LOCATION MACON AL+AREstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, thermic Typic Paleudalfs
TYPICAL PEDON: Macon fine sandy loam--pasture.
(Colors are for moist soil unless otherwise
stated.)
Ap--0 to 9 inches; brown (7.5YR 4/4) fine sandy loam; weak
fine granular structure; very friable; many fine roots; few very
fine black and brown nodules; strongly acid; abrupt smooth
boundary. (4 to 10 inches thick)
Bt1--9 to 12 inches; dark brown (7.5YR 4/4) clay loam; weak
fine subangular blocky structure; friable; common fine roots; few fine black and brown nodules; strongly acid; clear wavy boundary.
(3 to 4 inches thick)
Bt2--12 to 24 inches; reddish brown (5YR 4/4) clay loam; moderate fine subangular blocky structure; firm, plastic; few
fine roots; few black and brown nodules; clay films on faces of
peds and in pores; sand grains coated and bridged with clay;
medium acid; clear wavy boundary. (12 to 15 inches thick)
Bt3--24 to 36 inches; yellowish red (5YR 4/6) clay loam, few medium distinct light yellowish brown mottles; moderate fine and medium subangular blocky structure; firm, plastic; clay films on faces of peds; common fine black and brown nodules; patchy black coatings; medium acid; gradual wavy boundary. (12 to 18 inches thick)
Bt4--36 to 50 inches; strong brown (7.5YR 5/6) sandy clay, common medium distinct pale brown mottles; weak to moderate
coarse subangular blocky structure; firm, plastic; patchy clay
films on faces of peds; common fine black and brown nodules; thin black coatings; very strongly acid; gradual wavy boundary. (13
to 18 inches thick)
Bt5--50 to 60 inches; light yellowish brown (2.5Y 6/4) sandy clay, many fine faint yellowish brown and distinct light gray mottles; weak coarse subangular blocky structure; firm, plastic;
few fine black and brown nodules; patchy clay films on faces of
peds and in pores; very strongly acid; gradual wavy boundary.
(10 to 18 inches thick)
BC--60 to 75 inches; pale olive (5Y 6/3) sandy clay, many
fine distinct and faint light yellowish brown, light gray, and
pale brown mottles; massive; firm, plastic; few to common fine
black and brown nodules; very strongly acid.
TYPE LOCATION: Greene County, Alabama; 1.5 miles west of the courthouse in Eutaw, on new Mt. Hebron Road, 200 feet south of
road and east of private road, SW1/4NE1/4 sec. 32, T. 22 N., R. 2
E.
RANGE IN CHARACTERISTICS: Thickness of solum and depth to
bedrock ranges from 60 to more than 80 inches. Reaction ranges
from medium to very strongly acid throughout.
The A horizon has hue of 10YR or 7.5YR, value of 4 through 6, and chroma of 2 through 4. It is fine sandy loam, or loam.
The Bt1 horizon has hue of 10YR through 5YR, value of 4, and
chroma of 4 or 6. It is clay loam, sandy clay loam or loam.
The Bt2 horizon has hue of 7.5YR through 5YR, value of 3 through
6, and chroma of 4 or 6. It is clay loam, sandy clay loam, or
loam. The control section has more than 20 percent silt.
The Bt3 horizon has hue of 7.5YR through 2.5YR, value of 3
through 5, and chroma of 6 or 8. Mottles in shades of brown,
red, and yellow range from few to common. It is clay loam, sandy clay loam, sandy clay, silty clay loam, or clay.
The matrix of the Bt4 and Bt5 horizons have hue of 5YR through
2.5YR, value of 4 through 6, and chroma of 4 through 8. These horizons contain common to many mottles in shades of brown, red,
and gray. They are clay loam, sandy clay loam, sandy clay, or
clay.
The BC horizon has hue of 10YR through 5Y, value of 4 through 6,
and chorma of 3 through 6. It has common to many mottles in
shades of red, brown, and gray. Texture is clay loam, sandy clay loam, sandy clay, or clay. Black and brown nodules range from
few to common.
COMPETING SERIES: The
Kamie series is the only other series in
the same family. Kamie soils have less clay and redder colors in
the lower subsoils.
GEOGRAPHIC SETTING: Macon soils are at the margin between the Southern Coastal Plain and Blackland Prairies. They are on
nearly level to moderately steep slopes. Slope gradients range
from 0 to 20 percent. They formed in thick beds of moderately
fine and fine-textured materials. The climate is warm and humid. Average annual temperature is about 67 degrees F. and average
annual precipitation is 60 inches near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Angie,
Boswell,
Kipling,
Mayhew,
Oktibbeha,
Vaiden, and
Wilcox series. All of
these soils contain more clay and are wetter.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; slow permeability.
USE AND VEGETATION: Most areas have been cleared and are used
for growing corn, cotton, pasture, and hay. Forests are of mixed hardwoods, loblolly pine, and shortleaf pines.
DISTRIBUTION AND EXTENT: Alabama and Mississippi. The series is
of small extent.
MLRA OFFICE RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Macon County, Alabama; 1940.