LOCATION SHADYGROVE AL+MO
Established Series
Rev. JHB:GWH
10/2018
SHADYGROVE SERIES
The Shadygrove series consists of moderately well drained, slowly permeable soils that formed in clayey fossiliferous sediments of marine origin. These soils are on undulating to rolling uplands
of the Southern Coastal Plain. Slopes range from 2 to 20 percent. The mean annual temperature is about 66 degrees F. and the mean annual precipitation is about 53 inches.
TAXONOMIC CLASS: Fine, smectitic, thermic Typic Hapludalfs
TYPICAL PEDON: Shadygrove sandy loam on an undulating 8 percent slope, in a planted pine woodland. (Colors are for moist soil.)
A--0 to 6 inches; very dark grayish brown (10YR 3/2) sandy loam; weak fine granular structure; very friable; non-sticky; common fine and medium roots; few flaggy fossiliferous claystones; strongly acid; clear smooth boundary. (4 to 7 inches thick)
Bt1--6 to 16 inches; mottled yellowish brown (10YR 5/6), pale brown (10YR 6/3), yellowish red (5YR 4/6), and red (2.5Y 4/6) clay; moderate fine and medium subangular blocky structure; firm; very sticky; common fine and medium roots; thick continuous clay film on faces of peds; few flaggy fossiliferous claystones; very strongly acid; gradual wavy boundary. (10 to 18 inches thick)
Bt2--16 to 23 inches; mottled yellowish brown (10YR 5/6), pale brown (10YR 6/3), gray (10YR 6/1), yellowish red (5YR 4/6), and red (2.5YR 4/6) clay; strong medium and coarse subangular
blocky structure that parts to moderate fine and medium angular blocky; firm; very sticky; common fine roots; thin clay films on faces of peds; few flaggy fossiliferous claystones; strongly acid; clear wavy boundary. (8 to 15 inches thick)
CB--23 to 30 inches; mottled yellowish brown (10YR 5/6), pale brown (10YR 6/3), gray (5Y 5/1), yellowish red (5YR 4/6), and red (2.5YR 4/6) flaggy clay; massive; firm; sticky; few thin patchy clay films on horizontal surfaces of fragments; few small stress surfaces; common fine roots in cracks and along surfaces of fragments; about 30 percent by volume flaggy and cobbly fossiliferous claystones; strongly acid; gradual wavy boundary. (5 to 10 inches thick)
C--30 to 65 inches; mottled gray (5Y 5/1), grayish brown (2.5Y 5/2), brownish yellow (10YR 6/6), strong brown (7.5YR 5/6), and yellowish red (5YR 4/6) very flaggy clay loam; massive; firm; sticky; few small stress surfaces; about 70 percent flaggy and cobbly fossiliferous claystones; few fine roots in cracks and along surfaces of fragments; strongly acid.
TYPE LOCATION: Coffee County, Alabama; 0.7 mile northeast of Antioch Church on Coffee County Road 21, one mile north on intersecting county road and 600 feet east of road in the NE1/4NW1/4 sec. 3, T. 7 N., R. 19 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 20 to 40 inches but is commonly less than 25 inches. Reaction is strongly acid or very strongly acid except for surface layers that have
been limed. Few to common thin to very thick flat fragments and cobbles occur through the solum in most pedons. Hardness of fragments is less than 3 on Moh's scale.
The A or Ap horizon has hue of 10YR or 2.5Y, value of 3 through 5, and chroma of 2 through 4. Texture is sandy loam, fine sandy loam, loamy sand, silt loam, loam, or silty clay loam. Most pedons with silty clay loam surface layers are eroded.
The E horizon, where present, has hue of 10YR or 2.5Y, value of 5 through 8, and chroma of 3 or 4. Texture is sandy loam, fine sandy loam, loamy sand, silt loam, or loam.
The upper part of the Bt horizon has hue of 5YR or 2.5YR, value of 4 or 5, and chroma of 4 through 8, or is mottled with hue of 2.5YR, 5YR, 7.5YR, and 10YR, value of 4 through 7, and chroma of 3 through 8, or has a matrix color in the same hue, value, and chroma as above, and has many mottles of two or more of the other colors. Texture is clay loam, sandy clay, or clay.
The lower part of the Bt horizon is mottled with hue of 2.5YR, 5YR, 7.5YR, and 10YR, value of 4 through 7, and chroma of 1 through 6, or has a matrix color in hue, value, and chroma as above with common to many mottles of two or more of the other colors. Texture is clay loam, sandy clay, or clay.
The BC, CB, or C horizons are mottled in hue of 2.5YR through 5Y, value of 4 through 7, and chroma of 1 through 8, or have a matrix in hue of 10YR, 2.5Y, or 5Y, value and chroma as above and common
to many red, brown, and gray mottles. They contain from 20 to 80 percent thin to very thick flat fragments and cobbles of fossiliferous claystone. Fine earth material with textures of silty clay loam, clay loam, clay, or sandy clay fills the cracks between fragments of rock.
COMPETING SERIES: These are the
Iredell and
Kisatchie series. These soils have yellower hue. Other similar soils include the
Arundel,
Boswell,
Luverne,
Sunsweet, and
Susquehanna series. Arundel and Luverne soils have mixed mineralogy and lack gray mottles in the upper 24 inches of the argillic horizon. Boswell and Susquehanna soils have thicker sola and higher shrink-swell properties. Sunsweet soils have thicker sola and kaolinitic mineralogy. In addition, all these soils lack fragments of fossiliferous claystone.
GEOGRAPHIC SETTING: Shadygrove soils are on very gently undulating to strongly rolling erosional surfaces on Coastal Plain uplands. Slopes range from 2 to 20 percent but are commonly 5 to 12 percent. These soils formed in beds of fossiliferous marine sediments locally called "burhstone" and "sandy claystone." The climate is warm and humid.
GEOGRAPHICALLY ASSOCIATED SOILS: These are
Lucy,
Luverne,
Orangeburg, and
Troup series. These soils formed in beds of unconsolidated sediments overlying the older, more consolidated "burhstone" or claystone sediments from which Shadygrove soils were derived. Luverne soils occur in the same landscape as Shadygrove soils. Lucy, Orangeburg, and Troup soils are well drained loamy upland soils and typically have simple convex slopes. Shadygrove soils commonly have both concave and convex slopes.
DRAINAGE AND PERMEABILITY: Moderately well drained. Moderate to rapid runoff. Slow permeability. Water moves slowly laterally through the C horizons during wet periods causing seep areas along lower side slopes.
USE AND VEGETATION: Used mainly for timber production and wildlife habitat. A few small areas have been cleared and areused for pasture. Native vegetation consists mainly of loblolly pine and mixed hardwoods with an understory consisting mostly of dogwood, sweetgum, and gallberry.
DISTRIBUTION AND EXTENT: Gulf Coastal Plains of Alabama, Missouri, and possibly Georgia and Mississippi. The series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Coffee County, Alabama; 1976.
REMARKS: This soil was formerly mapped in the Lauderdale series.
National Cooperative Soil Survey
U.S.A.