LOCATION REDDICK IL+IN

Established Series
Rev. KCH-JEP-AAC
12/2015

REDDICK SERIES

The Reddick series consists of very deep, poorly drained soils formed in 76 to 127 cm (30 to 50 inches) of loamy water-laid sediments over till or lacustrine sediments. Slope ranges from 0 to 2 percent. Mean annual air temperature is about 10 degrees C (50 degrees F), and mean annual precipitation is about 965 mm (38 inches).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Endoaquolls

TYPICAL PEDON: Reddick clay loam - on a nearly level area in a cultivated field at an elevation of 200 meters (657 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 25 cm (0 to 10 inches); black (10YR 2/1) clay loam, dark gray (10YR 4/1) dry; moderate fine and very fine granular structure; friable; slightly alkaline; abrupt smooth boundary.

A--25 to 33 cm (10 to 13 inches); very dark gray (10YR 3/1) clay loam, dark gray (10YR 4/1) dry; moderate fine granular structure; friable; slightly alkaline; clear smooth boundary. [Combined thickness of the A horizon is 25 to 61 cm (10 to 24 inches).]

Bg--33 to 48 cm (13 to 19 inches); dark gray (10YR 4/1) clay loam; weak fine prismatic structure parting to moderate very fine subangular blocky; firm; few fine faint grayish brown (10YR 5/2) iron depletions in the matrix; neutral; clear smooth boundary.

Btg1--48 to 64 cm (19 to 25 inches); gray (5Y 5/1) clay loam; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; common faint dark gray (10YR 4/1) clay films on faces of peds; common medium prominent yellowish brown (10YR 5/4) masses of iron accumulation in the matrix; many medium distinct grayish brown (10YR 5/2) iron depletions in the matrix; slightly alkaline; clear smooth boundary.

Btg2--64 to 81 cm (25 to 32 inches); gray (10YR 5/1) clay loam; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; few faint dark gray (10YR 4/1) clay films on faces of peds; many fine and medium prominent light olive brown (2.5Y 5/4) masses of iron accumulation in the matrix; 2 percent gravel; slightly alkaline; abrupt smooth boundary. [Combined thickness of the Bg and Btg horizons is 30 to 91 cm (12 to 36 inches).]

2Btg3--81 to 119 cm (32 to 47 inches); gray (5Y 6/1) silty clay loam; moderate medium prismatic structure parting to weak medium and coarse subangular blocky; firm; few faint gray (5Y 5/1) clay films on vertical faces of peds; many medium prominent yellowish brown (10YR 5/8) masses of iron accumulation in the matrix; common medium faint light gray (5Y 7/1) iron depletions in the matrix; 3 percent gravel; slightly effervescent; moderately alkaline; gradual wavy boundary. [8 to 41 cm (3 to 16 inches) thick]

2Cg--119 to 152 cm (47 to 60 inches); 70 percent gray (5Y 6/1) and 30 percent light gray (5Y 7/1) silty clay loam; massive; firm; many medium prominent yellowish brown (10YR 5/6) and yellowish brown (10YR 5/8) masses of iron accumulation in the matrix; 4 percent gravel; strongly effervescent; moderately alkaline.

TYPE LOCATION: Kankakee County, Illinois; about 1 mile southwest of Buckingham; 2,616 feet south and 27 feet east of the northwest corner of sec. 34, T. 30 N., R. 9 E.; USGS Buckingham topographic quadrangle; lat 41 degrees 01 minutes 57 seconds N. and long. 88 degrees 11 minutes 25 seconds W., NAD 27; UTM Zone 16, 399911 easting and 4543058 northing, NAD 83.

RANGE IN CHARACTERISTICS:
Depth to base of soil development: 89 to 140 cm (35 to 55 inches)
Depth to carbonates: 61 to 135 cm (24 to 53 inches
Depth of loamy water-laid sediments: 76 to 127 cm (30 to 50 inches)
Thickness of mollic epipedon: 25 to 61 cm (10 to 24 inches) in thickness.
Average clay content in particle-size control section: 18 to 35 percent
Average sand content in particle-size control section: greater than 15 percent (coarser than very fine sand)
Note: There is less than 25 percent difference in clay contents between the water-laid sediments and the till or lacustrine sediment within 102 cm (40 inches) of the surface.

