LOCATION WHITEPOST INEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Endoaquolls
TYPICAL PEDON: Whitepost fine sandy loam, on a slope of less than 1 percent in a cultivated field at an elevation of 677 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 9 inches; very dark brown (10YR 2/2) fine sandy loam, dark grayish brown (10YR 4/2) dry; weak fine subangular blocky structure parting to moderate fine granular; friable; common very fine to medium roots throughout; common fine tubular pores; neutral; abrupt smooth boundary.
A--9 to 12 inches; very dark grayish brown (10YR 3/2) fine sandy loam, dark grayish brown (10YR 4/2) dry; moderate medium subangular blocky structure; friable; common very fine and fine roots throughout; common fine tubular pores; neutral; clear wavy boundary. (Combined thickness of the A horizon is 10 to 20 inches.)
Bg1--12 to 17 inches; grayish brown (10YR 5/2) fine sandy loam; moderate medium subangular blocky structure; very friable; common very fine roots throughout; common fine tubular pores; common medium prominent yellowish brown (10YR 5/8) masses of iron oxide accumulation in the matrix; neutral; clear wavy boundary.
Bg2--17 to 25 inches; gray (10YR 5/1) fine sandy loam; moderate medium subangular blocky structure; friable; common very fine roots throughout; common medium distinct yellowish brown (10YR 5/4) and common medium prominent yellowish brown (10YR 5/8) masses of iron oxide accumulation in the matrix; neutral; clear wavy boundary.
Bg3--25 to 31 inches; gray (2.5Y 6/1) loamy fine sand; weak coarse subangular blocky structure; very friable; common very fine roots throughout; common fine tubular pores; many coarse prominent yellowish brown (10YR 5/4) and few fine prominent dark yellowish brown (10YR 4/6) masses of iron oxide accumulation in the matrix; neutral; clear wavy boundary.
Bg4--31 to 40 inches; grayish brown (10YR 5/2) loamy fine sand; single grain; loose; neutral; clear wavy boundary. (Combined thickness of the Bg horizon is 14 to 30 inches.)
Cg1--40 to 48 inches; gray (10YR 5/1) fine sand; single grain; loose; slightly effervescent; slightly alkaline; clear wavy boundary.
Cg2--48 to 54 inches; grayish brown (10YR 5/2) fine sand; single grain; loose; strongly effervescent; moderately alkaline; clear wavy boundary. (Combined thickness of the Cg horizon is 3 to 20 inches.)
2Cg3--54 to 80 inches; gray (10YR 5/1) silty clay; massive; firm; strongly effervescent; moderately alkaline.
TYPE LOCATION: Pulaski County, Indiana; about 3 miles north and 1 mile west of Francesville; 75 feet east and 1,000 feet south of the northwest corner of sec. 30, T. 30 N., R. 4 W.; U.S.G.S. Medaryville topographic quadrangle; lat. 41 degrees 1 minute 30.1 seconds N. and long. 86 degrees 54 minutes 38.3 seconds W., NAD 27; UTM Zone 16, 507510 easting and 4541542 northing, NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the base of the cambic horizon: 24 to 50 inches
Depth to silty lacustrine deposits: 40 to 60 inches
Sand content: averages more than 50 percent fine sand or coarser in the loamy and sandy sediments
Rock fragment content: 0 to 5 percent in the loamy and sandy sediments
Particle-size control section: averages more than 15 percent silt plus 1.5 times the clay content
Ap or A horizon:
Hue: 10YR or N
Value: 2, 2.5, or 3
Chroma: 0 to 2
Texture: fine sandy loam, loam, loamy fine sand, sandy loam, mucky sandy loam, or mucky fine sandy loam
Reaction: moderately acid to neutral
Bg horizon:
Hue: 10YR to 5Y
Value: 4 to 6
Chroma: 1 or 2
Redoximorphic features are present
Texture: fine sandy loam, sandy loam, loamy sand, or loamy fine sand; may contain strata of loam
Reaction: moderately acid to neutral
BCg horizon: (where present)
Hue: 10YR
Value: 5 or 6
Chroma: 1 or 2
Texture: loamy sand, loamy fine sand, sand, or fine sand
