Soil Survey of Karnes County, Texas - Soil Data Mart - US ...

116 Soil Survey
The 2BCtk horizon is dark gray to very pale brown
in hue of 10YR, value of 4 to 7, and chroma of 2 to 4. It
is sandy clay, clay loam, or sandy clay loam or their
gravelly counterparts that have mottles in shades of
yellow or brown and a few masses of calcium
carbonate. Some pedons contain pockets or clusters
of salt, gypsum, other salts in the lower part. Reaction
is slightly alkaline or moderately alkaline.
The 2Cr horizon is light gray or white in hue of
10YR, value of 7 or 8, and chroma of 1 or 2. The
material is weakly consolidated sandstone that has
fine sandy loam or very fine sandy loam texture. Some
pedons have thin layers of weakly cemented
sandstone or sandstone interbedded with thin platy
layers of soft shale. Some pedons contain B horizon
material in small pockets or channels and streaks and
spots in shades of yellow and brown. Some pedons
have a few masses of calcium carbonate. Reaction is
neutral to moderately alkaline.
Imogene Series
The Imogene series consists of very deep,
moderately well drained, very slowly permeable soils
that formed in saline, calcareous sediments. These
nearly level soils are on uplands and low stream
terraces. Slopes range from 0 to 1 percent.
The soils of the Imogene series are fine-loamy,
mixed, hyperthermic Mollic Natrustalfs.
Typical pedon of Imogene fine sandy loam, 0 to 1
percent slopes; from the intersection of Texas Highway
123 and Farm Road 887 in Pawelekville, 6.3 miles
east on Farm Road 887, and 100 feet east in pasture.
Latitude is 29 degrees 04 minutes 41 seconds North;
longitude is 97 degrees 51 minutes 05 seconds West.
Elevation is 325 feet above sea level.
A—0 to 8 inches; gray (10YR 5/1) fine sandy loam;
very dark grayish brown (10YR 3/2) moist;
massive; hard, firm, nonsticky, nonplastic;
common fine roots throughout; few fine
discontinuous tubular pores; few fine root
channels; slightly acid; abrupt smooth boundary.
Btn—8 to 17 inches; very dark gray (10YR 3/1) sandy
clay loam; very dark gray (10YR 3/1) moist;
moderate medium columnar structure parting to
moderate medium angular blocky; extremely hard,
extremely firm, slightly sticky, slightly plastic;
common fine roots throughout; few fine
discontinuous tubular pores; very few distinct
continuous clay films (cutans) on faces of peds;
slightly alkaline; clear wavy boundary.
Btnz1—17 to 28 inches; grayish brown (10YR 5/2)
sandy clay loam; dark grayish brown (10YR 4/2)
moist; moderate fine and medium columnar
structure parting to moderate medium angular
blocky; very hard, very firm, slightly sticky, slightly
plastic; few fine roots throughout; few fine
discontinuous tubular pores; very few distinct
patchy clay films (cutans) on faces of peds; few
fine salt masses; slightly alkaline; gradual wavy
boundary.
Btnz2—28 to 45 inches; light yellowish brown (10YR
6/4) sandy clay loam; pale brown (10YR 6/3)
moist; moderate fine and medium angular blocky
structure; very hard, very firm, slightly sticky,
slightly plastic; few fine roots throughout; few fine
discontinuous tubular pores; very few distinct
patchy clay films (cutans) on faces of peds;
common fine and medium salt masses;
moderately alkaline; gradual wavy boundary.
BCnz—45 to 80 inches; light gray (2.5Y 7/2) sandy
clay loam; light brownish gray (2.5Y 6/2) moist;
weak medium subangular blocky structure; few
fine streaks of Bt horizon material between depths
of 45 and 48 inches; common fine and medium
salt threads and masses; few fine rounded ironmanganese
concretions; moderately alkaline.
The solum is 60 to 80 inches thick. Soil salinity
ranges from 8 to 12 mmhos within a depth of 40
inches.
The A horizon is in shades of gray and brown in
hue of 10YR, value of 3 to 5, and chroma of 1 to 3.
Reaction is slightly acid or neutral. SAR and ESP
range from 0 to 5.
The Btn horizon is in shades of black, gray, or
brown in hue of 10YR, value of 3 or 4, and chroma of
1 or 2. It is sandy clay loam, or clay loam. Reaction is
slightly alkaline or moderately alkaline. SAR ranges
from 10 to 20. Some pedons have as much as 2
percent fine masses of calcium carbonate.
The Btnz horizon is in shades of black, gray, or
brown in hue of 10YR, value of 4 to 6, and chroma of 2
to 4. It is sandy clay loam or clay loam. It contains as
much as 20 percent masses or threads of neutral
salts. Reaction is slightly alkaline or moderately
alkaline. SAR ranges from 25 to 30. Some pedons
have up to 2 percent fine masses of calcium
carbonate.
The BCnz horizon is in shades of gray and brown in
hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 2
or 3. It is sandy clay loam. It contains as much as 20
percent masses and threads of neutral salts. It has as
much as 2 percent fine black concretions. Reaction
ranges from neutral to moderately alkaline. SAR
ranges from 20 to 25. Some pedons have as much as
2 percent fine masses of calcium carbonate.