LOCATION BAYLOCK MO

Established Series
KWG-JDC
11/2014

BAYLOCK SERIES

The Baylock series consists of very deep, poorly drained soils that formed in loess or silty alluvium over silty and loamy alluvium. The Baylock soils are on stream terraces. Slopes range from 0 to 3 percent. Mean annual temperature is 15 degrees C, and the mean annual precipitation is 1055 mm.

TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Typic Endoaqualfs

TYPICAL PEDON: Baylock silt loam on a linear slope of 1 percent, in a pastured field, at an elevation of 161 meters. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 10 cm; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2), dry; moderate very fine granular structure; friable; many very fine and fine roots; 3 percent chert gravel; neutral (pH 6.7); clear smooth boundary.

Eg1--10 to 30 cm; gray (10YR 5/1) silt loam; weak medium platy parting to moderate fine granular structure; friable; many very fine and fine roots; few coarse black (10YR 2/1) iron-manganese concretions; 5 percent chert gravel; neutral (pH 6.8); clear smooth boundary.

Eg2--30 to 43 cm; gray (10YR 5/1) silt loam; weak fine subangular blocky structure; friable; many very fine and fine roots; common medium black (10YR 2/1) iron-manganese concretions; neutral (pH 6.9); clear smooth boundary.

Eg3--43 to 66 cm; light brownish gray (10YR 6/2) silt loam; weak fine subangular blocky structure; friable; few very fine and fine roots; few fine strong brown (7.5YR 5/6) masses of oxidized iron and common fine black (10YR 2/1) iron-manganese masses; neutral (pH 6.9); clear smooth boundary.

Btg1--66 to 91 cm; 50 percent gray (10YR 6/1) and 25 percent gray (10YR 5/1) and 25 percent yellowish brown (10YR 5/4) silt loam; weak fine subangular blocky structure; friable; few very fine to medium roots; common faint clay films; many medium black (10YR 2/1) iron-manganese masses; neutral (pH 6.8); clear smooth boundary.

Btg2--91 to 119 cm; 70 percent gray (10YR 6/1) and 20 percent light yellowish brown (10YR 6/4) and 10 percent light brownish gray (10YR 6/2) silt loam; moderate very fine subangular blocky structure; friable; few very fine roots; many faint clay films; few black (10YR 2/1) iron-manganese masses; neutral (pH 6.7); abrupt smooth boundary.

Btg3--119 to 147 cm; 90 percent gray (10YR 5/1) and 5 percent light yellowish brown (10YR 6/4) and 5 percent yellowish brown (10YR 5/4) silt loam; weak very fine subangular blocky structure; friable; many faint clay films; 2 percent chert gravel; neutral (pH 6.6); clear smooth boundary.

Cg1--147 to 173 cm; 40 percent gray (10YR 6/1) and 35 percent yellowish brown (10YR 5/4) and 15 percent dark yellowish brown (10YR 4/4) and 10 percent gray (10YR 5/1) silt loam; massive; firm; 1 percent chert gravel; neutral (pH 6.8); gradual wavy boundary.

Cg2--173 to 203 cm; 40 percent olive brown (2.5Y 4/4) and 30 percent light olive brown (2.5Y 5/4) and 30 percent light brownish gray (10YR 6/2) silt loam; massive; firm; neutral (pH 6.8).

TYPE LOCATION: Madison County, Missouri; located 150 ft. south and 1,950 feet west of the northeast corner of section 10, T. 31 N., R. 8 E.; USGS Marquand Topographic Quadrangle; lat. 37 degrees 23 minutes 14 seconds N. and long. 90 degrees 9 minutes 6 seconds W., NAD 83; UTM Zone 15, 752,170 meters easting, 4,141,637 meters northing, NAD 83.

RANGE IN CHARACTERISTICS:
Depth to the top of the argillic horizon is 36 to 66 cm.
Clay content of the particle-size control section (weighted average)--18 to 31 percent.
Reaction ranges from very strongly to moderately acid where fields have not been limed and from slightly acid to slightly alkaline where limed.
Rock fragments--(pebbles) range from 0 to 5 percent in all horizons.

Ap horizon:
Hue--10YR or 2.5Y
Value--3 to 7
Chroma--1 to 2, oxide segregated colors in the matrix can be as high as 7
Texture--silt loam
Reaction--4.7 to 7.2
Thickness--10 to 25 cm

E horizon:
Hue--10YR or 2.5Y
Value--4 to 8
Chroma--1 to 2, oxide segregated colors in the matrix can be as high as 6
Texture--silt loam
Reaction--4.9 to 6.9
Thickness--0 to 51 cm

Btg horizon:
Hue--7.5YR to 2.5Y
Value--4 to 7
Chroma--1 to 2, oxide segregated colors in the matrix can be as high as 8
Texture--silt loam or silty clay loam
Reaction--4.7 to 7.8
Thickness-81 to 152 cm or more

Cg or BCg horizon where present:
Hue--10YR or 2.5Y
Value--4 to 6
Chroma--1 to 2, oxide segregated colors in the matrix can be as high as 4
Texture--silt loam, loam, or sandy clay loam
Reaction--6.6 to 7.2
Thickness--0 to 60 cm

COMPETING SERIES: These are the Ginat, Laconia, and Sunken series. The Ginat soils have a shallower argillic horizon and they formed in silty alluvium in the Ohio River drainage basin. Laconia soils have a 2Btg horizon with a higher content of clay and occur in depressions on karst landscapes. Sunken soils have a 2Btg horizon with a higher content of sand and formed in loamy eolian or alluvial sediments.

GEOGRAPHIC SETTING: Baylock soils are on treads and in depressions of stream terraces in the southeastern Ozarks. They formed in loess or silty alluvium over silty or loamy alluvium. Slopes range from 0 to 3 percent. Mean annual temperature ranges from 12 to 16 degrees C., and the mean annual precipitation ranges from 965 to 1145 mm. Frost-free days range from 175 to 245.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bearthicket, Cornwall, Jamesfin, Marquand, Tilk soils. Bearthicket and Jamesfin soils are on similar positions and are well drained. Cornwall and Marquand soils are on foot slopes or higher terraces and are moderately well drained. Tilk soils are on flood-plain steps and are loamy-skeletal.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained, low runoff, moderate saturated hydraulic conductivity in the upper part of the solum and moderately slow in the lower part. In undrained areas, an intermittent, apparent high water table is at 0 to 1.0 foot below the surface from December through April in most years.

USE AND VEGETATION: Most areas are used for hay and pasture, and a few areas are in woodland or brushy idle pasture. Native vegetation is mixed deciduous, hardwood forest.

DISTRIBUTION AND EXTENT: Southeastern Ozarks Missouri; MLRA-116A and 116C. The acreage is of moderate extent in Missouri.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia.

SERIES PROPOSED: Madison County, Missouri, 2010.

REMARKS: Diagnostic horizons and features in this pedon include:
Ochric epipedon - from a depth of 0 to 66 cm (Ap, Eg1, Eg2, Eg3 horizons).
Argillic horizon - from a depth of 66 to 200 cm (Btg1, Btg2, Btg3 horizons).
Redoximorphic features - from a depth of 0 to 200 cm (Ap, Eg1, Eg2, Eg3, Btg1, Btg2, Btg3, Cg1, Cg2 horizons).

ADDITIONAL DATA: Missouri Soil Characterization Lab number M9512314. These soils were previously mapped as Racoon taxajunct or Moniteau taxajunct.

National Cooperative Soil Survey
U.S.A.