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

Karnes County, Texas 31
18 to 45 inches, very pale brown, moderately alkaline
sandy clay loam
Underlying material:
45 to 80 inches, very pale brown, moderately alkaline
fine sandy loam
Important soil properties—
Available water capacity: moderate
Permeability: moderate
Drainage class: well drained
Runoff: low to medium
Root zone: very deep
Shrink-swell potential: low
Hazard of water erosion: severe
Hazard of wind erosion: slight
Included with this soil in mapping are small areas of
Colibro soil that has slopes of less than 5 percent,
small areas where slopes are more than 12 percent,
and small areas where the Colibro soil has a fine
sandy loam surface layer. Also included are small
areas of Pernitas, Sarnosa, and Shiner soils. The
Pernitas soil has a dark surface layer and is in
positions on the landscape similar to those of the
Colibro soil. The Sarnosa soil has a fine sandy loam
texture and is in similar positions. The Shiner soil is
shallow and in higher positions on the landscape.
Included soils make up less than 15 percent of this
map unit.
This Colibro soil is used mainly as rangeland and
improved pasture. A few areas are used as habitat for
wildlife.
Native plants yield moderate amounts of forage.
The moderate available water capacity and low natural
fertility are the major limitations. Proper stocking rates,
brush management, and controlled grazing can help
improve or maintain productivity.
This soil is also used as improved pasture.
Improved varieties of bermudagrass, bluestems, and
kleingrass are the major pasture grasses grown. The
moderate available water capacity, low natural fertility
and high lime content of the soil are limitations. The
hazard of water erosion is severe. Fertilizer
applications, weed control, brush management, proper
stocking rates, and controlled grazing can help
conserve moisture and improve or maintain
productivity.
This soil has fair potential for use as openland and
rangeland wildlife habitat. The moderate available
water capacity and excess lime content of the soil limit
the plant growth necessary for good habitat.
This soil has very limited use as cropland. Areas
where slopes are more than 8 percent should not be
cultivated. The moderate available water capacity, high
lime content of the soil, and low natural fertility are
limitations. Water erosion is a severe hazard.
This soil is poorly suited to urban uses. Slopes of
more than 7 percent, the excess lime content of the
soil, and moderate potential for corrosion of uncoated
steel are limitations. Seepage can be a problem for
landfills, sewage lagoons, and reservoirs. Trench
sidewalls are unstable in this soil. Trenches that are
excavated to a depth of more than 5 feet should be
shored or the sidewall should be graded to an angle
that ensures safe working conditions.
This soil is moderately suited to recreational uses.
Slope is the main limitation.
This Colibro soil is in capability subclass VIe and in
the Gray Sandy Loam range site.
CdA—Condido clay, 0 to 2 percent slopes
This soil is shallow to cemented caliche. This nearly
level to very gently sloping soil is on ridgetops and
upper side slopes on uplands. Areas are irregular in
shape and range from 10 to 500 acres in size.
The typical sequence, depth, and composition of
the layers of this soil are as follows—
Surface layer:
0 to 6 inches, black, neutral clay
6 to 15 inches, very dark gray, neutral clay
15 to 18 inches, very dark gray, moderately alkaline,
gravelly clay
Subsoil:
18 to 24 inches, white, moderately alkaline, strongly
cemented caliche
24 to 40 inches, very pale brown, moderately alkaline,
weakly consolidated siltstone that has silt loam
texture
Underlying material:
40 to 80 inches, very pale brown, moderately alkaline,
weakly consolidated siltstone that has silt loam
texture
Important soil properties—
Available water capacity: very low
Permeability: very slow
Drainage class: well drained
Runoff: low
Root zone: shallow, petrocalcic layer impedes root
development
Shrink-swell potential: high in the surface layer; low in
the subsoil
Hazard of water erosion: moderate