LOCATION LA HOGUE IL+INEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Argiudolls
TYPICAL PEDON: La Hogue loam - with about 1 percent slope in a cultivated field at an elevation of 675 feet (205.7 meters) 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) loam, dark gray (10YR 4/1) dry; weak fine angular fragments (cloddy) parting to weak fine granular structure; friable; neutral; abrupt smooth boundary.
A--25 to 41 cm (10 to 16 inches); very dark brown (10YR 2/2) loam, dark grayish brown (10YR 4/2) dry; weak medium subangular blocky structure parting to moderate fine granular; friable; neutral; clear smooth boundary. (Combined thickness of the A horizon is 25 to 48 cm or 10 to 19 inches.)
Bt1--41 to 66 cm (16 to 26 inches); brown (10YR 4/3) clay loam; weak medium prismatic structure; friable; common distinct very dark grayish brown (10YR 3/2) organo-clay films on faces of peds; many distinct dark grayish brown (10YR 4/2) clay films on faces of peds; few fine irregular black (7.5YR 2.5/1) weakly cemented iron and manganese oxide nodules throughout; few fine faint grayish brown (10YR 5/2) iron depletions in the matrix; few fine distinct yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; neutral; clear smooth boundary.
Bt2--66 to 91 cm (26 to 36 inches); brown (10YR 4/3) sandy clay loam; moderate medium prismatic structure; friable; many distinct dark grayish brown (10YR 4/2) clay films on faces of peds; few fine irregular black (7.5YR 2.5/1) weakly cemented iron and manganese oxide nodules throughout; few fine faint light brownish gray (10YR 6/2) iron depletions in the matrix; few fine prominent strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; neutral; clear smooth boundary.
Bt3--91 to 109 cm (36 to 43 inches); brown (10YR 4/3) sandy loam; weak medium prismatic structure; friable; many distinct dark grayish brown (10YR 4/2) clay films on faces of peds; common medium irregular black (7.5YR 2.5/1) weakly cemented iron and manganese oxide nodules throughout; common medium distinct reddish brown (5YR 4/4) and common medium distinct yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; neutral; gradual smooth boundary. (Combined thickness of the Bt horizon is 43 to 119 cm or 17 to 47 inches.)
Cg1--109 to 137 cm (43 to 54 inches); 75 percent grayish brown (10YR 5/2) and 25 percent strong brown (7.5YR 5/6) sandy loam; massive; very friable; common medium irregular black (7.5YR 2.5/1) weakly cemented iron and manganese oxide nodules throughout; common medium prominent reddish brown (5YR 4/4) masses of iron and manganese accumulation in the matrix; neutral; abrupt smooth boundary.
Cg2--137 to 155 cm (54 to 61 inches); gray (10YR 5/1) sandy loam; massive; friable; common medium rounded black (7.5YR 2.5/1) weakly cemented iron and manganese oxide nodules throughout; few medium prominent yellowish brown (10YR 5/8) masses of iron accumulation in the matrix; neutral; abrupt smooth boundary.
Cg3--155 to 165 cm (61 to 65 inches); 55 percent light olive gray (5Y 6/2) and 45 percent brownish yellow (10YR 6/6) silt loam; massive; friable; common medium prominent yellowish brown (10YR 5/8) masses of iron accumulation in the matrix; neutral; gradual smooth boundary.
Cg4--165 to 203 cm (65 to 80 inches); 60 percent light brownish gray (2.5Y 6/2) and 40 percent yellowish brown (10YR 5/8) stratified silt loam and loam; massive; friable; strongly effervescent; slightly alkaline.
TYPE LOCATION: Champaign County, Illinois; about 2 miles (3.2 kilometers) west of Ogden; 1910 feet (582.2 meters) north and 150 feet (582.2 meters) east of the southwest corner of sec. 7, T. 19 N., R. 14 W.; USGS Homer topographic quadrangle; lat. 40 degrees 7 minutes 5 seconds N. and long. 87 degrees 59 minutes 39 seconds W., NAD 27; UTM Zone 16, 415281 easting and 4441338 northing, NAD 83.
RANGE IN CHARACTERISTICS: The depth to the base of the argillic horizon ranges from 89 to 152 cm (35 to 60 inches). The mollic epipedon ranges from 25 to 61 cm (10 to 24 inches) in thickness and includes the upper part of the B horizon in some pedons. La Hogue soils have a moderate degree of development and therefore typically have weak or moderate structure throughout. The particle-size control section averages between 18 and 35 percent clay and between 15 and 55 percent fine sand or coarser.
The Ap, A horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2. It typically is loam, but the range includes sandy loam or silt loam. Clay content ranges from 10 to 27 percent and sand content ranges from 20 to 70 percent. It ranges from moderately acid to slightly alkaline.
Some pedons have an AB or a BA horizon.
