LOCATION RAVEENWASH ILEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, mesic Aquic Udifluvents
TYPICAL PEDON: Raveenwash silt loam - on a nearly level slope in a cultivated field. (Colors are for moist soil conditions unless otherwise stated.)
Ap--0 to 6 inches; brown (10YR 4/3) silt loam; weak very fine granular structure; friable; many very fine and fine roots; strongly effervesent; moderately alkaline; abrupt smooth boundary.
C1--6 to 17 inches; brown (10YR 4/3) and (10YR 5/3), and dark brown (10YR 3/3) stratified silt loam and very fine sandy loam; massive; friable; common very fine and fine roots; strongly effervesent; moderately alkaline; gradual smooth boundary.
C2--17 to 27 inches; yellowish brown (10YR 5/4) and brown (10YR 4/3) stratified loam and fine sand; massive; friable; few very fine and fine roots; strong effervesence; moderately alkaline; gradual smooth boundary.
C3--27 to 34 inches; brown (10YR 5/3) and dark grayish brown (2.5Y 4/2) stratified loam and sandy loam; massive; friable; few very fine and fine roots; few prominent dark brown (7.5YR 3/4) iron accumulations in root channels and/or pores; strongly effervesent; moderately alkaline; diffuse smooth boundary.
C4--34 to 45 inches; dark grayish brown (10YR 4/2) and dark yellowish brown (10YR 4/4) stratified loam and sandy loam; massive; friable; strongly effervesent; moderately alkaline; diffuse smooth boundary.
C5--45 to 60 inches; yellowish brown (10YR 5/4), brown (10YR 4/3) and grayish brown (2.5Y 5/2) stratified sand, sandy loam, and silt loam; massive; friable; strongly effervesent; moderately alkaline.
TYPE LOCATION: Woodford County, Illinois; about 2 miles northeast of Spring Bay: 1120 feet north and 960 feet east of the southwest corner of section 29, T. 28 N., R. 3 W.
RANGE IN CHARACTERISTICS: The thickness of the solum ranges from 5 to 15 inches. The depth to free calcium carbonate is less than 10 inches and is commonly at the surface.
The A horizon has hue of 10YR or 2.5Y; value of 2 to 4 and chroma of 1 to 3. It is commonly silt loam. It contains less than 10 percent gravel.
The C horizon has hue of 10YR, 2.5Y, or 5Y; value of 2 through 7 and chroma of 1 through 8. It is stratified silt loam, loam, sandy loam, loamy sand, and sand. Sand content ranges from 10 to 95 percent, and clay content ranges 1 to 27 percent. It contains less than 10 percent gravel.
COMPETING SERIES: There are no competing series. Some similarly positioned soils are the Jules, Landes and Slacwater soils. The Jules soils are moderately well drained and well drained coarse-silty. Slacwater soils are poorly drained and fine-silty. Landes soils are moderately well and well drained and have deeper solums and depths to calcium carbonates and have a mollic epipedon.
GEOGRAPHIC SETTING: Raveenwash soils are on flood plains and formed from material washed from adjacent uplands. Slopes gradients ranges from 0 to 2 percent. Mean annual air temperature is 50 degrees F. Mean annual precipation is 36 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Calco, Jules, Lena and Slacwater soils. The Calco soils have a thick dark surface, and are fine-silty. Jules soils are moderately well drained and well drained are coarse-silty. Lena soils are organic and are in depressions and toeslope seepy areas. Slacwater soils are fine-silty and are on more frequently flooded areas closer to the river.
DRAINAGE AND PERMEABILTY: Somewhat poorly drained. Flooding is occasional. In most pedons the upper C horizons still retain relic colors of the material washed in. The water table 1 to 2 feet below the surface. The water table is actually higher than is supported by soil color. Surface runoff is slow. Permeability is moderately rapid and rapid.
USE AND VEGETATION: Most areas are used to grow corn and soybeans. Other crops include small grain. Native vegetation was grasses and deciduous trees. They are not significant to development of these soils because the soils are of such recent origin.
DISTRIBUTION AND EXTENT: Along major streams and rivers in western Illinois. Extent is small.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES PROPOSED: Woodford County, Illinois, 1993.
REMARKS: Diagnostic horizons and features recognized in this pedon are: ochric epipedon - the zone from the surface of the soil to a depth of 10 inches (A or Ap horizon); calcareous reaction class; a udic soil moisture regime.