LOCATION BARDLEY MOEstablished Series
TAXONOMIC CLASS: Very-fine, mixed, active, mesic Typic Hapludalfs
TYPICAL PEDON: Bardley gravelly silt loam, on a 13 percent convex east- facing slope in forest at an elevation of 580 feet. (Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; dark grayish brown (10YR 4/2) gravelly silt loam, light brownish gray (10YR 6/2) dry; moderate very fine granular structure; very friable; many coarse roots; many fine continuous vesicular pores; many worm channels and casts; few fine concretions (oxides); about 35 percent chert gravel; slightly acid; abrupt smooth boundary. (2 to 6 inches thick)
E--4 to 8 inches; brown (10YR 5/3) extremely gravelly silt loam; weak very fine granular structure; many medium roots; many fine, continuous vesicular pores; many worm channels and casts; few fine concretions (oxides); 65 percent chert gravel; slightly acid; clear smooth boundary. (0 to 10 inches thick)
2Bt1--8 to 15 inches; yellowish red (5YR 4/6) clay; strong very fine subangular blocky structure; very firm; many medium roots; many fine continuous vesicular pores; few worm channels and casts; few faint clay films on faces of peds; common fine concretions (oxides); strongly acid; clear smooth boundary.
2Bt2--15 to 23 inches; yellowish red (5YR 5/6) clay; strong very fine subangular blocky structure; very firm; common medium roots; many fine continuous vesicular pores; few worm channels and casts; many faint clay films on faces of peds; common fine concretions (oxides); moderately acid; abrupt wavy boundary.
2Bt3--23 to 27 inches; brown (7.5YR 5/4) clay; many fine distinct strong brown (7.5YR 4/6) lithic chromic mottles; strong very fine subangular blocky structure; very firm; few fine roots; many fine continuous vesicular pores; few worm channels and casts; many faint clay films on faces of peds; common fine concretions (oxides); moderately acid. (Combined thickness of the 2Bt horizons is 9 to 24 inches.)
2R--27 inches; dolostone
TYPE LOCATION: Ripley County, Missouri; 2,310 feet south and 30 feet west of the northeast corner of section 8, T. 22 N., R. 1 W.; USGS Gatewood topographic quadrangle, 36 lat. degrees 34 minutes 24.8 seconds N. and 91 long. degrees 5 minutes 22.3 seconds W., NAD83.
RANGE IN CHARACTERISTICS: Depth to the bedrock ranges from 20 to 40 inches. Gravel or flagstone content of the surface ranges from 15 to 70 percent by volume. Some pedons are stony. Rock fragments are chert or dolostone.
The A horizon has hue of 10YR or 7.5YR, value of 3 to 5, and chroma of 2 to 4. Some pedons have an Ap horizon. It is silt loam or the gravelly, flaggy, very gravelly, extremely gravelly, or extremely cobbly analogues of sandy loam, loam, silt loam, or silty clay loam. Reaction ranges from very strongly acid to neutral.
The E horizon has hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 2 to 4. It is silt loam or the gravelly, flaggy, very gravelly, or extremely gravelly analogues of sandy loam, loam, silt loam, or silty clay loam. Reaction ranges from very strongly acid to neutral.
The 2Bt horizon has hue of 10R to 7.5YR; value of 3 to 5; and chroma of 3 to 8. Just above the lithic contact hues of 7.5YR or yellower are permitted. The texture is silty clay, clay, gravelly silty clay, or gravelly clay. The upper part of the 2Bt horizon ranges from very strongly acid to moderately acid and the lower part of the 2Bt horizon is moderately acid to neutral. Some pedons are slightly alkaline in the layer just above the lithic contact.
Some pedons have a 2BC or 2C horizon that has hue of 2.5YR to 10YR; value of 4 to 6; and chroma of 2 to 6. It ranges from sand to clay loam. Rock fragments are 0 to 35 percent. It is 2 to 10 inches thick and rests on the lithic contact. Reaction is slightly acid to moderately alkaline.
COMPETING SERIES: These are the Carbo, Chilhowie, Endcav, Niangua, and Oshkosh series. Carbo and Chilhowie soils do not have a lithologic discontinuity. Endcav, Niangua and Oshkosh soils do not a lithic contact within 40 inches.
GEOGRAPHIC SETTING: The Bardley soils are on summits, side slopes, back slopes, and nose slopes of hills and ridges. Slopes are 2 to 100 percent. They formed in hillslope sediments and the underlying residuum from dolomite interbedded with some limestone and sandstone. The mean annual temperature ranges from 53 to 58 degrees F, and the mean annual precipitation ranges from 37 to 47 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clarksville, Crider, Doniphan, Gasconade, and Gatewood soils. Clarksville soils are loamy-skeletal and are on similar landscapes. Crider soils are fine-silty and occur above the Bardley soils in the landscape. Doniphan soils do not have a lithic contact within a depth of 40 inches of the surface and occur on similar landscapes. Gasconade soils are less than 20 inches to bedrock and are usually lower in the landscape. Gatewood soils are moderately well drained and are lower in the landscape.
DRAINAGE AND PERMEABILITY: Well drained. Runoff potential is medium to high. Permeability is moderate. The saturated hydraulic conducivity is moderately high.
USE AND VEGETATION: Most of the Bardley soils are forested. Some are cleared and used for pasture. Native vegetation is mixed hardwoods.
DISTRIBUTION AND EXTENT: The Ozark region of Missouri (MLRAs 116A and 116B). The series is of large extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Ripley County, Missouri, 1982.
REMARKS: These soils were first classified as fine, mixed, mesic Typic Hapludalfs but were reclassified based on data available from the University of Missouri and field work in progressive soil surveys. University of Missouri laboratory data lists clay percentages in the 2Bt as 87 and 89 percent.
Diagnostic horizons and features recognized in this series are:
ochric epipedon - the zone from the surface to a depth of 8 inches (A and E horizons);
argillic horizon - the zone from approximately 8 to 27 inches (2Bt1, 2Bt2, and 2Bt3 horizons)