The Bt horizon has properties as follows. In the upper part, it has hue of 10YR or 7.5YR, and less commonly 2.5Y; value of 4 to 6; and chroma of 2 to 6. It is sandy clay loam, loam, or clay loam, but may be sandy loam in individual subhorizons. Some pedons contain subhorizons of silty clay loam or silt loam with high content of sand. Clay content ranges from 18 to 35 percent and sand content ranges from 15 to 60 percent. It ranges from strongly acid to neutral. Many pedons are most acid in the upper part of the Bt horizon. The lower part of the Bt horizon has hue of 10YR, 2.5Y, or 5Y, value of 4 to 6, and chroma of 2 to 6. It is sandy loam, sandy clay loam, or loamy sand, with thin strata of loam or silt loam in some pedons. Clay content ranges from 10 to 25 percent and sand content ranges from 30 to 85 percent. Gravel content is less than 7 percent. It ranges from moderately acid to slightly alkaline.
Some pedons have a BC horizon with the same range of colors, textures, and reaction as the lower part of the Bt horizon.
The Cg or C horizon has hue of 7.5YR, 10YR, 2.5Y, 5Y, or is neutral; value of 4 to 6; and chroma of 0 to 8. It commonly is stratified; textures of individual strata typically range from sand to silt loam, but some pedons contain coarse sand or fine gravel either in the matrix or as thin strata. Clay content ranges from 5 to 20 percent and sand content ranges from 30 to 90 percent. Rock fragment content is less than 15 percent. The Cg or C horizon ranges from slightly acid to slightly alkaline and generally does not have carbonates above a depth of 60 inches (152 cm).
Some pedons have loam till below the stratified outwash and a till substratum phase is currently recognized.
COMPETING SERIES: These are the Andres, Aztalan, Darroch, Francesville, Gilboa, Houstenader, Lahoguess, Le Sueur, Marcellon, Newhaven, Odell, Protivin, and Vigar series. Andres soils have more than 20 percent clay and less than 30 percent sand in the lower part of the control section. Aztalan average more than 25 percent clay in the lower part of the series control section. Darroch, Marcellon, and Odell soils have carbonates within a depth of 60 inches (152 cm). Francesville soils have limestone bedrock within the series control section. Gilboa soils formed in up to 20 inches (51 cm) of silty material and contain less sand and more clay in the lower part of the series control section. Houstenader soils have more than 15 percent gravel in the lower part of the series control section. Lahoguess soils average more than 80 percent sand in the lower part of the series control section. Le Sueur soils do not have stratification with sandy textures in the lower half of the control section. Newhaven soils have lamella in the lower part of the argillic horizon. Protivin soils have more than 20 percent clay in the lower part of the solum. Vigar soils have a mollic epipedon greater than 61 cm (24 inches) in thickness.
GEOGRAPHIC SETTING: La Hogue soils are on stream terraces and outwash plains. They formed in loamy and sandy outwash material of mixed mineralogy of Wisconsinan Age. Some pedons have a thin mantle of loess or other silty material on the surface. Slopes commonly are 1 to 2 percent but range from 0 to 5 percent. Mean annual air temperature ranges from 8 to 12 degrees C (46 to 54 degrees F), mean annual precipitation ranges from 74 to 102 cm (29 to 40 inches), frost-free period ranges from 150 to 190 days, and elevation ranges from 122 to 311 meters (400 to 1020 feet) above mean sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brenton, Drummer, Jasper, Lomax, Onarga, Proctor, Ridgeville, and Selma soils. Brenton, Drummer, and Proctor soils contain more silt and less sand in the particle-size control section and are on nearby landscapes that contain a mantle of loess or silty material more than 51 cm (20 inches) thick. Jasper, Lomax, and Onarga soils generally are upslope and are better drained and lack chroma of 2 in the upper part of the B horizon. Ridgeville soils are on similar nearby landscapes and contain less clay. Selma soils are on nearby lower-lying landscapes, are poorly drained, and have low chroma and more yellow hue throughout the B horizon.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. An apparent seasonal high water table is at a depth of 30 to 61 cm (1 to 2 feet) at some time between January and May in normal years. The potential for surface runoff is low or medium. Permeability is moderate. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/second).
USE AND VEGETATION: Mainly used to grow corn, soybeans, small grain, and meadow. Native vegetation is prairie grass.
DISTRIBUTION AND EXTENT: Illinois, Wisconsin, and Iowa. Extent is moderate.
MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana.
SERIES ESTABLISHED: Iroquois County, Illinois, 1939.
REMARKS: A till substratum phase is recognized. This soil will be evaluated during MLRA updating to determine if new series needed.
Diagnostic horizons and features recognized in this pedon are: mollic epipedon 0 to 41 cm (0 to 16 inches) (Ap and A horizons); argillic horizon 41 to 109 cm (16 to 43 inches) (Bt1, Bt2, and Bt3 horizons); aquic conditions - redoximorphic features in all horizons below the mollic epipedon; udic moisture regime; mesic temperature regime.