LOCATION EUDY MOEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, mesic Aquic Hapludalfs
TYPICAL PEDON: Eudy silt loam - on a convex ridgetop with a 3 percent slope in a fescue pasture at an elevation of 1,290 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; mixed very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) silt loam, pale brown (10YR 6/3) dry; strong fine and very fine granular structure; very friable; common fine roots; many very fine irregular pores; 10 percent chert gravel; neutral (pH 7.1); abrupt smooth boundary. (3 to 10 inches thick)
Bt1--7 to 10 inches; mixed dark brown (10YR 3/3) and yellowish brown (10YR 5/4) silt loam; weak fine and medium subangular blocky structure; friable; common fine roots; common very fine tubular pores; few distinct clay films on faces of peds; 10 percent chert gravel; neutral (pH 7.3); clear smooth boundary. (0 to 16 inches thick)
2Bt2--10 to 14 inches; mixed dark brown (10YR 3/3) and yellowish brown (10YR 5/6) gravelly silty clay loam; strong fine angular blocky structure; very firm; common fine roots; many very fine tubular pores; few fine faint dark grayish brown (10YR 4/2) iron depletions; few fine black (N 2/0) iron and manganese oxide concretions; few prominent black (N 2/0) masses of iron and manganese oxide accumulation; common distinct clay films on faces of peds; 15 percent chert gravel; neutral (pH 7.3); clear wavy boundary.
2Bt3--14 to 21 inches; brown (10YR 4/3) gravelly silty clay; weak coarse prismatic structure parting to weak coarse and fine angular blocky; very firm; commom fine roots; many very fine tubular pores; common distinct clay films on faces of peds and in pores; few fine faint dark grayish brown (10YR 4/2) iron depletions; few fine prominent red (2.5YR 4/6) masses of iron accumulation; common fine black (N 2/0) iron and manganese oxide concretions; 25 percent chert gravel; slightly alkaline (pH 7.6); abrupt wavy boundary.
2Bt4--21 to 25 inches; mixed yellowish brown (10YR 5/6) and olive brown (2.5Y 4/4) gravelly clay; moderate coarse subangular blocky structure parting to weak fine angular blocky; very firm; common fine roots; many fine roots; common prominent clay films on faces of peds and in pores; common fine prominent gray (10YR 5/1) iron depletions; common fine prominent black (N 2/0) masses of iron and manganese oxide concretions; 20 percent chert gravel; slightly alkaline (pH 7.7); abrupt wavy boundary. (combined thickness of the Bt and 2Bt horizons is 15 to 35 inches)
3R--25 inches; dolostone
TYPE LOCATION: Texas County, Missouri; about 5 miles southeast of Houston; 650 feet north and 2,300 feet west of the southeast corner of Section 26, T. 30 N., R. 9 W.; USGS Houston quadrangle; latitude 37 degrees, 16 minutes, 7 seconds N., longitude 91 degrees, 53 minutes, 35 seconds W.
RANGE IN CHARACTERISTICS:
Depth to bedrock: 20 to 40 inches
Solum thickness: 20 to 40 inches
Mean annual soil temperature: 55 to 59 degrees F.
Ap or A horizon
Hue: 10YR
Value: 3 to 5
Chroma: 3 or 4
Rock fragments: 0 to 10 percent
Fine earth: silt loam
Reaction: moderately acid to neutral.
Bt horizon
Hue: 7.5YR or 10YR
Value: 3 to 5
Chroma: 3 to 6
Redox colors: hue 5YR to 10YR, value 4 to 6, chroma 2 or 3
Rock fragments: 0 to 10 percent
Fine earth: silt loam, silty clay loam
Reaction: very strongly acid to neutral
2Bt horizon
Hue: 5YR to 2.5Y
Value: 3 to 6
Chroma: 2 to 6
Redox color: hue 2.5YR to 10YR, value 4 to 6,chroma 1 to 8
Rock fragments: 0 to 30 percent
Fine earth: silty clay, clay
Reaction: very strongly acid to slightly alkaline
COMPETING SERIES: These are the Banister, Branchville, Cardinal, Celina, Hartville, Jerktail, Loudon, Tarlton, and Whippany series. Banister, Branchville, Cardinal, Celina, Hartville, Jerktail, and Whippany soils are deeper than 60 inches to a lithic or paralithic contact. Loudon soils are deeper than 40 inches to a lithic or paralithic contact. Tarlton soils have a mean annual soil temperature of less than 54 degrees F, and formed in glacial till deposited over acid shales.
GEOGRAPHIC SETTING: Eudy soils are on gently sloping, convex ridgetops, sideslopes and toeslopes. They formed in loess and the underlying clayey residuum from cherty dolostone. Slopes range from 1 to 8 percent. Mean annual temperature ranges from 54 to 58 degrees F., and the mean annual precipitation ranges from 40 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gatewood, Gunlock, Mano, and Ocie series. Gatewood soils are on steeper slopes and have a very-fine particle size class. Gunlock soils are very deep and are on broad, convex ridgetops. Ocie and Mano soils are deeper to the dolostone and are on steeper slopes.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is low to medium. Permeability is moderately slow, and the saturated hydraulic conductivity is moderately high. A perched water table is at a depth of 1 to 2 feet in winter or early spring in most years.
USE AND VEGETATION: This soil is used mainly for hay and pasture. A few areas are used for timber. Native vegetation is mixed hardwoods.
DISTRIBUTION AND EXTENT: The Ozarks region (MLRA 116A) of south-central Missouri. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Texas County, Missouri soil survey, 2002.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of 7 inches. (Ap horizon)
Argillic horizon - the zone from 7 to 25 inches. (Bt horizons)
Lithic contact - at 25 inches.
Aquic feature - redoximorphic conditions at 10 to 20 inches.
ADDITIONAL DATA: University of Missouri Soil Characterization Lab Sample Number M9021552 (01-05)
This soil is being mapped in the Jefferson City dolomite formation in Missouri.