LOCATION MYATT AL+AR FL GA LA MS NC SC VA
Established Series
Rev. LFR: GWH; GRB
10/2018
MYATT SERIES
The Myatt series consists of very deep, poorly drained, moderately slowly permeable soils on stream terraces and upland flats of the Southern Coastal Plain (MLRA 133A). They formed in regolith consists of medium to moderately fine textured marine or fluvatile sediments. They are saturated during the winter and spring. Near the type location, the mean annual temperature is about 62 degrees F., and the mean annual precipitation is about 53 inches. Slopes range from 0 to 2 percent.
TAXONOMIC CLASS: Fine-loamy, siliceous, active, thermic Typic Endoaquults
TYPICAL PEDON: Myatt silt loam, in a pasture on a smooth 0.5 percent slope (Colors are for moist soil).
Ap--0 to 5 inches; gray (10YR 5/1) silt loam, weak fine granular structure; very friable; many fine roots; common fine distinct yellowish brown (10YR 5/6) masses of iron accumulation; very strongly acid; abrupt smooth boundary. (4 to 9 inches thick)
Eg--5 to 10 inches; light brownish gray (10YR 6/2) loam, weak fine granular and weak fine subangular blocky structure; friable; many fine roots; few fine distinct yellowish brown (10YR 5/6) and brownish yellow (10YR 6/6) masses of iron accumulation; very strongly acid; gradual wavy boundary. (0 to 8 inches thick)
Btg--10 to 32 inches; gray (10YR 6/1) sandy clay loam, weak fine and medium subangular blocky structure; friable; few fine roots; common distinct clay films on faces of peds and in pores; many coarse distinct yellowish brown (10YR 5/6) masses of iron accumulation; very strongly acid; gradual wavy boundary. (16 to 50 inches thick)
BCg--32 to 50 inches; gray (10YR 6/1) loam; weak medium subangular blocky structure; friable; common faint clay films along vertical cracks and on some faces of peds; many prominent strong brown (7.5YR 5/8) masses of iron accumulations; extremely acid; clear wavy boundary. (0 to 20 inches thick)
2Cg--50 to 72 inches; 35 percent gray (10YR 6/1), 30 percent yellowish brown (10YR 5/6) and 30 percent strong brown (7.5YR 5/6) gravelly fine sandy loam; massive; very friable; the areas of gray are iron depletions and the areas of yellowish brown and strong brown are iron accumulations; extremely acid.
TYPE LOCATION: Fayette County, Alabama. Approximately one mile west of Winfield on road to Upper Coastal Plain Experiment Station, NW1/4, NE1/4 Sec. 19, T. 13 S., R. 21 W.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 60 inches. Reaction ranges from very strongly acid to moderately acid in the upper part of the solum and from extremely acid to strongly acid in the lower part of the solum and the underlying material. Coarse fragments range from 0 to 3 percent, by volume, in the solum and from 5 to 25 percent in the underlying material. The control section has 18 to 35 percent clay and 20 to 45 percent silt.
The A or Ap horizon has hue of 2.5Y or 10YR, value of 2 to 6, and chroma of 1 or 2. Redoximorphic features in shades of brown, yellow and gray range from none to common. Texture is silt loam, loam, very fine sandy loam, fine sandy loam, sandy loam, loamy sand or loamy fine sand.
The ABg, BAg, Eg or BEg horizon, where present, has hue of 2.5Y or 10YR, value of 4 to 7, and chroma of 1 or 2. Iron accumulations in shades of brown and yellow range from few to many. Texture has the same range as the A or Ap horizon.
The Btg horizon has hue of 5Y to 10YR, value of 3 to 7, and chroma of 2 or less; or it is neutral with value of 3 to 7. Iron accumulations are in shades of brown, red or yellow range from few to many. Texture is sandy clay loam, clay loam, loam, fine sandy loam or sandy loam. Some pedons have a subhorizon within the Btg horizon of sandy clay with strata of sandier material.
The BCg horizon, where present, has the same range in hue, value,
and chroma as the Btg horizon. Texture is sandy loam, fine sandy loam, sandy clay loam or loam. Some pedons are stratified with sandy and clayey material.
The CBg, Cg or 2Cg horizon, where present, has the same range in hue, value and chroma as the Bg horizon; or there is no dominant color and is variegated in shades of yellow, brown, red and gray. Some pedons have gleyed horizons. Texture is dominantly sandy loam, fine sandy loam, sandy clay loam, clay loam or their gravelly analogues; but some pedons are stratified with sandy and clayey material.
COMPETING SERIES: There are no known series in the same family. The
Ogeechee series is in a closely related family. Other series in similar families include the
Amy,
Lumbee,
Rains,
Tomotley and
Weston series. All of these series are on similar positions as Myatt soils. Ogeechee and Rains soils have a solum thickness of more than 60 inches. In addition, Ogeechee soils are subactive. Amy soils have fine-silty control sections. Lumbee soils have a solum thickness of less than 40 inches. Tomotley soils have mixed mineralogy. Weston soils have coarse-loamy control sections.
GEOGRAPHIC SETTING: Myatt soils are on level or nearly level broad stream terraces that and upland flats in the Southern Coastal Plain. Slopes range from 0 to 2 percent. They formed in medium to moderately fine-textured marine or fluvatile sediments. The climate is humid subtropical. Near the type location, the mean annual temperature ranges from 60 to 64 degrees F., and the mean annual precipitation ranges from 50 to 56 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: In addition to the competing
Rains and
Weston soils on similar landforms, these include the
Bibb,
Leaf,
Mantachie,
Pheba,
Prentiss,
Savannah and
Stough soils. Bibb and the somewhat poorly drained Mantachie soils are on lower adjacent flood plains and do not have an argillic horizon. In addition, Bibb soils have coarse-loamy control sections. Leaf soils are on similar landforms but have clayey control sections. Pheba, Prentiss, Savannah, and Stough soils are on adjacent positions. All of these series have fragipans except Stough which has fragic qualities. In addition, the somewhat poorly drained Pheba soils have coarse-silty control sections, the moderately well drained Prentiss soils have coarse-loamy control sections, Savannah soils are moderately well drained and the somewhat poorly drained Stough soils have coarse-loamy control sections.
DRAINAGE AND PERMEABILITY: Poorly drained; very slow to slow runoff; moderately slow to moderate permeability.
USE AND VEGETATION: Most areas of Myatt soils are in woodland or pasture. Some cleared areas are used for growing corn, cotton, oats and hay crops. Common forest trees are water oak, maple, sweetgum, ash, cypress, bay and some pine.
DISTRIBUTION AND EXTENT: Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina and Virginia. The series is of large extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: Ouachita Parish, Louisiana; 1903.
REMARKS: Diagnostic horizons and features in this pedon:
Ochric epipedon - the zone from 0 to 10 inches (Ap and Eg horizons).
Argillic horizon - the zone from 10 to 50 inches (Btg and BCg horizons).
Myatt soils have endosaturation.
Myatt soils are in MLRA 133A.
ADDITIONAL DATA: Laboratory data is available on the National Soil Survey website at: http://ncsslabdatamart.sc.egov.usda.gov/querypage.aspx
Laboratory data is provided by Auburn University, Soil Characterization laboratory, Auburn AL and the National Soil Survey Laboratory, Lincoln, NE.
National Cooperative Soil Survey
U.S.A.