LOCATION PATRICKSBURG INEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Aeric Fragiaqualfs
TYPICAL PEDON: Patricksburg silt loam, on a 1 percent slope in a cultivated field at an elevation of about 210.4 meters (690 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 20 cm (0 to 8 inches); brown (10YR 5/3) silt loam, very pale brown (10YR 7/3) dry; weak fine and medium granular structure; friable; many very fine and fine roots; many fine and very fine interstitial and tubular pores; neutral; abrupt smooth boundary. [15 to 25 cm (6 to 10 inches) thick]
EB--20 to 28 cm (8 to 11 inches); pale brown (10YR 6/3) silt loam; weak medium platy structure; friable; common very fine and fine roots; common fine and very fine interstitial and tubular pores; many fine distinct yellowish brown (10YR 5/6) masses of oxidized iron in the matrix; common fine spherical iron-manganese concretions; many fine faint light brownish gray (10YR 6/2) iron depletions in the matrix; strongly acid; clear wavy boundary. [5 to 20 cm (2 to 8 inches) thick]
Bt--28 to 46 cm (11 to 18 inches); pale brown (10YR 6/3) silt loam; weak fine subangular blocky structure; friable; common very fine and fine roots; common fine and very fine tubular pores; common distinct grayish brown (10YR 5/2) clay films on vertical and horizontal faces of peds; common fine prominent yellowish brown (10YR 5/8) masses of oxidized iron in the matrix; common fine and medium spherical iron-manganese concretions; many fine faint light brownish gray (10YR 6/2) iron depletions in the matrix; many faint light brownish gray (10YR 6/2) clay depletions on vertical faces of peds; very strongly acid; gradual wavy boundary.
Btg--46 to 63 cm (18 to 25 inches); light brownish gray (10YR 6/2) silty clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; firm; few very fine and fine roots between peds; common very fine tubular pores; many distinct grayish brown (10YR 5/2) clay films on vertical and horizontal faces of peds; many fine prominent yellowish brown (10YR 5/6) masses of oxidized iron in the matrix; common fine and medium spherical iron-manganese concretions; many faint light brownish gray (10YR 6/2) clay depletions on vertical faces of peds; very strongly acid; abrupt irregular boundary. [Combined thickness of the Bt horizon is 25 to 51 cm (10 to 20 inches).]
Btgx1--63 to 89 cm (25 to 35 inches); light brownish gray (10YR 6/2) silty clay loam; moderate coarse prismatic structure; very firm; few very fine and fine roots between peds; common fine and very fine tubular pores; many distinct grayish brown (10YR 5/2) clay films on faces of peds; common fine prominent strong brown (7.5YR 5/8) masses of oxidized iron in the matrix; common fine spherical iron-manganese concretions; many faint light gray (10YR 7/2) clay depletions on vertical faces of peds; 50 percent brittle; very strongly acid; gradual wavy boundary.
Btgx2--89 to 117 cm (35 to 46 inches); light brownish gray (10YR 6/2) silty clay loam; strong very coarse prismatic structure; very firm; few very fine and fine roots between peds; common fine and very fine tubular and interstitial pores; many distinct grayish brown (10YR 5/2) clay films on faces of peds; many medium prominent strong brown (7.5YR 5/8) masses of oxidized iron in the matrix; common fine spherical iron-manganese concretions; many faint light gray (10YR 7/2) clay depletions on faces of peds; 2 percent sandstone channers; 65 percent brittle; very strongly acid; gradual wavy boundary. [Combined thickness of the Btgx horizon is 25 to 61 cm (10 to 24 inches).]
Btx--117 to 140 cm (46 to 55 inches); yellowish brown (10YR 5/6) silt loam; moderate very coarse prismatic structure; very firm; many distinct grayish brown (10YR 5/2) clay films on faces of peds; common fine and medium spherical iron-manganese concretions; many medium prominent light brownish gray (10YR 6/2) iron depletions in the matrix; many prominent light gray (10YR 7/2) clay depletions faces of peds; 2 percent sandstone channers; 70 percent brittle; strongly acid; gradual wavy boundary. [20 to 51 cm (8 to 20 inches) thick]
2Bt1--140 to 168 cm (55 to 66 inches); yellowish brown (10YR 5/4) silt loam; weak coarse subangular blocky structure; friable; common distinct dark yellowish brown (10YR 4/6) clay films on vertical and horizontal faces of peds; common fine prominent strong brown (7.5YR 5/8) masses of oxidized iron in the matrix; common fine and medium spherical iron-manganese concretions; many medium distinct light brownish gray (10YR 6/2) iron depletions in the matrix; common distinct light brownish gray (10YR 6/2) clay depletions on vertical faces of peds; 5 percent sandstone channers; strongly acid; gradual wavy boundary.
2Bt2--168 to 193 cm (66 to 76 inches); yellowish brown (10YR 5/6) silt loam; weak coarse subangular blocky structure; firm; common distinct dark yellowish brown (10YR 4/6) clay films on faces of peds; common fine distinct strong brown (7.5YR 5/8) masses of oxidized iron in the matrix; common fine prominent light brownish gray (10YR 6/2) iron depletions in the matrix; 5 percent sandstone channers; strongly acid; abrupt smooth boundary. [Combined thickness of the 2Bt horizon is 30 to 61 cm (12 to 24 inches).]
2Cr--193 to 203 cm (76 to 80 inches); yellow (10YR 7/8) and light gray (2.5Y 7/2) interbedded weakly and moderately cemented siltstone and very strongly cemented sandstone.