Reaction: neutral or slightly alkaline
Cg horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 1 or 2
Texture: sand or fine sand
Reaction: slightly alkaline or moderately alkaline
Calcium carbonate equivalent: 20 to 30 percent
2Cg horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 1 or 2
Texture: silty clay loam or silty clay
Clay content: 27 to 60 percent
Reaction: slightly alkaline or moderately alkaline
Calcium carbonate equivalent: 20 to 30 percent
COMPETING SERIES: These are the Corunna, Darfur, Dassel, Gilford, Goodell, Hanska, Jubilee, Lyles, Monon, Mudgepond (T), Overshue, Toolesboro, and Uniongrove series. Corunna soils have more than 5 percent rock fragments in the upper part of the series control section. Darfur and Overshue soils are in climates that have mean annual temperature of less than 48 degrees F., and receive less than 30 inches of mean annual precipitation. Dassel, Gilford, Goodell, Hanska, Lyles, Mudgepond, Toolesboro, and Uniongrove soils have less than 27 percent clay in the lower part of the series control section. Jubilee soils have a high mica content, are at elevations above 1,530 feet, and receive less than 30 inches of mean annual precipitation. Monon soils do not have carbonates in the lower part of the series control section.
GEOGRAPHIC SETTING: Whitepost soils formed in loamy and sandy sediments overlying silty lacustrine sediments on nearly level or depressional areas on outwash plains and lake plains. Slope gradients range from 0 to 1 percent. Mean annual temperature ranges from 48 to 53 degrees F., mean annual precipitation ranges from 30 to 42 inches, frost-free period ranges from 130 to 180 days, and elevation ranges from 580 to 1,530 feet above sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brady, Bronson, Gilford, Headlee, Medaryville, Mermill, Radioville, Rensselaer, and Whiskerville soils. The somewhat poorly drained Brady, Headlee, and Medaryville soils and the moderately well drained Bronson and Whiskerville soils are on swells on outwash plains and lake plains. Gilford and Rensselaer soils are on similar landforms but lack silty lacustrine sediments. Radioville soils are on similar landforms but have more clay in the subsoil.
DRAINAGE AND PERMEABILITY: Poorly drained or very poorly drained. The potential for surface runoff is negligible. Permeability is moderately rapid in the solum and slow or very slow in the silty lacustrine sediments.
USE AND VEGETATION: Soils are mostly cropped. Principal crops are corn, soybeans, wheat, and oats. Native vegetation is marsh grasses, reeds, sedges, pin oak, and red maple forests.
DISTRIBUTION AND EXTENT: MLRAs 98, 99, 110, and 111 in northern Indiana, and possibly in northern Ohio and northern Illinois. The soils are of small extent.
MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana.
SERIES ESTABLISHED: Pulaski County, Indiana, 2001.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from the surface to 12 inches (Ap, A horizon)
Cambic horizon: from 12 to 40 inches (Bg horizons)
Aquic conditions: chroma of 2 below the mollic epipedon and redoximorphic features in all horizons below 12 inches
The Whitepost series was proposed for the Gilford soils with lacustrine materials in the lower part of the series control section mapped in the Pulaski County, Indiana soil survey update.
NASIS Data Mapunit ID 155050 represents the typical pedon in complex with Gilford soils.
ADDITIONAL DATA: Lab characterization data is available for the typical pedon (S98IN-131-002) from the National Soil Survey Laboratory in Lincoln, NE. Transect data for the typical pedon (T97IN-131-182) is on file in MLRA project office, Plymouth, Indiana. Transect in a Whitepost-Gilford complex map unit shows 50 percent Whitepost, 40 percent Gilford, and 10 percent Granby, lacustrine substratum, soils.