LOCATION LAHOGUESS ILEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquic Argiudolls
TYPICAL PEDON: Lahoguess loam - on a southwest-facing slope with less than 1 percent gradient in a cultivated field at an elevation of 255 meters (835 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 23 cm (0 to 9 inches); black (10YR 2/1) loam, dark gray (10YR 4/1) dry; moderate fine and medium granular structure; friable; common very fine roots; slightly acid; clear smooth boundary.
A--23 to 36 cm (9 to 14 inches); very dark brown (10YR 2/2) loam, dark grayish brown (10YR 4/2) dry; moderate fine and medium subangular blocky structure parting to moderate fine granular; friable; common very fine roots; few distinct black (10YR 2/1) organic coatings on faces of peds; neutral; clear smooth boundary. [Combined thickness of the A horizon is 25 to 51 cm (10 to 20 inches).]
AB--36 to 46 cm (14 to 18 inches); very dark grayish brown (10YR 3/2) clay loam, brown (10YR 5/3) dry; moderate fine and medium subangular blocky structure; friable; common very fine roots; few distinct black (10YR 2/1) organic coatings on faces of peds; neutral; clear smooth boundary. [0 to 15 cm (0 to 6 inches) thick]
Bt1--46 to 74 cm (18 to 29 inches); olive brown (2.5Y 4/4) clay loam; weak medium prismatic structure parting to moderate fine and medium subangular blocky; friable; common very fine roots; few distinct olive brown (2.5Y 4/3) and dark grayish brown (2.5Y 4/2) clay films on faces of peds; common fine distinct yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; 1 percent gravel; neutral; clear smooth boundary.
Bt2--74 to 97 cm (29 to 38 inches); light olive brown (2.5Y 5/4) clay loam; moderate medium subangular blocky structure; friable; common very fine roots; few distinct olive brown (2.5Y 4/3) clay films on faces of peds; common medium dark gray (10YR 4/1) and very dark gray (10YR 3/1) krotovina; common fine and medium distinct yellowish brown (10YR 5/6) and prominent strong brown (7.5YR 4/6) masses of iron accumulation in the matrix; many fine and medium distinct light brownish gray (2.5Y 6/2) iron depletions in the matrix; 2 percent gravel; neutral; clear wavy boundary. [Combined thickness of the Bt horizon is 38 to 89 cm (15 to 35 inches).]
2BCg--97 to 117 cm (38 to 46 inches); grayish brown (2.5Y 5/2) stratified sandy loam and loam; weak medium subangular blocky structure; friable; common very fine roots; common medium dark gray (10YR 4/1) and very dark gray (10YR 3/1) krotovina; common fine and medium prominent brownish yellow (10YR 6/6) masses of iron accumulation in the matrix; many fine and medium faint light brownish gray (2.5Y 6/2) iron depletions in the matrix; 2 percent gravel; neutral; abrupt smooth boundary. [0 to 25 cm (0 to 10 inches) thick]
2C--117 to 152 cm (46 to 60 inches); 60 percent light olive brown (2.5Y 5/3) and 40 percent light yellowish brown (2.5Y 6/3) stratified loamy sand and sand; single grain; loose; 1 percent gravel; slightly alkaline.
TYPE LOCATION: McHenry County, Illinois, about 4 km (2.5 miles) northeast of Union; 180 m (591 feet) north and 290 m (951 feet) east of the southwest corner of sec. 23, T. 44 N., R. 6 E.; USGS Marengo North topographic quadrangle; lat. 42 degrees 16 minutes 15 seconds N. and long. 88 degrees 30 minutes 26 seconds W., NAD 27; UTM Zone 16, 375697 easting and 4680950 northing, NAD 83.
RANGE IN CHARACTERISTICS: The depth to the base of soil development and the depth to horizons with more than 80 percent sand ranges from 89 to 140 cm (35 to 55 inches). The mollic epipedon ranges from 25 to 51 cm (10 to 20 inches) in thickness. The series control section ranges from moderately acid to neutral in the upper two parts of the control section and from slightly acid to moderately alkaline and in the lower two parts.
The upper part of the series control section (Ap, A, and/or AB horizon) has hue of 10YR, value of 2 or 3, and chroma of 1 to 3. It is loam or silt loam.
The second part of the series control section (Bt and/or Btg horizon) has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 6. It is loam or clay loam. The average clay content ranges from 20 to 32 percent, and average sand content ranges from 20 to 50 percent.
The third part of the series control section (2BCg, 2BC, 2Bt, and/or 2Btg horizon) has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 6. It is sandy loam, loam, or loamy sand. The average clay content ranges from 5 to 20 percent, and the average sand content ranges from 40 to 80 percent. Gravel content ranges from 0 to 10 percent.
The lower part of the series control section (2C and/or 2Cg horizon) has hue of 7.5YR, 10YR, or 2.5Y; value of 4 to 6; and chroma of 2 to 8. It is loamy sand or sand. Sand content averages between 80 and 98 percent. The sand fraction is more than 50 percent medium and coarse sand. Gravel content ranges from 0 to 15 percent.
COMPETING SERIES: These are the Andres, Aztalan, Darroch, Francesville, Gilboa, Houstenader, La Hogue, Le Sueur, Marcellon, Newhaven, Odell, Protivin, and Vigar series. Andres, Aztalan, Darroch, Gilboa, Houstenader, La Hogue, Le Sueur, Marcellon, Odell, Protivin, and Vigar soils average less than 80 percent sand in the lower part of the series control section. Francesville soils have densic contact within a depth of 102 cm (40 inches). Newhaven soils are more than 140 cm (55 inches) to the base of soil development.
GEOGRAPHIC SETTING: Lahoguess soils are on outwash plains and stream terraces. Slopes range from 0 to 2 percent. Lahoguess soils formed in loamy outwash overlying sandy sediments. The mean annual air temperature ranges from 7 to 12 degrees C (44 to 53 degrees F.), the mean annual precipitation ranges from 740 to 1020 mm (29 to 40 inches), frost free days range from 140 to 180 days, and elevation ranges from 207 to 311 m (680 to 1020 feet) above sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dakota, Dickinson, Hoopeston, and Selmass soils. The well drained Dakota and Dickinson soils are on higher landform positions. Hoopeston soils are on similar nearby landform positions and contain less clay in the upper one-half of the series control section. The poorly drained Selmass soils are on lower landform positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained. An intermittent apparent high water table is at a depth of 30 to 76 cm (1.0 foot to 2.5 feet) below the surface in most years. The potential for surface runoff is low. Saturated hydraulic conductivity is moderately high or high (4.23 to 42.33 micrometers per second) in the solum and high or very high (42.33 to 141.11 micrometers per second) in the underlying material. Permeability is moderate to moderately rapid in the solum and rapid in the underlying material.
USE AND VEGETATION: Most areas are cultivated. Principal crops are corn, soybeans, and small grain. Native vegetation is tall prairie grasses.
DISTRIBUTION AND EXTENT: Northern Illinois. Extent is small in MLRA 95B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: McHenry County, Illinois, 1996. The name Lahoguess is derived from the La Hogue series with a sandy substratum.
REMARKS: This soil was formerly mapped La Hogue in McHenry County. Through MLRA update activities the areas were found to average more than 80 percent sand in the lower part of the series control section whereas La Hogue soils average 30 to 80 percent.
Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface to a depth of 46 cm (18 inches) (Ap, A, and AB horizons); argillic horizon - the zone from 46 to 97 cm (18 to 38 inches) (Bt1 and Bt2 horizons); discontinuity at a depth of 97 cm (38 inches) - the contact between the Bt2 and 2BCg horizons.