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

Karnes County, Texas 133
The Bw horizon is black, very dark gray, or dark
gray in hue of 10YR, value of 3 to 6, and chroma of 1
to 3. Some pedons have as much as 10 percent
masses and concretions of calcium carbonate from
0.125 to 0.25 inch in diameter.
The Bk horizon has hue of 10YR, value of 3 to 6,
and chroma of 1 to 3. It is clay or silty clay. Clay
content is 45 to 60 percent. Masses and concretions
of calcium carbonate from 0.125 to 0.25 inch in
diameter range from 5 to 15 percent. Reaction is
slightly alkaline or moderately alkaline.
Some pedons have a BCk horizon that is grayish
brown, brown, or pale brown. It is clay or silty clay.
Masses of calcium carbonate range from 5 to 10
percent. Reaction is slightly or moderately alkaline.
The 2Cr/Bk horizon is very dark gray, grayish
brown, gray, pale brown, very pale brown, or light
brown in hue of 10YR or 7.5YR, value of 3 to 8, and
chroma of 1 to 4. The 2Cr part is loam or silt loam.
The Bk part is clay or silty clay. This horizon slakes in
water. Reaction is slightly alkaline or moderately
alkaline.
The 2Cr horizon is pale brown, light brown, light
gray, very pale brown, or white in hue of 10YR or
7.5YR, value of 6 to 8, and chroma of 2 to 4. It is
noncalcareous, weakly consolidated, tuffaceous
siltstone that has texture of loam or silt loam
interbedded with thin layers of calcium carbonate.
This horizon slakes in water. Reaction is slightly or
moderately alkaline.
Sarnosa Series
The Sarnosa series consists of very deep, well
drained, moderately permeable soils that formed
in calcareous sandstone and loamy sediments.
These soils are on gently sloping ridgetops or upper
side slopes of uplands. Slopes range from 2 to 5
percent.
The soils of the Sarnosa series are coarse-loamy,
mixed, hyperthermic Typic Calciustolls.
Typical pedon of Sarnosa fine sandy loam, 2 to 5
percent slopes; from the intersection of U.S. Highway
181 and Texas Highway 72 in Kenedy, 0.8 mile east on
Texas Highway 72 to intersection with Farm Road 792,
1.0 mile north on Farm Road 792 to intersection with
county road, 3.6 miles northeast on county road to
private ranch road, 1.0 mile southeast on ranch road,
and 850 feet southwest in pasture. Latitude is 28
degrees, 51 minutes, 07 seconds North; longitude is
97 degrees, 48 minutes, 15 seconds West. Elevation is
285 feet above sea level.
A—0 to 18; dark grayish brown (10YR 4/2) fine sandy
loam, very dark grayish brown (10YR 3/2) moist;
weak fine subangular blocky structure; slightly
hard, friable, nonsticky, nonplastic; common fine
roots; common fine pores; few snail shell
fragments; slightly effervescent; moderately
alkaline; clear smooth boundary.
Bk1—18 to 30 inches; grayish brown (10YR 5/2) fine
sandy loam, dark grayish brown (10YR 4/2) moist;
weak fine subangular blocky structure; soft, friable,
nonsticky, nonplastic; few fine roots; common fine
pores; few small shell fragments; common fine
threads and films of calcium carbonate; slightly
effervescent; moderately alkaline; gradual smooth
boundary.
Bk2—30 to 45 inches; light brownish gray (10YR 6/2)
fine sandy loam, brown (10YR 5/3) moist; weak
fine subangular blocky structure; soft, friable,
nonsticky, nonplastic; few fine roots; few fine
pores; few snail shell fragments; common fine
threads and films of calcium carbonate, few fine
and medium fragments and concretions of calcium
carbonate; strongly effervescent; moderately
alkaline; gradual smooth boundary.
BCk1— 45 to 68 inches; light gray (10YR 7/2) fine
sandy loam, pale brown (10YR 6/3) moist; single
grain; soft, very friable, nonsticky, nonplastic, few
fine pores; few snail shells; common fine threads
and films of calcium carbonate, few fine and
medium masses, fragments, and concretions of
calcium carbonate; strongly effervescent;
moderately alkaline; gradual smooth boundary.
BCk2— 68 to 85 inches; very pale brown (10YR 8/3)
fine sandy loam, very pale brown (10YR 7/3)
moist; single grain; loose; very friable, nonsticky,
nonplastic; many fine and medium masses and
concretions of calcium carbonate; few siliceous
pebbles; strongly effervescent; moderately
alkaline.
The solum is 60 to more than 80 inches thick.
Depth to calcium carbonate accumulations ranges
from 24 to 36 inches.
The A horizon is very dark grayish brown, dark
gray, or dark grayish brown in hue of 10YR, value of 3
or 4, and chroma of 1 or 2.
The Bk horizon is grayish brown, brown, pale
brown, light brownish gray, or light yellowish brown in
hue of 10YR or 7.5 YR, value of 5 or 6, and chroma of
2 to 4. It is fine sandy loam or loam.
The BCk horizon is brown, yellowish brown, light
brownish gray, light gray, or very pale brown in hue of
10YR, value of 6 to 8, and chroma of 2 to 4. It is fine
sandy loam or loam. Some pedons have thin strata of
very weakly cemented calcareous sandstone.