LOCATION IRVINGTON AL+FL GA SCEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, subactive, thermic Plinthic Fragiudults
TypicalPedon: Irvington fine sandy loam--cultivated.
(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; medium acid; clear smooth boundary. (4 to 9 inches thick)
B21tcn--6 to 15 inches; brownish yellow (10YR 6/6) sandy clay loam; weak coarse subangular blocky structure; few thin patchy
clay films; sand grains coated and bridged with clay; 12 percent
fine and medium nodules of ironstone; very strongly acid; gradual wavy boundary. (4 to 12 inches thick)
B22tcn--15 to 27 inches; brownish yellow (10YR 6/6) sandy
clay loam; common medium prominent yellowish red (5YR 5/6) and few fine faint light yellowish brown and strong brown mottles; weak medium and coarse subangular blocky structure; friable, strong
brown and yellowish red mottles are firm; few very thin clay
films; sand grains coated and bridged with clay; 13 percent fine
and medium nodules of ironstone; 3 to 5 percent plinthite in lower part; strongly acid; gradual wavy boundary. (6 to 13 inches
thick)
BX&A degrees2--23 to 33 inches; mottled light yellowish brown (2.5Y 6/4), strong brown (7.5YR 5/6), and red (2.5YR 4/8) sandy
clay loam in 75 percent of the volume, and light gray (10YR 7/2) loamy sand in 25 percent of the volume; the mottled, BX portion
has moderate, very coarse prismatic parting to weak coarse platy
and angular block structure; firm, dense, and compact in about 60 percent of the mass; few fine roots; 5 percent fine and medium nodules of ironstone; and has 3 to 5 percent plinthite; the light gray, A degrees2 portion surrounds the prisms and is
structureless; very friable; common fine and medium roots; and has many uncoated sand grains; strongly acid; gradual smooth boundary. (2 to 7 inches thick)
BX2--33 to 61 inches; mottled brownish yellow (10YR 6/6),
strong brown (7.5YR 5/6), and red (2.5YR 4/6) 70 percent sandy
clay loam, and light gray (2.5Y 7/2) 30 percent sandy clay;
mottled portion has weak coarse prisms parting to weak coarse
platy and angular blocky structure, brittle, many fine pores;
light gray portion is friable and surrounds prisms and has common fine and medium roots; thin patchy clay films on faces of peds and thin continuous clay films in pores; 5 percent nodules of
ironstone; 15 percent plinthite; strongly acid; gradual smooth boundary. (20 to 35 inches thick)
B3--61 to 82 inches; mottled yellowish brown (10YR 5/6),
light gray (10YR 7/1), strong brown (7.5YR 5/8), and yellowish red (5YR 4/6) sandy clay loam; massive; firm; thin discontinuous clay films in larger pores; common medium pores; 5 percent plinthite; strongly acid.
TypeLocation: Baldwin County, Alabama; 1.5 miles SSE of
Robertsdale; 50 feet N of road in SW corner of SE1/4SW1/4, sec. 8,
T. 6 S., R. 4 E.
RangeinCharacteristics: Solum thickness ranges from 60 to 80
inches or more. Depth to the fragipan ranges from 20 to 34
inches. Reaction is strongly acid or very strongly acid, except where limed.
The A1 or Ap horizon has hue of 10YR or 2.5Y, value of 3 to 6, and chroma of 2 or 3. The A2 horizon, where present, is 2 to 7 inches thick. It has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of
2 to 4. Percent by volume of fine to medium nodules of ironstone ranges from 0 to 10 percent. Texture of the A horizon is sandy
loam, fine sandy loam, or loam.
The upper part of the B2 horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 to 6, and chroma of 4 to 8. The lower part of the B2 horizon has the same hue, value, and chroma as the upper part of
the B2 horizon with few to many mottles of chroma 2 or less; or it
is mottled in shades of gray, yellow, brown, or red. Mottles of chroma 2 or less indicative of wetness are between 16 and 30
inches of the surface. Percent by volume of fine to medium
nodules of ironstone ranges from 5 to 25 percent. Percent by
volume of Plinthite ranges from 5 to 30 percent. Texture of the
B2 horizon is loam, sandy clay loam, or clay loam. Silt content
of the control section is 20 to 50 percent.
The Bx horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 to 7,
and chroma of 1 through 6; or it is mottled 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 B3 horizon has the same hue, value, and chroma as the Bx
horizon. Texture is clay loam, sandy clay loam, or sandy clay.
CompetingSeries: There are no other known series in the same
family. Competing series in similar families are the Ardillia, Clarendon, Escambia, Robertsdale, and Saucier series. Ardillia
soils have brittleness in less than 60 percent by volume of the
lower B horizon. Other competing soils do not have fragipans. In addition, Escambia soils have less than 18 percent clay in the
upper 20 inches of the control section.
GeographicGEOGRAPHIC SETTING: Irvington soils are on nearly level to g sloping uplands and interstream divides. The soils formed in
loamy marine sediments. Near the type location, the mean annual precipitation is about 67 inches and the mean annual temperature
is about 67 degrees F.
GeographicallyAssociatedSoils: These are the competing Escambia, Robertsdale, and Saucier series on similar landforms and the
Atmore, Bama, Benndale, Grady, Lucedale, Malbis, and Poarch
series. Atmore and Grady soils are on lower landforms and have matrix colors with chroma 2 or less. Bama, Benndale, Lucedale, Malbis, and Poarch soils are on adjacent higher landforms and do
not have mottles of chroma 2 or less within 30 inches of the
surface.
DrainageandPermeability: Moderately well drained; slow to medium runoff; slow permeability. A water table is at 1.5 to 3.0 feet during winter and spring.
UseandVegetation: Most areas are cultivated to potatoes, corn,
small grains, or soybeans. Forested areas are mixed pines, oaks, sweetgum, and other hardwoods
DistributionandExtent: Coastal Plain of Alabama, Florida,
Georgia, and South Carolina.
MLRA OFFICE RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Mobile County, Alabama, 1930.