LOCATION MADILL OKEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, active, nonacid, thermic Typic Udifluvents
TYPICAL PEDON: Madill fine sandy loam--pasture. (Colors are for moist soil unless otherwise stated.)
A1--0 to 41 centimeters (0 to 16 inches); brown (10YR 4/3) fine sandy loam, brown (10YR 5/3) dry; weak fine granular structure; soft, friable; organic stains in some root channels; slightly acid; clear smooth boundary. (10 to 51 centimeters (4 to 20 inches) thick)
C1--41 to 76 centimeters (16 to 30 inches); brown (7.5YR 4/4) fine sandy loam, light brown (7.5YR 6/4) dry; massive; slightly hard, friable; few thin strata of dark yellowish brown (10YR 4/4) loam; organic stains in pores; slightly acid; clear smooth boundary. (25 to 51 centimeters (10 to 20 inches) thick)
C2--76 to 102 centimeters (30 to 40 inches); reddish brown (5YR 4/4) loam, reddish brown (5YR 5/4) dry; massive; slightly hard, friable; few thin strata of dark reddish brown (5YR 3/2) loam; moderately acid; clear smooth boundary. (25 to 61 centimeters (10 to 24 inches) thick)
C3--102 to 173 centimeters (40 to 68 inches); reddish brown (5YR 5/4) loam, light reddish brown (5YR 6/4) dry; massive; hard, friable; few thin strata of dark reddish brown (5YR 3/4) loam; moderately acid.
TYPE LOCATION: Bryan County, Oklahoma; about 27 kilometers (17 miles) east of Durant, Oklahoma. About 512 meters (1,680 feet) east and 46 meters (150 feet) north of the southwest corner in sec. 20, T. 6 S., R. 12 E.
RANGE IN CHARACTERISTICS:
Reaction: medium acid to neutral above 102 centimeters (40 inches) and medium acid to moderately alkaline below 102 centimeters (40 inches)
Buried soils: in some pedons at depths below 102 centimeters (40 inches)
A horizon:
Hue: 5YR to 10 YR
Value: 3 to 5
Chroma: 2 to 4
Texture: fine sandy loam, loam, or loamy fine sand
C horizon
Hue: 10YR to 5YR
Value: 4 to 6
Chroma: 2 to 8
Texture: fine sandy loam or loam
Clay content: 5 to 18 percent above a depth of 102 centimeters (40 inches)
Texture: fine sandy loam, loam, or loamy fine sand below 102 centimeters (40 inches)
Thin strata of coarser or fine material occur throughout the C horizon.
COMPETING SERIES: This is the
Toccoa series.
Toccoa soils contain flakes of mica throughout the profile.
GEOGRAPHIC SETTING:
Landform: nearly level or very gently sloping flood plains
Parent material: sandy and loamy alluvium
Average annual precipitation: 97 to 127 centimeters (38 to 50 inches)
Mean annual temperature: 14 to 19 degrees C. (58 degrees to 66 degrees F.) Thornthwaite P-E index: 64 to 80
Flooding: occasionally or frequently flooded for very brief periods during the months of February through July
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Tullahassee and
Verdigris series.
Tullahassee soils have wetness mottles within 51 centimeters (20 inches) of the soil surface.
Verdigris soils have a mollic epipedon and a fine-silty control section.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: well drained
Runoff: negligible
Saturated hydraulic conductivity: moderately high
USE AND VEGETATION: Used primarily for grazing.
Bermudagrass is the main grass.
Some areas are cultivated to small grains, cotton, peanuts, and soybeans. Native vegetation is mainly red oaks, hickory, pecan, elm, and sycamore with an understory of grasses.
DISTRIBUTION AND EXTENT: Eastern Oklahoma, possibly Arkansas, Louisiana, and Texas. The soil is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Bryan County, Oklahoma; 1975.
REMARKS: These soils were previously included in the Pulaski series and classified in the Alluvial great soil group.
Modified format by LRM in 1/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.