LOCATION SIDON AREstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, active, thermic Typic Fragiudults
TYPICAL PEDON: Sidon silt loam, 3 percent slope in pasture.
(Colors are for moist soil unless otherwise
stated.)
Ap--0 to 6 inches; brown (10YR 4/3) loam; weak fine
subangular blocky structure; friable; many fine roots; few fine pores; few fine dark concretions; very strongly acid; abrupt
smooth boundary. (4 to 8 inches thick)
B21t--6 to 13 inches; strong brown (7.5YR 4/6) clay loam; moderate medium subangular blocky structure; friable; many fine roots; common fine pores; few thin patchy clay films on faces of
peds and in pores; few fine dark concretions; very strongly acid; clear smooth boundary. (5 to 12 inches thick)
B22t--13 to 25 inches; yellowish brown (10YR 5/6) clay loam; moderate medium subangular blocky structure; friable; common fine roots; common fine pores; few thin patchy clay films on faces of
peds and in pores; extremely acid; gradual wavy boundary. (6 to
18 inches thick)
Bx--25 to 41 inches; strong brown (7.5YR 5/6) clay loam;
common medium distinct reddish brown (5YR 4/4), light brownish
gray (10YR 6/2) and gray (10YR 6/1) mottles; weak very coarse prismatic structure parting to moderate medium angular blocky;
firm, compact and brittle; few fine roots between prisms; few fine pores; continuous distinct clay films on faces of peds and in
pores; streaks and patches of clean silt and sand grains between prisms and some peds; prisms have a mean width of more than 4
inches; about 70 percent of material is brittle; extremely acid; gradual smooth boundary. (8 to 36 inches thick)
B3t--41 to 53 inches; strong brown (7.5YR 5/6) clay loam;
common medium distinct red (2.5YR 4/6) and gray (10YR 6/1) mottles and streaks; moderate very coarse platy structure parting to weak medium angular blocky; firm, slightly brittle; many horizontal and common vertical streaks of continuous distinct clay films and
small patches of clean sand grains; about 15 percent by volume subrounded sandstone fragments 1/2 inch to 3 inches in diameter extremely acid; clear wavy boundary. (0 to 24 inches thick)
R--53 inches; horizontal bedded hard sandstone.
TYPE LOCATION: White County, Arkansas; 2 miles north of Denmark
on U. S. Highway 167, then 0.6 mile east on county road in NW1/4NE1/4NE1/4 sec. 12, T. 10 N., R. 6 W.
RANGE IN CHARACTERISTICS: Solum thickness typically is 44 to 60 inches but ranges from 40 to more than 60 inches. Depth to hard bedrock ranges from 40 to more than 60 inches. Some pedons have
thin Cr horizons. Depth to the fragipan ranges from 20 to 36
inches. Reaction ranges from strongly acid to extremely acid
except where surface layers are limed. Weathered sandstone
fragments less than 3 inches in diameter in the A and Bt horizons range from 0 to 5 percent by volume.
The Ap or A1 horizon is 4 to 8 inches thick. It has hue of 10YR, values of 4 and 5 and chromas of 3 or 4. Textures are silt loam
or loam.
The B21t horizon has hues of 7.5YR or 10YR; value of 5 and chroma
of 6 or 8. In some pedons yellowish red (5YR 5/6, 5/8) coatings
are on faces of peds. Texture is clay loam, silty clay loam, or loam.
The B22t horizon has hue of 10YR or 7.5YR, value of 5 and chroma
of 6 or 8. It has none to common mottles in shades of gray below depths of 16 inches. Texture is silty clay loam, clay loam, or
loam.
The Bx horizon has matrix colors with hue of 10YR or 7.5YR, value
of 5 and chroma of 6 or 8; and mottles in hue of 10YR, value 6 or
7, and chroma 1 or 2; and hue of 2.5YR, value of 4 or 5 and chroma
of 6 or 8, or hue of 5YR, value of 4 or 5, and chroma of 6; or is mottled with shades of the above colors. Textures are loam, clay loam, sandy clay loam, or with gravelly textural modifiers. It
has 0 to 35 percent by volume coarse fragments.
The B3t horizon has colors similar to those of the Bx horizon. Texture is sandy loam, loam, sandy clay loam, clay loam, or with gravelly textural modifier, or very gravelly clay loam. It has 0
to 45 percent by volume of coarse fragments. In some pedons this horizon is lacking.
Some pedons have C horizons about 1 to 6 inches thick, and has
colors similar to the Bx horizon.
If present, Cr horizons, about 1 to 4 inches thick, are reddish, brownish, or grayish weathered sandstone.
The R horizon is hard level-bedded acid sandstone with few cracks that have horizontal spacing of 6 inches or more.
COMPETING SERIES: These are the
Atlee,
Cane,
Ora,
Savannah, and
Vaucluse series. The depth to bedrock is greater than 60 inches
in these soils. In addition, Cane and Ora soils have Bt horizons centered on yellowish red or reddish brown. Vaucluse soils have
more than 45 percent fine and coarser sands in the B2t horizons.
GEOGRAPHIC SETTING: Sidon soils are on undulating plateaus, broad benches and sideslopes at higher elevations of the uplands. These soils dominantly have slopes between 2 and 8 percent but ranges
from 0 to 12 percent. The soil formed in loamy residuum weathered from sandstone and interbedded siltstone and shale. Near the type location, average annual temperature is about 62 degrees F., and average annual precipitation is about 49 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Enders,
Linker,
and
Mountainburg series. All of these soils lack fragipans. In addition, Enders soils have more than 35 percent clay in the upper
20 inches of the argillic horizon and are on lower sideslopes. Linker soils are moderately deep to sandstone and are on nearby landscapes and lower benches. Mountainburg soils are shallow to sandstone and are on higher ridgetops.
DRAINAGE AND PERMEABILITY: Sidon soils are moderately well
drained. Runoff is medium and permeability is slow. A perched
water table is at a depth of 2 to 3 feet in late winter and early spring.
USE AND VEGETATION: Most of these soils are used for pasture, soybeans, grain sorghums, and truck gardening. Forested areas are mosly shortleaf pine, loblolly pine, northern red oak, and white
oak
DISTRIBUTION AND EXTENT: Boston Mountains, Arkansas Valley and Ridges of Arkansas and possibly Oklahoma. The series is of
moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Baxter County, Arkansas; 1978.
REMARKS: They were formerly included in the Leadvale series.