LOCATION CHILLICOTHE MO+KSEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Oxyaquic Vertic Argiudolls
TYPICAL PEDON: Chillicothe silty clay loam, on a 6 percent slope, in pasture, at an elevation of 271 meters (890 feet). (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 centimeters; dark brown (10YR 3/3) silty clay loam, grayish brown (10YR 5/2) dry; moderate fine subangular blocky structure parting to moderate fine granular; friable; many very fine roots; moderately acid; abrupt smooth boundary.
A--8 to 25 centimeters; dark brown (10YR 3/3) silty clay loam, grayish brown (10YR 5/2) dry; moderate fine subangular blocky structure; friable; many very fine roots; slightly acid; clear smooth boundary. (Combined thickness of the A horizon is 20 to 46 centimeters)
Bt1--25 to 48 centimeters; dark yellowish brown (10YR 4/4) silty clay; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; common very fine roots; many distinct clay films on faces of peds; few soft dark accumulations (oxides); moderately acid; clear smooth boundary.
Bt2--48 to 74 centimeters; brown (10YR 4/3) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; common very fine roots; many distinct clay films on faces of peds; few fine faint light brownish gray (10YR 6/2) iron depletions throughout; few fine dark concretions (oxides); strongly acid; clear smooth boundary.
Bt3--74 to 127 centimeters; brown (10YR 5/3) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; common very fine roots; common distinct clay films on faces of peds; common medium faint light gray (10YR 7/2) iron depletions throughout; common fine soft dark accumulations (oxides); strongly acid; clear smooth boundary. (Combined thickness of the Bt horizon is 76 to 152 centimeters)
2BC--127 to 178 centimeters; reddish brown (5YR 4/4) silty clay; weak medium prismatic structure; firm; common clay flows in voids and pores; moderately acid; abrupt wavy boundary.
3R--178 centimeters; limestone.
TYPE LOCATION: Livingston County, Missouri; 2 miles north and 1 mile west of Mooresville; about 526 meters (1725 feet) east and 122 meters (400 feet) south of the northwest corner of Sec. 8, T. 57 N., R. 25 W; USGS Sampsel quadrangle; lat. 39 degrees, 46 minutes 14 seconds N and long 93 degrees 44 minutes 12 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the base of the argillic horizon: 122 to 203 centimeters
Depth to a lithic contact: greater than 152 centimeters
Mollic epipedon ranges from 25 to 50 centimeters in thickness
Particle size control section:
Sand content: less than 10 percent in the particle-size control section
Clay content: 35 to 45 percent
A horizon:
Hue: 10YR or 7.5YR
Value: 2 or 3
Chroma: 2 or 3
Texture: silt loam or silty clay loam
Clay content: 20 to 35 percent
Sand content: 1 to 10 percent
Reaction: moderately acid or slightly acid
Bt horizon:
Hue: 10YR or 7.5YR
Value: 3 to 5
Chroma: 2 to 4
Texture: silty clay loam or silty clay
Clay content: 35 to 45 percent.
Sand content: 1 to 10 percent
Reaction: strongly acid to slightly acid
2Bt horizon (when present) or 2BC horizon:
Hue: 7.5YR or 5YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silty clay or silty clay loam
Clay content: 35 to 60 percent
Sand Content: 1 to 10 percent
Some pedons contain gravel, cobbles and stones.
Reaction: strongly acid to slightly acid.
COMPETING SERIES: These are the
Baileyville,
Cornell, and
Pawnee series.
Baileyville soils have carbonates within depths of 38 to 89 centimeters
Cornell soils have matrix hues of 10YR or 2.5Y in the lower two thirds of the series control section, and have a sand content of 15 to 35 percent in the lower third of the series control section.
Pawnee soils have carbonates within depths of 74 to 137 centimeters, and have a sand content of 35 to 55 percent in the lower third of the series control section.
GEOGRAPHIC SETTING:
Parent Material: Loess or loess and residuum from limestone or shale
Landform: Gently sloping ridgetops and upper side slopes of hills
Slopes: 4 to 7 percent, but have an extreme range from 2 to 14 percent
Mean annual temperature: 8 to 12 degrees C (47 to 54 degrees F)
Mean annual precipitation: 86 to 99 centimeters
GEOGRAPHICALLY ASSOCIATED SOILS: These include the
Grundy,
Lagonda and
Sampsel soils.
These soils have gray iron depletions at shallower depths.
Grundy and Lagonda soils are on similar positions.
Sampsel soils commonly are on lower slopes.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: Moderately well drained
Runoff: medium
Saturated hydraulic conductivity: moderately low
Seasonal episaturation: In undisturbed areas, an upper limit of .6 to 1.5 meters (2.0 to 3.5 feet) during November to May in most years.
USE AND VEGETATION: Soils are used to grow corn, soybeans, and wheat. Some areas are used for hay and pasture with the remainder in woodland. Native vegetation is tall prairie grasses.
DISTRIBUTION AND EXTENT: West-central and northwest Missouri and North-east Kansas; moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Livingston County, Missouri, 1996. The name is from the county seat.
REMARKS: Diagnostic horizons and features recognized in this pedon: mollic epipedon - the zone from the surface to a depth of 25 centimeters (Ap and A horizons); argillic horizon - the zone from approximately 25 to 127 centimeters (Bt1, Bt2, and Bt3 horizons); udic moisture regime.
JCR 6/03/2008 Changed the range of the clay content in the particle size control section to 45 from 42. Changed the 2Bt or 2BC horizon clay content from a high of 50 to a high of 60 based on recent NSSl data. Added gravels, cobbles and stones to the 2Bt horizon. The addition of the gravels, cobbles and stones reflects what is commonly present above the R horizon.
09/2008 GJJ added some metric conversions, removed English units, and some format changes.
ADDITIONAL DATA: Missouri Characterization Laboratory Number M9411719. NSSl S04MO-037-001