LOCATION JAPANY AREstablished Series
TAXONOMIC CLASS: Fine, mixed, active, thermic Aquic Dystruderts
TYPICAL PEDON: Japany silty clay loam--pasture.
A--0 to 15 cm (0 to 6 in); brown (10YR 4/3) silty clay loam; few fine distinct yellowish brown (10YR 5/8) mottles weak fine and medium subangular blocky structure; few medium iron manganese masses; firm; many fine and medium and common coarse roots; neutral; clear smooth boundary.
Bt1--15 to 30 cm (6 to 12 in); variegated yellowish brown (10YR 5/6) and light yellowish brown (10YR 6/4) silty clay loam; common fine distinct light brownish gray (10YR 6/2) iron depletions; moderate medium subangular blocky structure;fine few iron manganese masses; firm; common fine and medium and few coarse roots; common fine faint discontinuous distinct clay films on faces of peds; about 2 percent by volume sandstone and chert fragments less than 3 inches in diameter; moderately acid; gradual smooth boundary.
Btss1--30 to 56 cm (12 to 22 in); variegated yellowish brown (10YR 5/4) and light brownish gray(10YR 6/2) silty clay; few fine prominent red (2.5YR 4/6) iron accumulations; moderate medium and coarse angular blocky structure; firm; few fine, medium, and coarse roots; many fine distinct continous clay films on faces of peds; about 1 percent by volume sandstone and chert fragments less than 8 cm (3 in) in diameter; few discontinous distinct nonintersecting slickensides on vertical faces of peds; moderately acid; clear smooth boundary.
Btss2--56 to 94 cm (22 to 37 in); variegated gray (10YR 6/1) and strong brown (7.5YR 5/8) silty clay; common fine prominent red (2.5YR 4/8) iron accumulations; strong coarse angular blocky structure; very firm; few medium iron manganese masses; few fine and medium roots; many fine distinct continous clay films on faces of peds; about 2 percent by volume sandstone and chert fragments less than 8 cm (3 in) in diamete in diameter; few disonctious distinct nonintersecting slickensides on vertical faces of peds; slightly acid; clear smooth boundary.
Btss3--94 to 140 cm (37 to 55 in); variegated light brownish gray (10YR 6/2) and yellowish brown (10YR 5/6) clay; common fine distinct gray (10YR 6/1) iron depletions on surfaces along root channels; strong coarse angular blocky structure; very firm; common medium iron manganese concretions; few fine and medium roots; many fine distinct continous clay films on faces of peds; about 2 percent by volume sandstone and chert fragments less than 8 cm (3 in) in diamete in diameter; moderately alkaline; clear wavy boundary.
Bt2--140 to 203 cm (55 to 80 in); gray (2.5Y 5/1) silty clay, many medium prominent strong brown(7.5YR 5/8) iron accumulations; common medium iron manganese masses; strong coarse angular blocky structure; very firm; many distinct continous clay films; 20 percent sandstone and chert fragments less than 8 cm (3 in) in diamete in diameter; 5 percent limestone fragments less than 30 cm (12 in); moderately alkaline.
TYPE LOCATION: Pike County, Arkansas; T8S, R25W, Sec 1, SE1/4 NE1/4 NW1/4 SW1/4; DELIGHT USGS topographic quadrangle, Latitude: 34 degrees, 4 minutes, 51.50 seconds N., Longitude: 93 degrees, 37 minutes, 26.60 seconds W.
RANGE IN CHARACTERISTICS:
Solum thicknes: 30 to more than 60 inches
The acid Bt horizon is irregularly underlain by marl and partially weathered chalk at a depth that varies from 30 to 80 inches or more.
Reaction ranges from very strongly acid to alkaline.
A horizon
Hue: 10YR
Value: 3 to 5
Chroma: 2 or 3
Redoximorphic features: Iron manganese masses and iron accumulations range from none to common
Fine-earth: very fine sandy loam, fine sandy loam, loam, silt loam, silty clay loam, or clay loam.
Btss horizon(s)
Hue: 2.5Y, 5YR, 7.5YR, 10YR, or 2.5Y
Value: 4 to 6
Chroma: 4 to 8
Redoximorphic features: none to many that have chroma of 2 or less, or it is variegated in shades of yellow, brown, gray, and red
In some pedons the lower part of the Bt horizon
Hue of 10YR, 2.5Y, or 5Y
Value of 5 to 7
Chroma of 1 or 2, with redoximorphic features in shades of brown, yellow, and gray and most common on surfaces of peds or slickensides.
Fine-earth: silty clay loam, silty clay, or clay. Iron manganese masses range from none to many.
Rock fragments: 0 to 5 percent, predominantly sandstone gravel.
Bt horizon(s)
Variegated in shades of yellow,red, brown, and gray,
OR
Hue of 5YR, 7.5YR, 10YR, or 2.5Y
Value of 5 or 6
Chroma of 3 to 6
Redoximorphic features in shades of brown, gray and yellow
OR
Dominant matrix color of gray with brown iron accumulations.
Fine-earth: silty clay loam, silty clay, clay loam, or clay.
Roc fragments: sandstone is less than 15 percent, predominantly gravel size. Some horizons have limestone flagstones.
BC and C horizons, where present
Same range in characteristics as the Bt horizon but may be characterized by calcium carbonate masses and concretions and by chalk fragments.
COMPETING SERIES: This is the
Ichusa and the Ichusa series.
The Ichusa and
Louin are in a smectitic mineralogy class.
GEOGRAPHIC SETTING: Japany soils are nearly level to steep.
These soils formed in clayey sediments in uplands of the Cretaceous Western Gulf Coastal Plain. Slopes range from 0 to 8 percent. The climate is warm and humid. Near the type location, the mean annual temperature is degrees F., and the mean annual precipitation is inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing,
Billstown,
Tiak,
Antoine, and
Delight.
Billstown is located on similar landscapes but has a particle size class of very fine.
Tiak is fine and moderately well drained.
Antoine has a particle size class of fine silty.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow runoff;
and permeability is very slow.
USE AND VEGETATION: Most areas are used for pasture and hay. Smaller acreages are in mixed hardwoods, shortleaf pine, and loblolly pine.
DISTRIBUTION AND EXTENT: Cretaceous Western Gulf Coastal Plain of Arkansas and possibly Oklahoma.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Pike County, Arkansas 2006.
REMARKS: Japany soils were formerly included in the Kipling series. Diagnostic horizon and features recognized in this pedon are:
Ochric epipedon: 0 to 15 cm (0 to 6 in)
Argillic horizon: 15 to 203 cm (6 to 80 in)
Non-intersecting slickensides beginning at about 30 cm (12 in) and continuing to a depth of 140 cm (55 in). (Btss horizons)
ADDITIONAL DATA: Characterization of the typical pedon by the National Soil Survey Laboratory S03AR-109-011
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