LOCATION TRIPLETT MOEstablished Series
TAXONOMIC CLASS: Fine, smectitic, mesic Vertic Argialbolls
TYPICAL PEDON: Triplett silt loam - on a 1 percent slope in a cultivated field at an elevation of 665 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown (10YR 4/2) dry; weak very fine platy structure parting to weak very fine granular; very friable; common fine roots; neutral; abrupt smooth boundary. (6 to 14 inches thick)
E--7 to 14 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/1) dry; weak thin platy structure parting to very fine granular; very friable; common fine roots; common fine faint dark grayish brown (10YR 4/2) iron depletions and brown (10YR 4/3) masses of iron accumulation in ped interiors; few fine iron stains; strongly acid; abrupt smooth boundary. (5 to 11 inches thick)
Bt--14 to 33 inches; very dark gray (10YR 3/1) silty clay, gray (10YR 5/1) dry; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; common fine roots; common faint clay films on faces of peds; common very dark grayish brown (10YR 3/2) organic coats; common fine iron and manganese stains and concretions; strongly acid; gradual smooth boundary. (6 to 24 inches thick)
Btg1--33 to 53 inches; dark grayish brown (2.5Y 4/2) silty clay loam; weak medium prismatic structure parting to moderate fine subangular blocky; firm; few fine roots; common distinct clay films on faces of peds; common fine prominent light olive brown (2.5Y 5/6) and yellowish brown (10YR 5/6) masses of iron accumulation in ped interiors; common fine iron and manganese stains and concretions; common black organic stains on faces of peds; strongly acid; clear smooth boundary. (6 to 24 inches thick)
2Btg2--53 to 65 inches; grayish brown (2.5Y 5/2) silty clay loam; moderate fine subangular blocky structure; few faint clay films on faces of peds; friable; common fine distinct light olive brown (2.5Y 5/4) masses of iron accumulation in ped interiors; many medium iron and manganese stains and concretions; 11 percent sand; moderately acid;
TYPE LOCATION: Chariton County, Missouri; 2 miles west of Prairie Hill; 225 feet south and 100 feet east of the northwest corner of sec. 1, T. 54 N., R. 17 W.; USGS Bynumville quadrangle; UTM coordinates 519430m east and 4374155m north.
RANGE IN CHARACTERISTICS: The particle size control section averages 42 to 52 percent clay. Depth to the 2Btg or 2C horizon is 40 to 60 inches.
The A or Ap horizon has color value of 2 or 3 moist, 4 or 5 dry, and chroma of 1 or 2. It is silt loam or silty clay loam. Reaction is strongly acid to neutral.
The E horizon has color value of 4 to 6 and chroma of 1 or 2. It is silt loam or silty clay loam. Reaction is very strongly acid to neutral.
The Bt horizon has hue of 2.5Y or 10YR, value of 2 or 3, 4 or 5 dry and chroma of 1 or 2. It is silty clay or clay. Reaction is very strongly acid to slightly acid.
The Btg horizon has hue of 10YR to 5Y, value of 4 or 5 in the upper part and 5 to 7 in the lower part and chroma of 1 or 2. Mottles have hue of 7.5YR to 2.5Y, value of 3 to 5 and chroma of 4 to 8. It is silty clay or silty clay loam. Reaction is very strongly acid to slightly acid.
The 2Btg horizon has color similar to the Btg horizon. It is silty clay loam or silt loam with more than 10 percent sand. Reaction is strongly acid to slightly acid.
COMPETING SERIES: These are the Barbert, Chauncey, Crestmeade, Edina, Fillmore, Massie, Plankinton, Rolfe, Scott, and Sperry series. A similar soil is the Chariton series. Barbert, Plankinton and Rolfe soils average less than 51 degrees F. at the series temperature control depth. Chauncey soils have an E horizon thicker than 11 inches. Crestmeade and Edina soils contain less than 10 percent sand in the lower part of the solum. Fillmore soils are not dry in any part of the soil moisture control section during the 120 days following the summer solstice and commonly have free carbonates at depths of less than 60 inches. Massie soils are not dry in any part of the soil moisture control section during the 120 days following the summer solstice Scott soils are not dry in any part of the soil moisture control section for more than 10 days during the 120 days following the summer solstice. Sperry soils average less than 54 degrees F. at the series temperature control depth. Chariton soils have value of 4 or more in the upper part of the Bt horizon.
GEOGRAPHIC SETTING: The Triplett soils are on nearly level and gently sloping stream terraces with concave slopes. Slopes range from 0 to 3 percent. The soils formed in loess or loess and the underlying silty alluvium. The mean annual temperature ranges from 53 to 56 degrees F, and mean annual precipitation ranges from 32 to 38 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: Triplett soils are commonly associated with the Tina, Wiota, Shannondale and Gifford soils. Tina, Wiota, and Shannondale soils do not have albic E horizons and Wiota and Shannondale soils have a fine-silty control section. They occur on similar positions as the Triplett soils. Gifford soils do not have a mollic epipedon and are on flood plain escarpments below the Triplett soils.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is slow. Permeability is slow. These soils are subject to none or rare flooding. A perched water table has an upper limit of 0.5 to 1.5 feet during November to April in most years.
USE AND VEGETATION: Most areas are cropped to corn, hay, small grain, and soybeans. Native vegetation is prairie grasses.
DISTRIBUTION AND EXTENT: North central Missouri. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Chariton County, Missouri, 1993.
REMARKS: Diagnostic features and horizons recognized in this series are: mollic epipedon - the zone from the surface of the soil to a depth of 7 inches and from approximately 14 inches to 33 inches (Ap and Bt horizons); albic horizon - the zone from approximately 7 to 14 inches (E horizon); argillic horizon - the zone from approximately 14 inches to 65 inches or more (Bt, Btg1 and 2Btg2 horizons).