LOCATION LACONIA INEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Typic Endoaqualfs
TYPICAL PEDON: Laconia silt loam on a nearly level concave slope in a cultivated field at an elevation of about 220 meters (720 feet).(Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; dark gray (10YR 4/1) silt loam, gray (10YR 6/1) dry; weak medium platy structure parting to moderate medium granular; friable; common very fine and fine roots between peds; few fine prominent strong brown (7.5YR 5/6) masses of iron accumulation in the matrix; slightly acid; abrupt smooth boundary. (6 to 11 inches thick)
Btg1--7 to 13 inches; gray (10YR 5/1) silt loam; moderate medium subangular blocky structure; friable; few very fine roots between peds; few distinct dark gray (10YR 4/1) clay films on surfaces of peds; many medium prominent yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; neutral; gradual smooth boundary.
Btg2--13 to 25 inches; gray (10YR 5/1) silty clay loam; weak medium prismatic structure parting to moderate medium subangular blocky; firm; many distinct dark gray (10YR 4/1) clay films on surfaces of peds; many medium prominent strong brown (7.5YR 5/8) masses of iron accumulation in the matrix; slightly acid; clear smooth boundary. (Combined thickness of the Btg horizon is 14 to 30 inches.)
2Btgb1--25 to 38 inches; gray (10YR 5/1) silty clay loam; moderate medium prismatic structure parting to moderate medium angular blocky; firm; many distinct dark gray (10YR 4/1) clay films on surfaces of peds; many medium prominent yellowish brown (10YR 5/6) masses of iron accumulation in the matrix; very strongly acid; gradual wavy boundary.
2Btgb2--38 to 59 inches; dark gray (10YR 4/1) silty clay; moderate medium prismatic structure parting to moderate medium angular blocky; firm; many prominent dark gray (N 4/0) clay films on surfaces of peds; many medium prominent strong brown (7.5YR 5/6) and distinct dark yellowish brown (10YR 4/4) masses of iron accumulation in the matrix; strongly acid; clear smooth boundary.
2Btgb3--59 to 74 inches; dark gray (N 4/0) clay; moderate medium prismatic structure parting to moderate medium angular blocky; firm; many distinct dark gray (10YR 4/1) clay films on faces of peds; many coarse prominent strong brown (7.5YR 5/6) and light olive brown (2.5Y 5/4) masses of iron accumulation in the matrix; slightly alkaline; clear wavy boundary. (Combined thickness of the 2Btgb horizon is 40 to 60 inches.)
2Btb--74 to 80 inches; brownish yellow (10YR 6/8) silty clay; moderate medium angular blocky structure; firm; common prominent gray (10YR 6/1) clay films in root channels and in pores; many coarse prominent light gray (10YR 7/1) iron depletions in the matrix; slightly alkaline. (0 to more than 20 inches thick)
TYPE LOCATION: Orange County, Indiana, 1851 feet southwest of Leipsic; 4.3 miles east of Orleans, 6.24 miles northwest of Campbellsburg; USGS Quad Campbellsburg Indiana. ( Latitude:. 38 degrees 40 minutes 3 seconds N. and Longitude: 86 degrees 22 minutes and 27 seconds W.), NAD 27, UTM Zone 16, 554524.6 easting and 4280046.8 northing, NAD83.
RANGE IN CHARACTERISTICS:
Ap horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 1 to 3
Texture: silt loam
Reaction: very strongly acid or strongly acid in non limed areas and ranges to neutral in limed areas
Btg horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 1 or 2 with redoximorphic accumulations
Texture: silt loam or silty clay loam
Reaction: very strongly acid or strongly acid in non limed areas and ranges to neutral in limed areas
2Btgb horizon:
Hue: 10YR, 2.5Y or N
Value: 4 to 6
Chroma: 0 to 2 with redoximorphic accumulations
Texture: commonly silty clay or clay, and the range includes silty clay loam
Reaction: very strongly acid or strongly acid in the upper part and ranges to slightly alkaline in the lower part
2Btb horizon:
Hue: commonly 7.5YR or 10YR, and less commonly 5YR
Value: 4 to 6
Chroma: 4 to 8 with redoximorphic depletions
Texture: commonly silty clay, clay and the range includes silty clay loam
Reaction: commonly slightly acid to slightly alkaline, and less commonly ranges to strongly acid
Rock fragment content: 0 to 5 percent chert gravel
COMPETING SERIES: These are the Ginat and Sunken series. The Ginat soils have have no appreciable differences from this series other than a lower calcium carbonate equivalent below 2 meters. Sunken soils have an organic surface layer 2 to 8 inches thick and formed in slack water tidal coastal plain alluvium.
GEOGRAPHIC SETTING: Laconia soils are in depressions within karst landscapes. They formed in 20 to 40 inches of silty alluvium derived from loess and the underlying local fine-textured lacustrine sediments. Slopes range from 0 to 1 percent. Near the type location the mean annual temperature is 53.2 degrees F and the mean annual precipitation is 47.9 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bedford, Bromer, and Crider soils, all of which are on higher positions. The moderately well drained, very deep, Bedford soils have a fragipan in the subsoil. The somewhat poorly drained, very deep, Bromer soils have fragic soil properties. The well drained, very deep, Crider soils do not have redox depletions in the solum.
DRAINAGE AND PERMEABILITY: Poorly drained. The potential for surface water runoff is negligible to ponded in some areas. Saturated hydraulic conductivity is moderately high or high in the upper part of the solum and moderately low to moderately high in the lower part. Permeability is moderate in the upper part of the solum and slow in the lower part. In drained areas, an apparent water table ranges from 0.5 feet above the soil surface to 1.0 feet below the surface from December through April in most years.
USE AND VEGETATION: Most areas are used for growing corn, soybeans, and small grains. Some areas are used for pasture. Native vegetation was mixed hardwoods of oak, hickory, and maple.
DISTRIBUTION AND EXTENT: South-central Indiana. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Harrison County, Indiana, 2005
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon0 to 7 inches (Ap horizon)
Argillic horizon--7 to 80 inches (Btg2, 2Btgb1, 2Btgb2, 2Btgb3, 2Btb horizons)
Redoximorphic features--7 to 88 inches (iron depletions and iron accumulations).
This soil is correlated as Peoga silt loam, clayey substratum in the 1984 Orange and 1988 Washington County Soil Surveys. It is included with the Bartle soils in the 1975 Harrison County Soil Survey.
ADDITIONAL DATA: Lab data available for this soil is available from the National Soil Survey Lab (S78IN-117-015), and Purdue University (S78117-2) and (S80175-15).