\<@37\>Johns Series

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

\<@33\>\<i\>*Drainage class:*\<p\> Somewhat poorly drained

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

\<@33\>\<i\>*Parent material:*\<p\> Loamy and sandy alluvium

\<@33\>\<i\>*Landform:*\<p\> Stream terraces

\<@33\>\<i\>*Landform position:*\<p\> Flats

\<@33\>\<i\>*Slope:*\<p\> 0 to 2 percent

\<@33\>\<i\>*Taxonomic class:*\<p\> Fine-loamy over sandy or
sandy-skeletal, siliceous, semiactive, thermic Aquic Hapludults

\<@27\>Commonly Associated Soils

\<@30\>Columbus, Latonia, Quitman, and Smithton soils are commonly
associated with the Johns series.

-   \<@49\>The moderately well drained Columbus soils and the well
    drained Latonia soils are in the slightly higher, more convex
    positions.

-   \<@29\>The Quitman soils are in positions similar to those of the
    Johns soils and do not have sandy layers within a depth of 60
    inches.

-   \<@29\>The poorly drained Smithton soils are in shallow
    drainageways.

\<@27\>Typical Pedon

\<@30\>Johns loamy fine sand, 0 to 2 percent slopes; 100 feet east of
Bayou Heron Road; 2,000 feet south and 1,150 feet east of the northwest
corner of sec. 18, T. 7 S., R. 4 W.

\<@23\>Ap---0 to 7 inches; very dark gray (10YR 3/1) loamy fine sand;
weak medium granular structure; very friable; many fine, common very
fine, and few medium roots; very strongly acid; abrupt wavy boundary.

\<@33\>E---7 to 13 inches; light yellowish brown (2.5Y 6/4) sandy loam;
weak medium subangular blocky structure; friable; common fine and very
fine roots; few fine distinct brownish yellow (10YR 6/6) masses of iron
accumulation; very strongly acid; gradual smooth boundary.

\<@33\>EB---13 to 16 inches; light yellowish brown (2.5Y 6/4) sandy
loam; weak medium subangular blocky structure; friable; common fine and
few coarse roots; common fine faint gray (10YR 6/1) iron depletions;
many fine and medium distinct brownish yellow (10YR 6/8) and common fine
prominent red (2.5YR 4/6) masses of iron accumulation; very strongly
acid; clear smooth boundary.

\<@33\>Bt1---16 to 26 inches; very pale brown (10YR 7/4) sandy clay
loam; moderate medium subangular blocky structure; few fine roots;
common faint clay films on faces of peds; common medium prominent red
(2.5YR 4/8) and common medium distinct yellowish brown (10YR 5/8) masses
of iron accumulation; very strongly acid; gradual smooth boundary.

\<@33\>Bt2---26 to 34 inches; 40 percent gray (10YR 6/1), 35 percent
brownish yellow (10YR 6/8), 15 percent red (2.5YR 4/8), and 10 percent
reddish yellow (7.5YR 6/8) sandy loam; weak coarse subangular blocky
structure; friable; few faint clay films on faces of peds; areas of
brownish yellow, red, and reddish yellow are masses of iron
accumulation; areas of gray are iron depletions; very strongly acid;
clear smooth boundary.

\<@33\>2Cg1---34 to 47 inches; light gray (10YR 7/1) sand; single
grained; loose; common thin streaks of uncoated sand; few fine distinct
light olive brown (2.5Y 5/6) masses of iron accumulation; very strongly
acid; clear wavy boundary.

\<@33\>2Cg2---47 to 82 inches; white (10YR 8/1) sand; single grained;
loose; very strongly acid.

\<@27\>Range in Characteristics

\<@33\>\<i\>*Thickness of the solum:*\<p\> 15 to 40 inches

\<@33\>\<i\>*Reaction:*\<p\> Very strongly acid or strongly acid
throughout the profile, except for the surface layer in areas that have
been limed

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

\<@31\>Color---hue of 10YR, value of 3 to 5, and chroma of 1 to 3

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

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 3 or
4

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

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

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 3 to
6

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

\<@31\>Redoximorphic features---few or common iron depletions in shades
of brown or gray and masses of iron accumulation in shades of brown,
yellow, or red

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

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 3 to
8; or no dominant matrix color and multicolored in shades of gray,
brown, yellow, and red

\<@31\>Texture---clay loam, sandy clay loam, or sandy loam

\<@31\>Redoximorphic features---common or many iron depletions in shades
of brown or gray and masses of iron accumulation in shades of brown,
yellow, or red

\<@23\>\<i\>*2Cg horizon:*\<p\>

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 to 8, and chroma of 1 or
2

\<@31\>Texture---coarse sand, sand, or loamy sand

\<@31\>Redoximorphic features---few to many masses of iron accumulation
in shades of brown, yellow, or red