LOCATION LINEVILLE IA+MOEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aquollic Hapludalfs
TYPICAL PEDON: Lineville silty clay loam, on a convex ridgetop, with a slope of 5 percent, in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 20 centimeters; very dark grayish brown (10YR 3/2) silty clay loam, grayish brown (10YR 5/2) dry; weak fine subangular blocky structure parting to moderate fine granular; friable; common fine roots; common distinct very dark brown (10YR 2/2) organic coats on all faces of peds; slightly acid; abrupt smooth boundary.
BE--20 to 30 centimeters; dark grayish brown (10YR 4/2) silty clay loam, light brownish gray (10YR 6/2) dry; weak fine subangular blocky structure; friable; common fine roots; strongly acid; clear smooth boundary.
Bt1--30 to 41 centimeters; dark yellowish brown (10YR 4/4) silty clay loam; moderate fine subangular blocky structure; friable; common fine roots; common distinct brown (10YR 4/3) clay films on all faces of peds; few prominent light gray (10YR 7/2) dry silt and fine sand coats on faces of peds; strongly acid; clear smooth boundary.
2Bt2--41 to 61 centimeters; dark yellowish brown (10YR 4/4) clay loam; moderate fine subangular blocky structure; friable; few fine roots; common distinct brown (10YR 4/3) clay films on all faces of peds; few prominent light gray (10YR 7/2) dry silt and fine sand coats on faces of peds; many black (10YR 2/1) concretions (oxides); common fine faint yellowish brown (10YR 5/4) and few fine faint dark brown (10YR 3/3) redoximorphic concentrations; few fine distinct dark grayish brown (10YR 4/2) redoximorphic depletions; moderately acid; gradual smooth boundary.
2Btg3--61 to 76 centimeters inches; dark grayish brown (10YR 4/2) and dark yellowish brown (10YR 4/4) loam; moderate medium subangular blocky structure; friable; few fine roots; common distinct brown (10YR 4/3) clay films on all faces of peds; few prominent light gray (10YR 7/2) dry silt and fine sand coats on faces of peds; many black (10YR 2/1) concretions (oxides); common fine prominent yellowish brown (10YR 5/6) and few fine distinct brown (7.5YR 4/4) redoximorphic concentrations; moderately acid; gradual smooth boundary.
2Btg4--76 to 94 centimeters; grayish brown (2.5Y 5/2) and yellowish brown (10YR 5/4) clay loam; weak medium subangular blocky structure; friable; few fine roots; few distinct dark grayish brown (10YR 4/2) clay films on faces of peds; few light gray (10YR 7/2) dry silt and fine sand coats on faces of peds; many black (10YR 2/1) concretions (oxides); common medium prominent strong brown (7.5YR 5/8) and few fine prominent yellowish red (5YR 4/6) redoximorphic concentrations; moderately acid; gradual smooth boundary.
3Bt5--94 to 109 centimeters; brown (7.5YR 4/4) clay loam; weak medium subangular blocky structure; firm; few distinct dark grayish brown (10YR 4/2) clay films on all faces of peds; common medium prominent grayish brown (2.5Y 5/2) redoximorphic depletions; few fine prominent yellowish red (5YR 4/6) redoximorphic concentrations; a pebble band in the upper part of the horizon; moderately acid; clear smooth boundary.
3Bt6--109 to 150 centimeters; strong brown (7.5YR 5/6) and yellowish red (5YR 4/6) clay loam; moderate fine subangular blocky structure; firm; few distinct dark grayish brown (10YR 4/2) clay films on all faces of peds; few black (10YR 2/1) concretions (oxides); common fine distinct red (2.5YR 4/6) redoximorphic concentrations; few fine prominent grayish brown (2.5Y 5/2) redoximorphic depletions; many pebbles; neutral; clear smooth boundary.
3Bt7--150 to 185 centimeters; strong brown (7.5YR 5/6), yellowish brown (10YR 5/4), and grayish brown (2.5Y 5/2) clay loam; moderate fine subangular blocky structure; firm; few distinct dark grayish brown (10YR 4/2) clay films on all faces of peds; common black (10YR 2/1) concretions (oxides); neutral; clear smooth boundary.
3BC--185 to 200 centimeters; yellowish brown (10YR 5/4) and grayish brown (2.5Y 5/2) clay loam; weak medium prismatic structure; firm; common black (10YR 2/1) concretions (oxides); neutral.
TYPE LOCATION: Major Land Resource Area (MLRA) 109-Iowa and Missouri Heavy Till Plain, Wayne County, Iowa subset; about 5 miles east of Corydon; located about 1,270 feet north and 1,430 feet west of the southeast corner of section 24, T. 69 N., R. 21 W.; USGS Confidence topographic quadrangle; lat 40 degrees 45 minutes 24 seconds N. and 93 degrees 13 minutes 1 second W., NAD 83.
