LOCATION IRVINGTON AL+GA MS
Established Series
Rev. GWH; GRB
05/2013
IRVINGTON SERIES
The Irvington series consists of very deep, moderately well drained, slowly permeable soils on uplands and interstream divides of the Southern Coastal Plain Major Land Resource Area (MLRA 133A). They formed in loamy marine sediments. Near the type location, the mean annual temperature is about 67 degrees F., and the mean annual precipitation is about 67 inches. Slopes range from 0 to 8 percent.
TAXONOMIC CLASS: Fine-loamy, siliceous, subactive, thermic Plinthic Fragiudults
TYPICAL PEDON: Irvington fine sandy loam, in a cultivated field (Colors are for moist soil).
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) fine sandy loam; weak medium granular structure; friable; few fine and medium nodules of ironstone; moderately acid; clear smooth boundary. (4 to 9 inches thick)
Btc--6 to 15 inches; brownish yellow (10YR 6/6) sandy clay loam; weak coarse subangular blocky structure; few faint clay films on ped faces; sand grains coated and bridged with clay; about 12 percent, by volume, fine and medium nodules of ironstone; very strongly acid; gradual wavy boundary. (4 to 12 inches thick)
Btv--15 to 23 inches; brownish yellow (10YR 6/6) sandy clay loam; weak medium and coarse subangular blocky structure; friable; few faint clay films on ped faces; sand grains coated and bridged with clay; about 13 percent, by volume, fine and medium nodules of ironstone; about percent, by volume, plinthite; common medium prominent yellowish red (5YR 5/6) and few fine faint yellowish brown (10YR 5/6) and strong brown (7.5YR 5/6) areas of iron accumulation; strongly acid; gradual wavy boundary. (6 to 13 inches thick)
B/E--23 to 33 inches; 25 percent light yellowish brown (2.5Y 6/4), 25 percent strong brown (7.5YR 5/6) 25 percent red (2.5YR 4/8) sandy clay loam in 75 percent of the volume (B) and light gray (10YR 7/2) loamy sand in 25 percent of the volume (E); the variegated B portion has moderate, very coarse prismatic parting to weak coarse platy and angular blocky structure; the light gray E portion surrounds the prisms and is structureless; very friable; firm, dense, and compact in about 60 percent of the mass; few fine roots; about 5 percent, by volume, fine and medium nodules of ironstone; about 4 percent, by volume, plinthite; common fine and medium roots; many uncoated sand grains; the areas of light yellowish brown, strong brown and red are iron accumulations and the areas of light gray are areas of iron depletions; strongly acid; gradual smooth boundary. (2 to 7 inches thick)
Btxv--33 to 61 inches; 25 percent brownish yellow (10YR 6/6), 25 percent strong brown (7.5YR 5/6), 20 percent red (2.5YR 4/6) and 30 percent light gray (2.5Y 7/2) sandy clay loam; weak coarse prisms parting to weak coarse platy and angular blocky structure, brittle, many fine pores; friable; common fine and medium roots; few faint clay films on faces of peds and in pores; about 5 percent, by volume, ironstone nodules; about 15 percent, by volume, plinthite; the areas of brownish yellow, strong brown and red are iron accumulations and the areas of light gray are areas of iron depletions; strongly acid; gradual smooth boundary. (20 to 35 inches thick)
B'tv--61 to 82 inches; 25 percent yellowish brown (10YR 5/6), 25 percent light gray (10YR 7/1), 25 percent strong brown (7.5YR 5/8), and 25 percent yellowish red (5YR 4/6) sandy clay loam; weak coarse angular and blocky structure; firm; few faint clay films in larger pores; common medium pores; about 5 percent, by volume, plinthite; the areas of yellow brown, strong brown and yellowish red are iron accumulations and the areas of light gray are iron depletions; strongly acid.
TYPE LOCATION: Baldwin County, Alabama. Approximately 1.5 miles SSE of Robertsdale, about 50 feet N of road in the SW corner of SE 1/4, SW 1/4, Sec. 8, T. 6 S., R. 4 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 80 inches or more. Depth to the fragipan ranges from 20 to 34 inches. Silt content of the control section ranges from 20 to 50 percent. Reaction ranges from very strongly acid or strongly acid, except where the surface has been limed.
The A or Ap horizon has hue of 10YR or 2.5Y, value of 3 to 6, and chroma of 2 or 3. Texture is very fine sandy loam, fine sandy loam, sandy loam or loam.
The E horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 2 to 4. Content of ironstone nodules range from 0 to 10 percent, by volume. Texture is fine sandy loam, sandy loam or loam.
