LOCATION HOGCREEK MOEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, active, mesic Typic Fragiudults
TYPICAL PEDON: Hogcreek silt loam - on a north facing convex ridgetop of 3 percent slope in a fescue and red clover pasture at an elevation of 1,150 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 4 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown (10YR 4/2) dry; moderate medium granular structure; very friable; many fine roots; many very fine irregular pores; 5 percent chert gravel; slightly acid (pH 6.4); abrupt smooth boundary. (3 to 6 inches thick)
Bt1--4 to 9 inches; yellowish brown (10YR 5/4) silt loam; weak fine subangular blocky structure; friable; common fine and few medium roots; common fine irregular and few fine tubular pores; common faint clay films on faces of peds; common distinct pale brown (10YR 6/3) clay depletions on surfaces of peds; 7 percent chert gravel; slightly acid (pH 6.2); clear smooth boundary.
Bt2--9 to 19 inches; strong brown (7.5YR 5/6) silt loam; moderate fine subangular blocky structure; friable; few fine roots; many fine tubular pores; common faint clay films on faces of peds; 10 percent chert gravel; strongly acid (pH 5.3); clear smooth boundary.
Bt3--19 to 27 inches; yellowish brown (10YR 5/6) silt loam; moderate fine subangular blocky structure; friable; few fine roots; many very fine tubular pores; common faint clay films on faces of peds; few fine distinct yellowish brown (10YR 5/4) masses of iron accumulation; 7 percent chert gravel; very strongly acid (pH 5.0); clear smooth boundary.
Bt4--27 to 32 inches; light brownish gray (10YR 6/2) gravelly silt loam; moderate medium angular blocky structure; friable; few fine roots; common very fine tubular and few medium vesicular pores; common distinct clay films on faces of peds and in pores; common medium distinct yellowish brown (10YR 5/4) masses of iron accumulation; 30 percent gravel; very strongly acid (pH 4.8); clear wavy boundary. (combined thickness of the Bt horizon is 13 to 28 inches)
2Btx--32 to 39 inches; light brownish gray (10YR 6/2) and brown (10YR 5/3) extremely gravelly silt loam; weak very coarse prismatic structure parting to strong medium angular blocky; very firm; common medium tubular and few medium vesicular pores; common prominent clay films on faces of peds; 70 percent gravel; about 75 percent brittleness; very strongly acid (pH 4.9); abrupt wavy boundary. (7 to 14 inches thick)
3R--39 inches; chert bedrock from the Roubidoux formation.
TYPE LOCATION: Texas County, Missouri; about 1 mile northwest of Slabtown; 500 feet south and 2,050 feet east of the NW corner of section 16, T. 33 N., R. 10 W; Slabtown Spring, Missouri USGS quadrangle; latitude 37 degrees 34 minutes 21 seconds N. and longitude 92 degrees 02 minutes 25 seconds W.
RANGE IN CHARACTERISTICS:
Depth to bedrock: 20 to 40 inches
Depth to fragipan: 14 to 32 inches
A and AE horizons
Hue: 10YR
Value: 3 to 5
Chroma: 2 to 4
Fine earth: silt loam
Rock fragments: 0 to 35 percent gravel
Reaction: slightly acid to very strongly acid
Bt and BE horizons
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 2 to 8
(lower chroma colors are in the horizon immediately above the fragipan)
Fine earth: silt loam, silty clay loam, loam
Rock fragments: 5 to 35 percent gravel
Reaction: strongly acid or very strongly acid
2Btx horizon
Hue: 10YR
Value: 5 or 6
Chroma: 2 to 6
Fine earth: silt loam, loam, silty clay loam, clay loam
Rock fragments: 10 to 80 percent gravel
Reaction: very strongly acid or extremely acid
3R horizon chert, sandstone, or orthoquartzose.
COMPETING SERIES: These are the Laidig and Yelton series. These soils do not have a lithic contact within 40 inches.
GEOGRAPHIC SETTING: Hogcreek soils are on gently to moderately sloping ridgetops. These soils formed in hillslope sediments mixed with a component of loess and in the underlying colluvium. 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 Bendavis, Bender, Poynor, and Viburnum soils. Bendavis and Bender soils have more rock fragments in the profile and are on shoulder slopes. Poynor and Viburnum soils are very deep and are on similar positions.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is medium to very high. Permeability is moderate above the fragipan and slow in the fragipan. The saturated hydraulic conductivity is moderately high above the fragipan, and low in the fragipan. A zone of water saturation is from 1.5 to 2.5 feet (immediately above the fragipan) for brief periods in most years.
USE AND VEGETATION: This soil is used mainly for hay and pasture. Native vegetation is mixed hardwoods and shortleaf pine.
DISTRIBUTION AND EXTENT: The Ozark Highland region (MLRA 116A) of south central Missouri. The series is of moderate 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 4 inches. (Ap horizon)
Argillic horizon - the zone from 4 to 32 inches (Bt horizons)
Fragipan - the zone from 32 to 39 inches.
Lithic contact - at 39 inches.
Zone where aquic conditions occur - 27 to 39 inches.
ADDITIONAL DATA: University of Missouri Soil Characterization Lab Sample Number M9021548
This soil is being mapped in the Roubidoux formation and on the Swan Creek member of the Jefferson City formation in Missouri.