LOCATION RAINSBORO OH+PAEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Oxyaquic Fragiudalfs
TYPICAL PEDON: Rainsboro silt loam, on a nearly level, convex, 1 percent slope,
in a cultivated field at an elevation of about 680 feet above msl. (Colors are
for moist soil unless otherwise stated.)
Ap--0 to 10 inches; brown (10YR 4/3) silt loam, very pale brown (10YR 7/3) dry; moderate fine granular structure parting to moderate fine platy; friable; common
medium roots; strongly acid; abrupt smooth boundary. (4 to 12 inches thick)
BE--10 to 16 inches; yellowish brown (10YR 5/6) silt loam; moderate fine subangular blocky structure; friable; few fine roots; few medium prominent strong brown (7.5YR 4/6) masses of iron accumulation on faces of peds; common distinct dark yellowish brown (10YR 4/4) coatings on faces of peds; moderately acid; clear smooth boundary.
Bt1--16 to 23 inches; yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure; friable; few fine roots; many distinct dark yellowish brown (10YR 4/4) clay films on faces of peds; slightly acid; gradual smooth boundary.
Bt2--23 to 29 inches; yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure; friable; many distinct dark yellowish brown (10YR 4/4) clay films on faces of peds; common fine faint yellowish brown (10YR 5/4) clay depletions on faces of peds; few fine prominent black (10YR 2/1) masses of manganese oxide accumulation in the matrix; strongly acid; clear smooth boundary.
Bt3--29 to 36 inches; yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure parting to moderate medium platy; friable; few fine roots; many distinct dark yellowish brown (10YR 4/6) clay films on faces of peds; many distinct brown (10YR 5/3) clay depletions on faces of peds; few medium prominent black (10YR 2/1) manganese concretions throughout; very strongly acid; abrupt smooth boundary. (Combined thickness of the Bt horizon is 4 to 21 inches.)
2Btx1--36 to 41 inches; dark yellowish brown (10YR 4/4) loam; weak very coarse prismatic structure parting to weak medium subangular blocky; firm; brittle; few very fine roots along prism faces; common distinct yellowish brown (10YR 5/4) clay films on faces of peds and common prominent gray (10YR 5/1) clay films on faces of prisms; common medium prominent grayish brown (10YR 5/2) iron depletions on prism faces; common medium prominent strong brown (7.5YR 4/6)
masses of iron and manganese oxide accumulation in rinds along depletions; few medium prominent black (10YR 2/1) masses of manganese oxide accumulation on faces of peds; 2 percent gravel; very strongly acid; clear smooth boundary.
2Btx2--41 to 50 inches; dark yellowish brown (10YR 4/4) loam; moderate very coarse prismatic structure; very firm; brittle; few distinct dark yellowish brown (10YR 4/6) and common prominent gray (10YR 5/1) clay films on faces of prisms; few medium prominent grayish brown (10YR 5/2) and light brownish gray (10YR 6/2) iron depletions on prism faces; common medium prominent distinct strong brown (7.5YR 5/8) masses of iron and manganese oxide accumulation in
rinds along depletions; common medium prominent black (10YR 2/1) masses of manganese oxide accumulation on faces of peds; 2 percent gravel; very strongly acid; gradual smooth boundary.
2Btx3--50 to 59 inches; yellowish brown (10YR 5/4) fine sandy loam; weak very coarse prismatic structure parting to weak thin platy; very firm; brittle; few distinct yellowish brown (10YR 5/6) clay films on horizontal ped faces and few prominent gray (10YR 5/1) clay films on faces of prisms; few medium prominent grayish brown (10YR 5/2) iron depletions on prism faces; few medium prominent strong brown (7.5YR 5/8) masses of iron and manganese oxide accumulation in rinds along depletions; common medium prominent black (10YR 2/1) masses of manganese oxide accumulation on faces of peds; few fine prominent black (10YR 2/1) manganese concretions throughout; 2 percent gravel; very strongly acid; clear smooth boundary.
2Btx4--59 to 65 inches; yellowish brown (10YR 5/6) fine sandy loam; weak coarse prismatic structure parting to weak medium subangular; firm; brittle; common faint yellowish brown (10YR 5/6) clay films on horizontal ped faces and few prominent gray (10YR 5/1) clay films on faces of prisms; few medium prominent grayish brown (10YR 5/2) iron depletions on prism faces; few medium prominent strong brown (7.5YR 5/8) masses of iron and manganese oxide accumulation in rinds along depletions; common medium prominent black (10YR 2/1) masses of manganese oxide accumulation on faces of peds; few fine prominent black (10YR 2/1) manganese concretions throughout; 2 percent gravel; very strongly acid; clear smooth boundary. (Combined thickness of the 2Btx horizon is 10 to 40 inches thick)
2Bt1--65 to 77 inches; yellowish brown (10YR 5/6) fine sandy loam; weak medium subangular blocky structure parting to weak coarse platy; firm; common distinct strong brown (7.5YR 4/6) clay films on faces of peds; few medium prominent grayish brown (10YR 5/2) iron depletions on prism faces; few medium prominent strong brown (7.5YR 5/8) masses of iron and manganese oxide accumulation in rinds along depletions; common medium prominent black (10YR 2/1) masses of manganese oxide accumulation on faces of peds; few fine prominent black (10YR 2/1) manganese concretions throughout; 2 percent gravel; very strongly acid; clear smooth boundary.