The Btc horizon has hue of 7.5YR to 2.5Y, value of 4 to 6, and chroma of 4 to 8. Iron accumulations in shades of yellow and brown range from none to common. Content of ironstone nodules ranges from 5 to 25 percent, by volume. Content of plinthite ranges from 2 to 4 percent, by volume. Texture is loam, sandy clay loam, or clay loam.
The Btv horizon has hue of 7.5YR to 2.5Y, value of 4 to 6, and chroma of 4 to 8; or there is no dominant color and is variegated in shades of gray, yellow, brown or red. Redoximorphic features in shades of grey, yellow, brown and red range from few to many. Content of ironstone nodules ranges from 5 to 25 percent, by volume. Content of Plinthite ranges from 5 to 30 percent, by volume. Texture is loam, sandy clay loam or clay loam.
The B portion of the B/E horizon has hue of 7.5YR to 10YR, value of 4 to 6, and chroma of 4 to 8; or there is no dominant color and is variegated in shades of yellow, brown or red. Redoximorphic features in shades of grey, yellow, brown and red range from few to many. Content of ironstone nodules ranges from 5 to 25 percent, by volume. Content of Plinthite ranges from 5 to 30 percent, by volume. Texture is loam, sandy clay loam or clay loam.
The E portion of the B/E horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 1 to 2. Texture is loamy fine sand, loamy sand or silt loam.
The Btxv horizon has hue of 7.5YR to 2.5Y, value of 4 to 7, and chroma of 1 through 6; or there is no dominant color and it is variegated in shades of red, yellow, brown, or gray. Percent by volume of brittleness ranges from 60 to 90 percent. Percent by volume of plinthite ranges from 5 to 30 percent. Texture is loam, sandy clay loam, or clay loam.
The Btxvg horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 1 or 2. Iron accumulations in shades of yellow, brown and red range from common to many. Percent by volume of brittleness ranges from 60 to 90 percent. Percent by volume of plinthite ranges from 5 to 30 percent. Texture is loam, sandy clay loam, or clay loam.
The BC horizon, where present, has the same hue, value, and chroma as the Btxv horizon. Texture is clay loam, sandy clay loam, or sandy clay.
The B'tv horizon has the same range of colors as the Btxv horizon. Percent by volume of brittleness ranges from 60 to 90 percent. Percent by volume of plinthite ranges from 5 to 30 percent. Texture is loam, sandy clay loam, or clay loam.
COMPETING SERIES: There are no other known series in the same family.
GEOGRAPHIC SETTING: Irvington soils are on uplands and interstream divides. They formed in loamy marine sediments. The climate is humid subtropical. Slopes range from 0 to 8 percent. Near the type location, the mean annual precipitation is about 67 inches and the mean annual temperature is about 67 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Atmore,
Bama,
Benndale,
Escambia,
Grady,
Lucedale,
Malbis,
Poarch,
Robertsdale and
Saucier series. The poorly drained Atmore and Grady soils are on lower adjacent positions. In addition, Atmore soils have coarse-loamy control sections and Grady soils have clayey control sections and lack plinthite. The well drained Bama and Lucedale soils are on adjacent higher positions, lack plinthite and have redder subsoils. The well drained Benndale soils are on higher positions, have less than 5 percent plinthite in the subsoil and have coarse-loamy control sections. The somewhat poorly drained Escambia and Robertsdale soils are on lower positions. In addition, Escambia soils have coarse-loamy subsoils. The moderately well and well drained Malbis and Poarch soils are on higher positions and lack fragic qualities. In addition, Poarch soils have coarse-loamy control sections. Saucier soils are on similar positions but lack fragic qualities.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to medium runoff; slow permeability.
USE AND VEGETATION: Most areas of Irvington soils are cultivated to potatoes, corn, small grains, or soybeans. Forested areas consist of mixed pines, oaks, sweetgum and other hardwoods.
DISTRIBUTION AND EXTENT: The Southern Coastal Plain of Alabama, Georgia and Mississippi. The soil is of moderate known extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Auburn, Alabama.
SERIES ESTABLISHED: Mobile County, Alabama, 1930.
REMARKS: Diagnostic horizons and features for this pedon:
Ochric epipedon - the zone from 0 to 6 inches (Ap horizon).
Plinthic horizons - the zones from 15 to 27 inches and from 33 to 82 inches (Btv, Btxv and B'tv horizons).
Fragic - the zone from 33 to 61 inches (Btxv horizon).
A water table is at 1.5 to 3.0 feet during winter and spring.
Irvington 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 was provided by Auburn University, Soil Characterization Laboratory, Auburn AL and the National Soil Survey Laboratory, Lincoln, NE.
National Cooperative Soil Survey
U.S.A.