RANGE IN CHARACTERISTICS:
Depth to carbonates--greater than 180 centimeters
Clay content in the particle-size control section (weighted average)--20 to 35 percent
Sand content in the particle-size control section (weighted average)--15 to 35 percent
Special feature--a pebble band typically is between the 2Bt and the 3Bt horizons or in the upper part of the 3Bt horizon
Ap or A horizon:
Hue--10YR
Value--2 or 3
Chroma--1 or 2
Texture--silt loam or silty clay loam
Clay content--18 to 30 percent
Sand content--5 to 20 percent
Reaction--moderately acid to neutral
Thickness--15 to 25 centimeters
E horizon (when present):
Hue--10YR
Value--4 or 5
Chroma--2
Texture--silt loam
Clay content--18 to 25 percent
Sand content--5 to 20 percent
Reaction--moderately acid to neutral
Thickness--0 to 15 centimeters
BE horizon (when present):
Hue--10YR
Value--4 or 5
Chroma--2 to 4
Texture--silty clay loam
Clay content--28 to 35 percent
Sand content--5 to 20 percent
Reaction--strongly acid to neutral
Thickness--0 to 15 centimeters
Bt horizon:
Hue--10YR
Value--4 or 5
Chroma--2 to 4
Texture--clay loam or silty clay loam
Clay content--28 to 35 percent
Sand content--10 to 40 percent
Reaction--strongly acid to neutral
Thickness--8 to 30 centimeters
2Bt or 2Btg horizon:
Hue--7.5YR to 2.5Y
Value--4 or 5
Chroma--2 to 6
Texture--loam or clay loam
Clay content--20 to 35 percent
Sand content--25 to 50 percent
Reaction--strongly acid to slightly acid
Thickness--40 to 75 centimeters
3Bt horizon:
Hue--5YR to 2.5Y
Value--4 or 5
Chroma--2 to 6
Texture--silty clay, clay loam, or clay
Clay content--28 to 55 percent
Sand content--15 to 40 percent
Rock fragment content--2 to 10 percent
Reaction--strongly acid to neutral
Thickness--50 to 100 centimeters
3BC or 3C horizon (when present):
Hue--7.5YR to 2.5Y
Value--4 or 5
Chroma--2 to 6
Texture--loam or clay loam
Clay content--20 to 40 percent
Sand content--25 to 45 percent
Rock fragment content--2 to 10 percent
Reaction--moderately acid to neutral
COMPETING SERIES: These are the
Mosel,
Newry, and
Oran series.
Mosel--have carbonates within a depth of 100 centimeters
Newry--have carbonates within a depth of 90 centimeters
Oran--have carbonates within a depth of 100 centimeters
GEOGRAPHIC SETTING:
Parent material--loess and loamy erosional sediments over till
Landform--convex ridges and narrow interfluves on dissected till plains that are slightly lower in elevation than the associated loess-derived soils
Slope--2 to 9 percent
Elevation--200 to 300 meters above sea level
Mean annual air temperature--9 to 12 degrees C
Mean annual precipitation--865 to 1,040 millimeters
Frost-free period--175 to 210 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Armstrong,
Gara,
Kniffin, and
Pershing soils.
Armstrong--are on lower landscape positions and have a clay content that averages 35 to 60 percent in the particle-size control section
Gara--are on lower landscape positions and have a sand content of more than 20 percent in the upper third of the series control section
Kniffin--are on higher landscape positions and have a sand content of less than 5 percent in the series control section
Pershing--are on higher landscape positions and have a sand content of less than 5 percent in the series control section
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained--a frequently saturated zone occurs between depths of 0.3 and 1 meter during the wettest periods of years when precipitation is within one standard deviation of the 30 year mean of annual precipitation, and this saturation is considered perched
Saturated hydraulic conductivity--0.10 to 1.00 micrometers per second
USE AND VEGETATION: Most areas are cultivated. The principal crops are corn, soybeans, oats, hay and pasture. The native vegetation is mixed prairie grasses and deciduous trees.
DISTRIBUTION AND EXTENT:
Physiographic Division--Interior Plains
Physiographic Province--Central Lowland
Physiographic sections--Dissected till plains
MLRA--Iowa and Missouri Heavy Till Plain (109)
LRR M; southern Iowa and northern Missouri
Extent--moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana; MLRA SSO 10-7 (Gallatin, Missouri)
SERIES ESTABLISHED: Appanoose County, Iowa, 1970.
REMARKS:
Particle--size control section--the zone from 30 to 80 centimeters (Bt1, 2Bt2, 2Bt3, and 2Bt4 horizons);
series control section--the zone from the surface to a depth of 185 centimeters.
Diagnostic horizons and features recognized in this pedon include:
ochric epipedon--the zone from the surface to a depth of 30 centimeters (Ap and BE horizons);
argillic horizon--the zone from 30 to 185 centimeters (Bt1, 2Bt2, 2Btg3, 2Btg4, 3Bt5, 3Bt6, and 3Bt7 horizons);
udic moisture regime.
Taxonomy version--Keys to Soil Taxonomy, tenth edition, 2006
The type location was re-sampled and described to a depth of 2 meters for this revision (4/09). The type location is in a moderately eroded map unit.