LOCATION PIANKESHAW INEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Dystric Fluventic Eutrudepts
TYPICAL PEDON: Piankeshaw silt loam, on a nearly level
area in a hay field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; brown (10YR 4/3) silt loam, pale brown
(10YR 6/3) dry; weak fine granular structure; friable; many fine roots; 12 percent channers; neutral; abrupt smooth boundary. (6 to 10 inches thick)
Bw1--6 to 13 inches; dark yellowish brown (10YR 4/4) loam; weak medium subangular blocky structure parting to weak fine granular; friable; many fine roots; common distinct discontinuous dark brown (10YR 3/3) organic coatings on faces of peds; 14 percent channers; neutral; clear wavy boundary.
Bw2--13 to 20 inches; dark yellowish brown (10YR 4/4)
channery loam; weak coarse subangular blocky structure; friable; few distinct patchy dark brown (10YR 3/3) organic coatings on faces of peds; 25 percent channers; neutral; clear wavy boundary.
Bw3--20 to 26 inches; dark yellowish brown (10YR 4/4)
channery loam; weak coarse subangular blocky structure; friable; 20 percent channers; neutral; gradual wavy boundary. (Combined thickness of the Bw horizons is 14 to 35 inches).
C1--26 to 48 inches; brown (10YR 5/3) channery loam; few
fine distinct yellowish brown (10YR 5/6) mottles; massive;
friable; few dark brown (7.5YR 4/2) iron and manganese oxide concretions; 15 percent channers; neutral; gradual wavy boundary. (10 to 15 inches thick)
C2--48 to 60 inches; brown (10YR 4/3) very channery loam;
few fine faint brown (10YR 5/3) mottles; massive; friable; 50 percent channers; neutral.
TYPE LOCATION: Greene County, Indiana; 2,530 feet west and
2,200 feet south of the northeast corner of sec. 23, T. 6 N., R. 4 W.
RANGE IN CHARACTERISTICS: The depth to the base of the cambic horizon is 20 to 45 inches. The particle-size control section averages between 18 to 25 percent clay and range from 10 to 30 percent rock fragments. The rock fragments are dominantly as channers of sandstone, and include pebbles.
The upper part of the control section (Ap or A) has hue of 10YR, value of 4 or 5, and chroma of 3 or 4 and is silt loam. Rock fragments range from 5 to 14 percent. Reaction is moderately acid to neutral.
The second part of the control section (Bw) has hue of 10YR, value of 4 or 5, and chroma of 3 to 6. It is loam or channery loam. It has 8 to 30 percent rock fragments. Reaction is moderately acid to neutral.
The lower part of the control section (C) has hue of 10YR, value of 4 or 5, and chroma of 3 or 4. It is channery or very channery analogues of loam or sandy loam. Rock fragments range from 15 to 30 percent in the upper part and range to 60 percent in the lower part. Reaction is moderately acid to neutral.
COMPETING SERIES: These are the Chagrin, Knoxdale, and Sesnsabaugh series. The Chagrin and Knoxdale soils have less than 10 percent rock fragments in the particle size control section. The Sensabaugh soils have a buried A horizon.
GEOGRAPHIC SETTING: The Piankeshaw soils are on flood
plains. Slopes range from 0 to 2 percent. They formed in loamy and channery alluvium transported from loess capped sandstone and shale hills. The mean annual temperature ranges from 52 to 56 degrees F, and mean annual precipitation ranges from 40 to 44 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cuba, and Haymond soils on flood plains and the Berks, Gilpin, and Wellston soils on adjacent hills. The well drained, moderately deep Berks soils are on backslopes. The well drained, more silty Cuba and Hammond soils are on slightly higher lying floodplain steps. The well drained, moderately deep Gilpin soils, and the well drained, deep Wellston soils are on summits, shoulders and backslopes.
DRAINAGE AND PERMEABILITY: Well drained; permeability is moderate. Surface runoff is slow. This soil is subject to flooding of frequent periods of very brief duration.
USE AND VEGETATION: Most of this soil is used for woodland or pasture. A few areas are cropped to corn and soybeans. Native vegetation is deciduous hardwood forest.
DISTRIBUTION AND EXTENT: Southern Indiana. The acreage is of small extent, and mainly in MLRA 120.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Greene County, Indiana, 1984.
REMARKS: The classification of this series is changed from Typic Udifluvents to Dystric Fluventic Eutrochrepts. This classification is based on the estimated soil properties and may change as characterization data becomes available.
Diagnostic horizons and features recognized in
this pedon are: ochric epipedon - the zone from the surface of the soil to a depth of 6 inches (Ap horizon); cambic horizon - the zone from 6 to 26 inches (Bw1, Bw2, and Bw3 horizons).