\<@37\>Bruin Series

\<@33\>\<i\>*Major Land Resource Area:*\<p\> 131---Southern Mississippi
Valley Alluvium

\<@33\>\<i\>*Local physiographic area:*\<p\> High positions on natural
levees

\<@33\>\<i\>*Geomorphic setting:*\<p\> Natural levees on alluvial plains

\<@33\>\<i\>*Parent material:*\<p\> Silty alluvium

\<@33\>\<i\>*Geology:*\<p\> Alluvial flood plains

\<@33\>\<i\>Drainage class:\<p\> Moderately well drained

\<@33\>\<i\>Permeability class:\<p\> Moderate

\<@33\>\<i\>*Soil depth class:*\<p\> Very deep

\<@33\>\<i\>*Shrink-swell potential:*\<p\> Low

\<@33\>\<i\>*Slope:*\<p\> 0 to 3 percent

\<@33\>\<i\>*Taxonomic classification:*\<p\> Coarse-silty, mixed,
superactive, thermic Oxyaquic Eutrudepts

\<@27\>Associated Soils

\<@30\>The Bruin series is commonly associated with Commerce and Tunica
soils.

-   \<@49\>The Commerce soils are somewhat poorly drained.

-   \<@29\>The Tunica soils are clayey in the upper part of the solum.

\<@27\>Typical Pedon

\<@25\>Bruin silt loam, 0 to 1 percent slopes; 2.25 miles south on
Louisiana Highway 605 from its intersection with Louisiana Highway 4 in
Newellton, 900 feet west-southwest on a field road, and 100 feet south
of the road in field of row crops; E1/4 sec. 17, T. 12 N., R. 12 E.;
Newellton, Louisiana, USGS 7.5-minute quadrangle; lat. 32 degrees, 2
minutes, 36.92 seconds north and long. 91 degrees, 13 minutes, 18.67
seconds west.

\<@23\>Ap1---0 to 6 inches; silt loam, brown (10YR 4/3) broken face;
weak fine subangular blocky structure; very friable; common very fine
and fine roots throughout; strongly acid; clear smooth boundary.

\<@33\>Ap2---6 to 11 inches; silt loam, brown (10YR 5/3) broken face;
very friable; common very fine and fine roots throughout; common fine
low-continuity tubular pores; 5 percent patchy prominent light yellowish
brown (2.5Y 6/3) silt coats on faces of peds; 1 percent fine faint
spherical extremely weakly cemented yellowish brown (10YR 5/4)
iron-manganese masses that are in the matrix and have sharp boundaries;
strongly acid; clear smooth boundary.

\<@33\>Bw---11 to 20 inches; silt loam, yellowish brown (10YR 5/4)
broken face; weak fine subangular blocky structure; very friable; common
very fine and fine roots throughout; common fine low-continuity tubular
pores; 5 percent patchy prominent light yellowish brown (2.5Y 6/3) silt
coats on faces of peds; slightly acid; clear wavy boundary.

\<@33\>C1---20 to 28 inches; stratified very fine sandy loam, brown
(10YR 5/3) broken face; weak fine subangular blocky structure; very
friable; common very fine and fine roots throughout; common fine
low-continuity tubular pores; 3 percent fine and medium distinct
spherical extremely weakly cemented yellowish brown (10YR 5/6)
iron-manganese masses that are in the matrix and have clear boundaries;
1 percent fine faint spherical extremely weakly cemented grayish brown
(10YR 5/2) iron depletions that are in the matrix and have clear
boundaries; neutral; clear wavy boundary.

\<@33\>C2---28 to 36 inches; stratified silt loam, brown (10YR 5/3)
broken face; weak fine subangular blocky structure; friable; common very
fine and fine roots throughout; common fine and medium low-continuity
tubular pores; 15 percent discontinuous faint dark gray (2.5Y 4/1)
organic stains; 3 percent medium distinct spherical extremely weakly
cemented yellowish brown (10YR 5/6) iron-manganese masses that are in
the matrix and have sharp boundaries; slightly alkaline; abrupt wavy
boundary.

\<@33\>C3---36 to 41 inches; stratified loam, 60 percent yellowish brown
(10YR 5/4) and 40 percent grayish brown (10YR 5/2) broken face; weak
fine subangular blocky structure; friable; common very fine and fine
roots throughout; common fine low-continuity tubular pores; 3 percent
medium prominent spherical extremely weakly cemented yellowish brown
(10YR 5/6) iron-manganese masses that are in the matrix and have sharp
boundaries; moderately alkaline; abrupt wavy boundary.

\<@33\>Ab---41 to 51 inches; silt loam, very dark grayish brown (2.5Y
3/2) broken face; weak fine subangular blocky structure; very friable;
common very fine and fine roots throughout; common fine and medium
low-continuity tubular pores; 25 percent medium prominent spherical
extremely weakly cemented strong brown (7.5YR 4/6) iron-manganese masses
that are in the matrix and have sharp boundaries; 5 percent fine faint
spherical weakly cemented very dark gray (2.5Y 3/1) iron-manganese
concretions that are in the matrix and have sharp boundaries; slightly
alkaline; abrupt smooth boundary.