TYPE LOCATION: Owen County, Indiana; about 2 miles north of Freedom and about 6 miles southwest of Spencer; 100 feet east and 800 feet north of the southwest corner of sec. 4, T. 9 N., R. 4 W.; USGS Freedom, IN topographic quadrangle; lat. 39 degrees 14 minutes 28.4 seconds N. and long. 86 degrees 52 minutes 8.1 seconds W.; UTM Zone 16, 511311 easting and 4228082 northing, NAD 83.
RANGE IN CHARACTERISTICS:
Depth to fragipan: 76 to 102 cm (30 to 40 inches)
Depth to the base of the argillic horizon: 152 to 203 cm (60 to 80 inches)
Depth to paralithic contact: 152 to 203 cm (60 to 80 inches)
Particle-size control section: averages 22 to 30 percent clay and 2 to 10 percent sand
Ap horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 2 or 3
Texture: silt loam
Reaction: very strongly acid or strongly acid in unlimed areas, and ranges to neutral in limed areas
EB horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 2 to 4
Texture: silt loam
Reaction: very strongly acid or strongly acid in unlimed areas, and ranges to neutral in limed areas
Bt or Btg horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 2 to 6
Texture: silt loam or silty clay loam
Clay content: 18 to 30 percent
Sand content: 2 to 10 percent
Reaction: very strongly acid or strongly acid
Btgx or Btx horizon:
Hue: 7.5 YR or 10YR
Value: 4 to 6
Chroma: 2 to 8
Texture: silt loam or silty clay loam
Clay content: 18 to 30 percent
Sand content: 5 to 20 percent
Brittleness: 50 to 75 percent of volume is brittle
Reaction: very strongly acid or strongly acid
2Bt horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 2 to 8
Texture: commonly silt loam or loam or the channery analogs of these textures, and less commonly sandy loam or clay loam or the channery analogs of these textures
Clay content: 15 to 27 percent
Sand content: 15 to 60 percent
Rock fragment content: 2 to 20 percent sandstone and siltstone rock fragments Reaction: very strongly acid or strongly acid
2Cr horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 4 to 8
Bedrock: fractured, interbedded weakly to moderately cemented siltstone, sandstone and shale, with beds of very strongly cemented sandstone
COMPETING SERIES: These are the Bartle, Doles, Dubois, Platea, Wadsworth, and Weinbach series. None of these soils have a paralithic contact within the series control section. Bartle soils formed in mixed silty or loamy alluvium and loess on stream terraces. Doles soils formed in loess and silty colluvium or old alluvium on valley fills in abandoned preglacial drainage systems. Dubois soils formed in loess and a palesol from loamy lacustrine sediments on lake plains. Platea and Wadsworth soils formed in Wisconsinan age till on till plains and moraines and have carbonates in the series control section. Weinbach soils formed in old acid alluvium on terraces.
GEOGRAPHIC SETTING: Patricksburg soils are on summits of hills underlain with interbedded siltstone, sandstone, and shale bedrock. Slope ranges from 0 to 2 percent. They formed in 102 to 152 cm (40 to 60 inches) of loess and in the underlying paleosol in residuum from sandstone, siltstone and shale. Mean annual precipitation ranges from 1016 to 1168 mm (40 to 46 inches). Mean annual air temperature ranges from 11.1 to 13.9 degrees C (52 to 57 degrees F). Frost-free days range from 170 to 200. Elevation ranges from 105.2 to 305 meters (345 to 1000 feet) above mean sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Potawatomi, Tulip, Wellston, and Zanesville soils on hills underlain with interbedded siltstone, sandstone, and shale. The moderately well drained Potawatomi soils are on narrow summits and shoulders. The well drained Tulip and Wellston soils are on backslopes. The moderately well drained Zanesville soils are on summits and shoulders.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. In undrained areas, the depth to the top of an intermittent perched high water table ranges from 15 to 46 cm (0.5 to 1.5 feet) between November and May in normal years. In drained areas, the depth to the top of an intermittent perched high water table is 15 to 61 cm (0.5 to 2.0 feet) between December and April in normal years. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/s) above the fragipan and low to moderately high (0.07 to 1.41 micrometers/s) in and below the fragipan. Permeability is moderate (0.6 to 2 inches per hour) above the fragipan and very slow or slow (0.01 to 0.2 inches per hour) in and below the fragipan. The potential for surface runoff is medium or high.
USE AND VEGETATION: Most areas are used to grow corn and soybeans. Some areas are used to grow small grain, hay and pasture. Native vegetation is deciduous hardwood forest.
DISTRIBUTION AND EXTENT: Southern Indiana; MLRA 120B. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Owen County, Indiana, 1997.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from the surface to a depth of 28 cm (11 inches) - (Ap, EB horizons);
Argillic horizon: from a depth of 28 to 193 cm (11 to 76 inches) - (Bt, Btg, Btxg, Btx, 2Bt horizons);
Fragipan: from a depth of 89 to 140 cm (35 to 55 inches) - (Btxg2, Btx horizons);
Paralithic contact: at 193 cm (76 inches) - (top of 2Cr horizon);
Aquic conditions: redox depletions with chroma of 2 in all horizons below a depth of 20 cm (8 inches).
ADDITIONAL DATA: Lab data is available for typical pedon S89IN-119-8 at the National Soil Survey Laboratory, Lincoln, Nebraska.