\<@37\>Pedro Variant Series

\<@33\>\<i\>*Major Land Resource Area:*\<p\> 138---North-Central Florida
Ridge

\<@33\>\<i\>*Local physiographic area:*\<p\> Coastal Plain

\<@33\>\<i\>*Geomorphic setting:*\<p\> Karst

\<@33\>\<i\>*Parent material:*\<p\> Sandy and loamy marine sediments
over limestone

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

\<@33\>\<i\>*Permeability class:*\<p\> Moderately rapid

\<@33\>\<i\>*Soil depth class:*\<p\> Shallow to limestone bedrock

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

\<@33\>\<i\>*Slope:*\<p\> 0 to 5 percent

\<@33\>\<i\>*Taxonomic classification:*\<p\> Loamy, siliceous,
superactive, hyperthermic, shallow Typic Hapludalfs

\<@27\>Associated Soils

\<@32\>The Pedro Variant soils are commonly associated on the landscape
with Alpin, Bigbee, Blanton, Chiefland, Garcon, Meggett, and Plummer
soils.

-   \<@49\>The Alpin and Bigbee soils are sandy throughout and are
    excessively drained.

-   \<@29\>The Blanton soils have sandy surface and subsurface layers
    with a combined thickness of 40 to 80 inches and are moderately well
    drained.

-   \<@29\>The Chiefland soils are moderately deep to limestone bedrock
    and have sandy surface and subsurface layers with a combined
    thickness of 20 to 40 inches.

-   \<@29\>The Garcon soils are very deep, have sandy surface and
    subsurface layers with a combined thickness of 20 to 40 inches, and
    are somewhat poorly drained.

-   \<@29\>The Meggett soils are very deep, have a clayey subsoil, and
    are poorly drained.

-   \<@29\>The Plummer soils are very deep, have sandy surface and
    subsurface layers with a combined thickness of 40 to 80 inches, and
    are poorly drained.

\<@27\>Typical Pedon

\<@32\>Pedro Variant fine sand, in an area of Chiefland-Pedro Variant
complex, occasionally flooded; about 0.75 mile west of U.S. Highway 27,
about 0.65 mile north of County Highway 138, and 25 feet east of a
subdivision trail; sec. 19, T. 7 S., R. 17 E.; High Springs SW, Florida,
USGS 7.5-minute quadrangles; lat. 29 degrees, 51 minutes, 40 seconds
north and long. 82 degrees, 39 minutes, 11 seconds west.

\<@23\>Ap---0 to 3 inches; gray (10YR 5/1) fine sand; weak fine granular
structure; very friable; common fine and medium roots; slightly acid;
clear wavy boundary.

\<@33\>E---3 to 8 inches; brown (10YR 5/3) fine sand; single grain;
loose; common fine and medium roots; neutral; clear irregular boundary.

\<@33\>Bt---8 to 11 inches; dark brown (10YR 4/4) sandy clay loam; weak
fine subangular blocky structure; friable, slightly sticky and slightly
plastic; neutral; abrupt irregular boundary.

\<@33\>2Cr---11 to 14 inches; very pale brown (10YR 8/2), soft weathered
limestone; moderately alkaline; gradual irregular boundary.

\<@33\>2R---14 inches; hard, fractured limestone bedrock.

\<@27\>Range in Characteristics

\<@32\>The thickness of the solum and the depth to soft, weathered
limestone ranges from 6 to 20 inches. Most pedons have solution holes
that are up to 60 inches deep. Reaction ranges from strongly acid to
slightly acid in the surface horizon and from slightly acid to slightly
alkaline in the subsoil.

\<@32\>The A or Ap horizon has hue of 10YR, value of 4 to 7, and chroma
of 1 to 3. The texture is sand or fine sand.

\<@32\>The E horizon has hue of 10YR, value of 5 to 7, and chroma of 3
or 4. The texture is sand or fine sand.

\<@32\>The Bt horizon has hue of 7.5YR or 10YR, value of 4 to 6, and
chroma of 4 to 8. The texture is sandy clay loam, fine sandy loam, or
sandy loam. The content of soft and hard limestone fragments ranges from
0 to 10 percent, by volume.

\<@32\>The 2Cr horizon is weathered limestone. It has hue of 10YR, value
of 7 or 8, and chroma of 1 to 4. It is commonly mixed with fragments of
hard limestone. In some pedons it has boulders.

\<@32\>This pedon is a variant of the Pedro series because it is thermic
rather than hyperthermic and because it has hard limestone bedrock at a
depth of less than 20 inches. Other than these differences, the
properties of the Pedro Variant are within the concepts of the Pedro
series.