LOCATION WHITEPOST IN

Established Series
Rev. RAB-GFF-DAG
11/2021

WHITEPOST SERIES

The Whitepost series consists of very deep, poorly drained or very poorly drained soils formed in loamy and sandy sediments overlying silty lacustrine sediments on outwash plains and lake plains. Slope ranges from 0 to 1 percent. Mean annual precipitation is about 889 mm (35 inches), and mean annual temperature is about 10.0 degrees C (50 degrees F).

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 206 maters (677 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 23 cm (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--23 to 30 cm (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 25 to 51 cm (10 to 20 inches).]

Bg1--30 to 43 cm (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 oxidized iron in the matrix; neutral; clear wavy boundary.

Bg2--43 to 64 cm (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 oxidized iron in the matrix; neutral; clear wavy boundary.

Bg3--64 to 79 cm (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 oxidized iron in the matrix; neutral; clear wavy boundary.

Bg4--79 to 102 cm (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 36 to 76 cm (14 to 30 inches).]

Cg1--102 to 122 cm (40 to 48 inches); gray (10YR 5/1) fine sand; single grain; loose; slightly effervescent; slightly alkaline; clear wavy boundary.

Cg2--122 to 137 cm (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 8 to 51 cm (3 to 20 inches).]

2Cg3--137 to 203 cm (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.; USGS 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: 61 to 127 cm (24 to 50 inches)
Depth to silty lacustrine deposits: 102 to 152 cm (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
Calcium carbonate equivalent: 20 to 30 percent
Reaction: slightly alkaline or moderately alkaline

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
Calcium carbonate equivalent: 20 to 30 percent
Reaction: slightly alkaline or moderately alkaline

COMPETING SERIES: These are the Darfur, Dassel, Gilford, Goodell, Hanska, Jubilee, Lyles, Monon, Mudgepond, Overshue, Toolesboro, and Uniongrove series. Darfur and Overshue soils are in climates that have mean annual temperature of less than 8.9 degrees C (48 degrees F), and receive less than 762 mm (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 466 meters (1,530 feet), and receive less than 762 mm (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 are on nearly level or depressional areas on outwash plains and lake plains. Slope ranges range from 0 to 1 percent. Whitepost soils formed in loamy and sandy sediments overlying silty lacustrine sediments. Mean annual precipitation ranges from 762 to 1067 mm (30 to 42 inches). Mean annual temperature ranges from 8.9 to 11.7 degrees C (48 to 53 degrees F). Frost-free period is 130 to 180 days. Elevation is 177 to 466 meters (580 to 1,530 feet) above mean 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 SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained or very poorly drained. Potential for surface runoff is negligible. Saturated hydraulic conductivity is high in the solum and moderately low or low in the lacustrine sediments. Permeability is moderately rapid in the solum and slow or very slow in the 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 and 111C in northern Indiana. The series is of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: AMHERST, MASSACHUSETTS

SERIES ESTABLISHED: Pulaski County, Indiana, 2001.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from the surface to a depth of 30 cm (12 inches) (Ap, A horizon).
Cambic horizon: from a depth of 30 to 102 cm (12 to 40 inches) (Bg horizons).
Aquic conditions: chroma of 2 below the mollic epipedon and in all underlying horizons.

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.

National Cooperative Soil Survey
U.S.A.