Ap and/or A horizon:
Hue: 10YR or neutral
Value: 2 to 3
Chroma: 0 to 2
Texture: loam, clay loam, or silty clay loam
Reaction: slightly acid to slightly alkaline

Bg and/or Btg horizon:
Hue: 10YR, 2.5Y, or 5Y
Value: 4 to 6
Chroma: 1 or 2. Redoximorphic features commonly have higher chroma.
Texture: clay loam, loam, or silty clay loam with high sand content
Rock fragment content: less than 5 percent. Thin horizons of loamy sand or textures with up to 50 percent gravel are not excluded.
Reaction: slightly acid to slightly alkaline

2Bg or 2Btg horizon:
Hue: 10YR, 2.5Y, or 5Y
Value: 4 to 6
Chroma: 1 or 2. Redoximorphic features commonly have higher chroma.
Texture: silty clay loam and less commonly silty clay or clay.
Rock fragment content: less than 10 percent
Reaction: neutral to moderately alkaline

2Cg horizon:
Hue of 10YR, 2.5Y, or 5Y
Value: 4 to 6
Chroma: 1 to 6
Texture: silty clay loam and less commonly silty clay or clay. Some pedons have thin strata of coarser and finer textures.
Rock fragment content: less than 15 percent
Reaction: slightly alkaline or moderately alkaline

COMPETING SERIES: These are the Clyde, Faxon, Kossuth, Letri, Marengo, Mound Creek, Selma, Selmass, Tripoli, Webster, and Wolcott series. Clyde, Kossuth, Letri, Marengo, Selma, Selmass, Tripoli, Webster, and Wolcott soils contain more than 20 percent sand in the lower part of the series control section. Faxon and Mound Creek soils have a lithic contact within a depth of 102 cm (40 inches).

GEOGRAPHIC SETTING: Reddick soils formed in 76 to 127 cm (30 to 50 inches) of loamy water-laid sediments over till or lacustrine sediments. These soils are on nearly level to slightly undulating topography. Slope gradient is usually less than 1 percent but ranges from 0 to 2 percent. Mean annual temperature ranges from 8 to 12 degrees C (46 to 54 degrees F), mean annual precipitation ranges from 864 to 1016 mm (34 to 40 inches), frost-free period ranges from 155 to 190 days, and elevation ranges from 156 to 285 meters (512 to 935 feet) above sea level.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Andres, Elliott, Mokena, and Symerton soils. The somewhat poorly drained Andres soils and moderately well drained Symerton soils form a hydro-sequence with the Reddick soils and are on higher landform positions. Elliott and Mokena soils are somewhat poorly drained and are on slightly higher landform positions.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained. Where drained, an intermittent apparent seasonal high water table is 15 cm (0.5 foot) above the surface to 30 cm (1.0 foot) below the surface at some time between January and May in normal years. The potential for surface runoff is negligible. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/s) in the loamy material and moderately low or moderately high (0.14 to 1.41 micrometers/s) in the till or lacustrine sediments. Permeability is moderate in the loamy material and slow or very slow in the till or lacustrine sediments.

USE AND VEGETATION: Most areas are drained and are cultivated. Corn, soybeans, small grains, and meadow are the principal crops. Native vegetation is swamp grasses.

DISTRIBUTION AND EXTENT: Northern and eastern Illinois and northwestern Indiana. The series is of moderate extent in MLRAs 98, 110, and 111C with about 110,720 acres mapped.

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

SERIES ESTABLISHED: Kankakee County, Illinois, 1975.

REMARKS: SDJR - MLRA 110 - Reddick clay loam, 0 to 2 percent slopes project noted a study of those areas of Reddick correlated in MLRA 111C. The purpose of this investigation is to determine whether these soils are located within an isolated area of the Lake Michigan lobe where silty clay loam textured till is dominant.

Diagnostic horizons and features recognized in this pedon are:
mollic epipedon: 0 to 33 cm (13 inches) (Ap and A horizons);
cambic horizon: 33 to 119 cm (13 to 47 inches) (Bg, Btg1, Btg2, and 2Btg3 horizons);
lithologic discontinuity - at a depth of 81 cm (32 inches) (contact between the Btg2 and 2Btg3 horizons);
aquic moisture regime: chroma of 1 in the matrix and redoximorphic features present in the zone from 33 to 152 cm (13 to 60 inches) (Bg, Btg1, Btg2, 2Btg3, and 2Cg horizons).

National Cooperative Soil Survey
U.S.A.