Compass Series

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

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

\<@33\>\<i\>*Permeability:*\<p\> Moderately slow

\<@33\>\<i\>*Parent material:*\<p\> Loamy sediments

\<@33\>\<i\>*Landform:*\<p\> Ridges and stream terraces

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

\<@33\>\<i\>*Slope:*\<p\> 1 to 3 percent

\<@33\>\<i\>*Taxonomic class:*\<p\> Coarse-loamy, siliceous, subactive,
thermic Plinthic Paleudults

\<@27\>Commonly Associated Soils

\<@30\>Bonifay, Cowarts, Fuquay, and Orangeburg soils are commonly
associated with the Compass series.

-   \<@49\>The Bonifay and Fuquay soils are commonly on summits and side
    slopes at higher elevations than the Compass soils and have a thick,
    sandy epipedon.

```{=html}
<!-- -->
```
-   \<@29\>The Cowarts soils are on side slopes and are fine-loamy.

-   \<@29\>The Orangeburg soils are on summits and side slopes at higher
    elevations than the Compass soils, have a reddish kandic horizon,
    and are fine-loamy.

\<@27\>Typical Pedon

\<@30\>Typical pedon of Compass loamy sand, 1 to 3 percent slopes; about
1 mile north of Luverne; 400 feet west and 1,800 feet south of the
northeast corner of sec. 19, T. 9 N., R. 18 E.; USGS Luverne topographic
quadrangle; lat. 31 degrees 45 minutes 0 seconds N. and long. 86 degrees
17 minutes 30 seconds W.

\<@23\>Ap---0 to 10 inches; brown (10YR 4/3) loamy sand; weak fine
granular structure; very friable; many fine and few medium roots;
strongly acid; clear smooth boundary.

\<@33\>BE---10 to 15 inches; yellowish brown (10YR 5/4) sandy loam; weak
medium subangular blocky structure; very friable; common fine roots;
strongly acid; clear wavy boundary.

\<@33\>Bt1---15 to 27 inches; brownish yellow (10YR 6/6) sandy loam;
weak medium subangular blocky structure; friable; common fine roots; few
faint clay films on faces of peds; few fine distinct reddish yellow
(7.5YR 6/6) masses of iron accumulation; few fine distinct pale brown
(10YR 6/3) iron depletions; very strongly acid; gradual wavy boundary.

\<@33\>Bt2---27 to 37 inches; brownish yellow (10YR 6/8) sandy loam;
weak medium subangular blocky structure; friable; common fine roots; few
faint clay films on faces of peds; about 2 percent masses of nodular
plinthite; about 5 percent fine ironstone pebbles; few fine distinct
reddish yellow (7.5YR 6/6) masses of iron accumulation; few fine
distinct very pale brown (10YR 7/4) iron depletions; very strongly acid;
gradual wavy boundary.

\<@33\>Btv1---37 to 48 inches; brownish yellow (10YR 6/6) sandy loam;
moderate medium subangular blocky structure; friable; common faint clay
films on faces of peds; about 5 percent masses of nodular plinthite;
about 5 percent fine ironstone pebbles; common medium prominent light
gray (10YR 7/2) iron depletions; common medium prominent reddish yellow
(7.5YR 6/6) masses of iron accumulation; very strongly acid; clear wavy
boundary.

\<@33\>Btv2---48 to 57 inches; brownish yellow (10YR 6/8) sandy clay
loam; moderate medium subangular blocky structure; friable; common faint
clay films on faces of peds; about 10 percent masses of nodular
plinthite; about 10 percent fine ironstone pebbles; common medium
distinct gray (10YR 6/1) iron depletions; common medium distinct strong
brown (7.5YR 4/6) and red (2.5YR 4/6) masses of iron accumulation; very
strongly acid, clear wavy boundary.

\<@33\>Btv3---57 to 75 inches; 40 percent reddish yellow (7.5YR 6/6), 20
percent brownish yellow (10YR 6/6), 20 percent grayish brown (10YR 5/2),
and 20 percent red (2.5YR 4/6) sandy clay loam; moderate coarse
subangular blocky structure; firm; common faint clay films on faces of
peds; about 15 percent masses of nodular plinthite; about 12 percent
fine ironstone pebbles; areas of grayish brown are iron depletions; very
strongly acid; gradual wavy boundary.

\<@33\>Btv4---75 to 80 inches; 40 percent reddish yellow (7.5YR 6/6), 25
percent red (2.5YR 4/6), 20 percent grayish brown (10YR 5/2), and 15
percent brownish yellow (10YR 6/6) sandy clay loam; weak coarse
subangular blocky structure; firm; common faint clay films on faces of
peds; about 10 percent masses of nodular plinthite; about 5 percent fine
pebbles of quartzite and ironstone; areas of grayish brown are iron
depletions; very strongly acid.

\<@27\>Range in Characteristics

\<@33\>\<i\>*Thickness of the solum:*\<p\> More than 60 inches

\<@33\>\<i\>*Content of plinthite:*\<p\> 5 to 25 percent in the Btv
horizon

\<@33\>\<i\>*Reaction:*\<p\> Very strongly acid or strongly acid
throughout the profile, except for the surface layer in areas where lime
has been applied

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

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

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

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

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

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

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 4 to
8

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

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

\<@23\>\<i\>*Btv horizon (upper part):*\<p\>

\<@31\>Color---hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 6 to
8

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

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

\<@23\>\<i\>*Btv horizon (lower part):*\<p\>

\<@31\>Color---no dominant matrix color and multicolored in shades of
brown, red, gray, and yellow

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