2Bt2--77 to 80 inches; yellowish brown (10YR 5/6) loam; moderate medium subangular blocky structure parting to weak coarse platy; friable; common distinct dark yellowish brown (10YR 4/6) clay films on faces of peds; few medium prominent strong brown (7.5YR 5/8) masses of iron and manganese oxide
accumulation throughout; few medium prominent black (10YR 2/1) manganese concretions throughout; 5 percent gravel; very strongly acid. (Combined thickness of the 2Bt horizon is 8 to 30 inches)
TYPE LOCATION: Ross County, Ohio; about .3 miles southeast of Londonderry, in
Liberty Township, about 2610 feet west and 770 feet south of the northeast
corner of sec. 14, T. 8 N., R. 20 W. USGS Londonderry, OH topographic
quadrangle, lat: 39 degrees 15 minutes 57 seconds N., and long: 82 degrees 47
minutes 12 seconds W., NAD 27.
RANGE IN CHARACTERISTICS: Depth to the base of the argillic horizon is more than
80 inches. Thickness of the loess mantle is 18 to 40 inches. Depth to the top
of the fragipan is 12 to 41 inches. Gravel content ranges from 0 to 2 percent
in the Ap, BE, and Bt horizons; 1 to 35 percent in 2Btx and 2Bt horizons.
Reaction ranges from very strongly acid to slightly acid throughout. Base
saturation is between 35 and 60 percent at a depth of 50 inches below the top of
the argillic horizon.
The Ap horizon has hue of 10YR, value of 4 or 5 (6 or more dry), and chroma of 2
to 4. Some pedons have an A horizon 1 to 5 inches thick that has value of 2 to
4, and chroma of 1 or 2. Texture is silt loam with 12 to 24 percent clay and
less than 20 percent sand.
The BE horizon where present, has hue of 10YR or 7.5YR, value of 4 or 5, and
chroma of 3 to 6. Texture is silt loam or silty clay loam. Clay content ranges
from 15 to 35 percent and averages between 18 and 32 percent. Sand content
averages from 5 to 15 percent.
The Bt horizons have hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 3 to
6. Texture is silt loam or silty clay loam. Clay content ranges from 15 to 35
percent and averages between 18 and 32 percent. Sand content averages from 5 to
15 percent.
The Btx and 2Btx horizons have hue of 10YR or 7.5YR, value of 4 to 6, and chroma
of 3 to 8. The Btx horizon is silt loam or silty clay loam; and the 2Btx
horizon dominantly is loam, clay loam, sandy clay loam, sandy loam, in the fine
earth fraction, but the range includes strata of silt loam. Clay content ranges
from 9 to 38 percent and averages between 15 to 30 percent. Sand content ranges
from 20 to 60 percent.
The 2Bt horizons have hue of 10YR, 7.5YR or 5YR, value of 4 or 5, and chroma of
3 to 6. Texture is loam, clay loam, sandy loam, and sandy clay loam in the fine
earth fraction. Clay content ranges from 15 to 30 percent. Sand content ranges
from 25 to 60 percent. They can be stratified.
COMPETING SERIES: This is the
Ava series. Ava soils contain less than 5 percent
sand in the series control section.
GEOGRAPHIC SETTING: Rainsboro soils formed in loess and the underlying weathered
Illinoian outwash deposits on risers and treads on high stream terraces in areas
of Illinoian glaciation or in areas which have valleys that have carried
Illinoian outwash. Slope gradients range from 0 to 15 percent. Climate is
humid and temperate. Mean annual precipitation ranges from 37 to 43 inches, and
mean annual temperature ranges from 49 to 55 degrees F. Frost free days range
from 145 to 181 days, and elevation ranges from 600 feet to 940 feet above sea
level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Alford,
Libre,
Negley,
Parke,
Pike,
Taggart, and
Teegarden (T) soils. The well drained Alford, Parke and Pike
do not have a fragipan and are on similar landforms. Moderately well drained
Libre soils do not have a fragipan and are on similar landforms. The well
drained Negley soils and are on steeper terrace risers. Taggart and Teegarden
(T) soils are somewhat poorly drained and are in depressions.
DRAINAGE AND PERMEABILITY: Moderately well drained. The potential for surface
runoff is negligible to high. Permeability is moderate or moderately slow in
the loess, moderately slow or slow in the fragipan, and moderate or moderately
rapid in the underlying material. Depth to the top of a perched seasonal high
water table is at 2.0 to 3.5 feet from January through April in most years.
USE AND VEGETATION: More than half of the Rainsboro soils are used for
cultivated crops. Corn, soybeans, wheat, and mixed hay are the principal
crops. A few areas are in pasture or woodland. Native vegetation was mixed,
deciduous hardwood forest.
DISTRIBUTION AND EXTENT: Southern and eastern Ohio and western Pennsylvania.
The series is of moderate extent. MLRA's 114, 124, 126, and 139.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Ross County, Ohio, 1965.
REMARKS: This pedon has been moved to the Londonderry area of the Illinoian
outwash deposits in Ross County.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - from a depth of 0 to 10 inches. (Ap horizon)
Argillic horizon - from a depth of 16 to 80 inches. (Bt1, Bt2, Bt3, 2Btx1,
2Btx2, 2Btx3, 2Btx4, 2Bt1, 2Bt2 horizons)
Fragipan - from a depth of 36 to 65 inches. (2Btx1, 2Btx2, 2Btx3, 2Btx4
horizons)
ADDITIONAL DATA: Characterization data are available for RO-97, the typical
pedon, CO-133, HO-18, RO-22, RO-32, and RO-35 from the Soil Characterization
Laboratory at the Ohio State University, Columbus, OH.