LOCATION ARMIESBURG IN+IL

Established Series
Rev. BGN-TJE
11/2011

ARMIESBURG SERIES

The Armiesburg series consists of very deep, well drained soils that formed in alluvium. These soils are on flood plains and flood plain steps. Slope ranges from 0 to 2 percent. Mean annual precipitation is about 1067 mm (42 inches), and mean annual temperature is about 12.2 degrees C (54 degrees F).

TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Fluventic Hapludolls

TYPICAL PEDON: Armiesburg silty clay loam, on a nearly level slope in a cultivated field. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 20 cm (8 inches); very dark grayish brown (10YR 3/2) silty clay loam, grayish brown (10YR 5/2) dry; moderate medium granular structure; friable; slightly alkaline; abrupt smooth boundary.

A--20 to 41 cm (8 to 16 inches); very dark grayish brown (10YR 3/2) silty clay loam, grayish brown (10YR 5/2) dry; moderate medium angular blocky structure; firm; slightly alkaline; clear wavy boundary. [Combined thickness of the A horizon is 25 to 51 cm (10 to 20 inches).]

Bw1--41 to 61 cm (16 to 24 inches); brown (10YR 4/3) silty clay loam; weak coarse prismatic structure parting to moderate medium subangular blocky; firm; common distinct very dark grayish brown (10YR 3/2) organic coatings on faces of peds; neutral; clear wavy boundary.

Bw2--61 to 96 cm (24 to 38 inches); yellowish brown (10YR 5/4) silty clay loam; weak very coarse prismatic structure parting to weak coarse subangular blocky; firm; neutral; gradual wavy boundary. [Combined thickness of the Bw horizon is 38 to 102 cm (15 to 40 inches).]

C--96 to 152 cm (38 to 60 inches); brown (10YR 5/3) silty clay loam; massive; firm; neutral.

TYPE LOCATION: Knox County, Indiana; 2,800 feet south and 50 feet west of the northeast corner of sec. 28, T. 5 N., R. 7 W.; USGS Plainville, Ind. Topographic quadrangle; lat. 38 degrees 50 minutes 27 seconds N. and 87 degrees 11 minutes 14 seconds W., NAD 27; UTM Zone 16, 483752 easting and 4299131 northing, NAD 83.

RANGE IN CHARACTERISTICS:
Depth to the base of the cambic horizon: 89 to 152 cm (35 to 60 inches)
Organic-carbon content: 0.3 to 0.5 percent at a depth of 127 cm (50 inches)
Particle-size control section: averages 25 to 35 percent clay
Thickness of the mollic epipedon: 25 to 51 cm (10 to 20 inches)

Ap or A horizon:
Hue: 10YR
Value: 2 or 3
Chroma: 1 to 3
Texture: silt loam or silty clay loam
Reaction: moderately acid to slightly alkaline

Bw horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 3 or 4
Texture: silty clay loam or silt loam in the upper part and includes clay loam in the lower part
Reaction: slightly acid or neutral

Some pedons have a BC horizon.

C horizon:
Hue: 10YR
Value: 3 to 5
Chroma: 3 or 4
Texture: silty clay loam, silt loam, or loam
Reaction: slightly acid to slightly alkaline

COMPETING SERIES: These are the Battleground, Bismarckgrove, Dozaville, Dungan (T), and Omadi series. Battleground, Bismarckgrove, and Omadi soils have carbonates present within the series control section. Dozaville soils average less than 25 percent clay in the particle-size control section. Dungan soils formed in areas where the difference between the average winter and summer soil temperature is less than 9 degrees C.

GEOGRAPHIC SETTING: Armiesburg soils are on flood plains or flood plain steps. Slope ranges from 0 to 2 percent. These soils formed in alluvium. Mean annual precipitation ranges from 889 to 1143 mm (35 to 45 inches). Mean annual temperature ranges from 10.0 to 13.9 degrees C (50 to 57 degrees F). Frost- free period is 150 to 210 days. Elevation is 110 to 259 meters (360 to 850 feet) above sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Haymond, Nolin, Petrolia, Proctor, and Ross soils. The Haymond and Nolin soils are on similar landform positions and do not have a dark colored surface layer. The poorly drained or very poorly drained Petrolia soils do not have a dark colored surface layer and are in backswamp positions. The Proctor soils are on stream terraces. The Ross soils have a thicker surface layer and are on similar landform positions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. Potential for surface runoff is negligible to low. Saturated hydraulic conductivity is moderately high. Permeability is moderate.

USE AND VEGETATION: Most areas are used to grow corn and soybeans. Native vegetation is mixed, and consists of deciduous hardwood forests and prairie grasses.

DISTRIBUTION AND EXTENT: MLRAs 108A, 111B, 111D, 114A, 114B, 115A, and 120A in central and southwestern Indiana and southeastern Illinois. The series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana.

SERIES ESTABLISHED: Parke County, Indiana, 1965.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from the surface to a depth of 41 cm (16 inches) (Ap and A horizons).
Cambic horizon: from a depth of 41 to 96 cm (16 to 38 inches) (Bw1, Bw2).

The organic carbon in the typical pedon is .46 percent at 127 cm (50 inches).

11/2011 Revision: formatting change to semi-tabular; added metric units; added lat/long/UTM coordinates; updated competing series.

ADDITIONAL DATA: Purdue Soil Characterization Laboratory S76IN83-19-(1-5) (typical pedon), S75IN83-3-(1-5), S74IN165-2-(1-5), S74IN165-3-(1-5), S76IN109-22-(1-6), S77IN21-29-(1-6), S79IN125-20-(1-7), S80IN55-9-(1-9), and NSSL S90IN-119-056.

National Cooperative Soil Survey
U.S.A.