\<@33\>Cb---51 to 57 inches; stratified silt loam, brown (10YR 5/3)
broken face; weak fine subangular blocky structure; very friable; common
very fine and fine roots throughout; common fine low-continuity tubular
pores; 5 percent coarse distinct spherical extremely weakly cemented
yellowish brown (10YR 5/6) iron-manganese masses that are in the matrix
and have sharp boundaries; moderately alkaline; clear smooth boundary.

\<@33\>A´b---57 to 66 inches; silt loam, dark grayish brown (2.5Y 4/2)
broken face; moderate medium subangular blocky structure; friable;
common fine and medium low-continuity tubular pores; 5 percent medium
distinct spherical extremely weakly cemented olive yellow (2.5Y 6/6)
iron-manganese masses that are in the matrix and have sharp boundaries;
1 percent fine prominent spherical weakly cemented black (10YR 2/1)
iron-manganese concretions that are in the matrix and have sharp
boundaries; moderately alkaline; clear smooth boundary.

\<@33\>C´b1---66 to 71 inches; stratified silt loam, light olive brown
(2.5Y 5/3) broken face; weak fine subangular blocky structure; very
friable; common fine and medium low-continuity tubular pores; 25 percent
medium prominent spherical extremely weakly cemented yellowish brown
(10YR 5/6) iron-manganese masses that are in the matrix and have sharp
boundaries; moderately alkaline; clear smooth boundary.

\<@33\>C´b2---71 to 81 inches; stratified silt loam, olive gray (5Y 5/2)
broken face; weak fine subangular blocky structure; very friable; common
fine and medium low-continuity tubular pores; 5 percent medium distinct
spherical extremely weakly cemented light olive brown (2.5Y 5/4)
iron-manganese masses that are in the matrix and have sharp boundaries;
moderately alkaline.

\<@27\>Range in Characteristics

\<@33\>\<i\>*Thickness of the solum:*\<p\> 18 to 40 inches

\<@33\>\<i\>*Content of clay in the control section:*\<p\> Less than 18
percent

\<@33\>\<i\>*Redoximorphic features:*\<p\> Iron-manganese accumulations
throughout; iron depletions within a depth of 24 inches

\<@33\>\<i\>*Other distinctive features:*\<p\> Silt coats in the A and B
horizons; tubular pores throughout

\<@33\>\<i\>*Concentrated minerals:*\<p\> None

\<@23\>\<i\>*A or Ap horizon:*\<p\>

\<@31\>Color---hue of 10YR, value of 4 or 5, and chroma of 2 or 3

\<@31\>Redoximorphic features---iron depletions with chroma of 2 or less
within a depth of 24 inches

\<@31\>Texture---silt loam or very fine sandy loam

\<@31\>Other distinctive features---silt coats and tubular pores

\<@31\>Reaction---strongly acid to slightly alkaline

\<@31\>Thickness---4 to 12 inches

\<@23\>\<i\>*Bw horizon:*\<p\>

\<@31\>Color---hue of 10YR, value of 4 or 5, and chroma of 3 or 4

\<@31\>Redoximorphic features---iron depletions with chroma 2 or less
within a depth of 24 inches

\<@31\>Texture---very fine sandy loam, loam, or silt loam

\<@31\>Other distinctive features---silt coats and tubular pores

\<@31\>Reaction---slightly acid to slightly alkaline

\<@31\>Thickness---5 to 40 inches

\<@23\>\<i\>*BC horizon: (where present)*\<p\>

\<@31\>Color---hue of 10YR, value of 4 or 5, and chroma of 3 or 4

\<@31\>Redoximorphic features---iron depletions with chroma 2 or less
within a depth of 24 inches

\<@31\>Texture---very fine sandy loam, loam, or silt loam

\<@31\>Other distinctive features---tubular pores

\<@31\>Reaction---slightly acid to moderately alkaline

\<@31\>Thickness---0 to 20 inches

\<@23\>\<i\>*Ab horizon: (where present)*\<p\>

\<@31\>Color---hue of 10YR or 2.5Y, value of 3 or 4, and chroma of 1 or
2

\<@31\>Redoximorphic features---the number of iron-manganese
accumulations in shades of brown ranges from none to common.

\<@31\>Texture---very fine sandy loam, loam, or silt loam

\<@31\>Other distinctive features---tubular pores

\<@31\>Reaction---slightly acid to moderately alkaline

\<@31\>Thickness---0 to 12 inches

\<@23\>\<i\>*C horizon:*\<p\>

\<@31\>Color---hue of 10YR, value of 4 or 5, and chroma of 1 to 4; or
hue of 2.5Y or 5Y, value of 4 or 5, and chroma of 1 to 3

\<@31\>Redoximorphic features---iron depletions in shades of gray and
iron-manganese accumulations in shades of brown

\<@31\>Texture---loamy fine sand, loamy very fine sand, fine sandy loam,
very fine sandy loam, loam, silty clay loam, or silt loam to a depth of
60 inches or more

\<@31\>Other distinctive features---carbonates in some pedons; tubular
pores

\<@31\>Reaction---slightly acid to moderately alkaline

\<@31\>Thickness---6 to 71 inches