
Hue: 7.5YR or 10YR
Value: 2 to 4
Chroma: 1 to 4
COMPETING SERIES: These are the Berea, Hibler, Leipsic, and Liverpool (T) soils. Berea soils have a lithic contact within a depth of 102 cm (40 inches). Hibler, Leipsic, and Liverpool (T) soils do not have a lithic contact in the series control section.
GEOGRAPHIC SETTING: Scottsburg soils are on strath terraces within dissected till plains. They are on treads. Slopes range from 0 to 6 percent. The soils formed in 51 to 102 cm (20 to 40 inches) of loess, loamy slope alluvium, and the underlying residuum from black shale. The shale is from the New Albany Formation, Devonian System. Mean annual temperature ranges from11 to 14 degrees C (51 to 57 degrees F), and the mean annual precipitation ranges from 1016 to 1143 mm (40 to 45 inches).
GEOGRAPHICALLY ASSOCIATED SOILS: These are the moderately well drained Blocher, Deputy, and Jennings soils, the well drained Cincinnati and Trappist soils, and the somewhat poorly drained Whitcomb soils. Blocher and Deputy soils do not have a horizon with fragic soil properties in the series control section. Cincinnati and Jennings soils have a fragipan in the series control section. Blocher, Cincinnati, and Jennings soils are on higher lying back slopes and shoulders of till plains. Deputy soils are on similar landform positions as the Scottsburg soils. The moderately deep Trappist soils are on risers of strath terraces. Whitcomb soils are on treads of strath terraces.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/s) above the horizon with fragic soil properties and low to moderately high (0.07 to 1.41 micrometers/s) in and below this horizon. Permeability is moderate above the horizon with fragic soil properties and slow or very slow in and below this horizon. The potential for surface water runoff is low or medium. Depth to a intermittent perched seasonal high water table is at a depth of 0.5 to 1 meter (1.5 to 3 feet) from December through April in most years.
USE AND VEGETATION: Most areas are being used to grow cultivated crops, mainly corn and soybeans. A few areas are used for growing small grain, mainly wheat. A few areas are used hay or pasture, or are in woodland. Native vegetation is mixed hardwood forest.
DISTRIBUTION AND EXTENT: Southeastern Indiana. The acreage is of small extent in MLRA 114A.
MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Scott County, Indiana, 1995.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 20 cm or 0 to 8 inches (Ap horizon)
Argillic horizon: 20 to 135 cm or 8 to 53 inches (Bt1, Bt2, Bt3, 2Btx1, 2Btx2 horizons)
Redoximorphic features: 79 to 155 cm or 31 to 61 inches
Fragic soil properties: 79 to 135 cm or 31 to 53 inches (Btx1, Btx2 horizons)
Paralithic contact: 155 to 170 cm or 61 to 67 inches (Cr horizon)
Lithic contact: 170 to 203 cm or 67 to 80 inches (R horizon)
This series would classify as Fragic Oxyaquic Hapludults, but currently no such subgroup exists in the Hapludults great group. The semiactive CEC class is assigned to this series, but this soil borders on the semiactive and active groups.
ADDITIONAL DATA: Lab data is available for the typical pedon S87IN-143-001 at the National Soil Survey Lab, Lincoln, NE.