Soil Survey of Dallas County, Texas Page: 12
vii, 153 p., 70 fold. p. of plates : ill., maps ; 29 cm.View a full description of this book.
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SOIL SURVEY
These soils have very low potential for urban develop-
ment. The high shrink-swell potential and low strength of
the soil are limitations. Sloping areas erode easily, but
this erosion can be controlled by sodding or other ero-
sion-control practices. The high content of clay is a limi-
tation to recreation uses, but this limitation can be over-
come by adding a layer of loamy or sandy topsoil. Wet
spots and ponding are limitations in some areas.
This map unit was not assigned to a capability sub-
class or a range site.
5-Austin silty clay, 1 to 3 percent slopes. This is a
moderately deep, well drained, gently sloping soil on
uplands. The areas are oval to long and narrow and
range from 10 to several hundred acres.
Typically, the surface layer is moderately alkaline, very
dark grayish brown silty clay about 10 inches thick. To a
depth of 32 inches, the soil is moderately alkaline, brown
silty clay. White, platy chalk is at a depth of 32 inches. It
is massive at a depth of 34 inches.
Permeability is moderately slow, and the available
water capacity is low. Runoff is medium, and the hazard
of erosion is moderate.
Included in mapping are small areas of Austin silty clay
loam and Dalco, Lewisville, and Stephen soils. The in-
cluded soils make up less than 15 percent of any one
mapped area.
This soil is used mainly as cropland and pasture. It has
high potential for these uses. If this soil is used for
crops, crop residue should be left on the surface to help
control erosion, reduce runoff and soil temperature, con-serve moisture, and maintain soil tilth and productivity
(fig. 5). This soil is well suited to improved bermuda-
grass.
This soil has medium potential for urban development.
The high shrink-swell potential, corrosivity, low strength,
and moderate depth of the soil are limitations to urban
uses.
This soil is in capability subclass Ille and in the Clay
Loam range site.
6-Austin silty clay, 3 to 5 percent slopes. This is a
moderately deep, well drained, gently sloping soil. The
areas are oblong to oval and range from 10 to about 50
acres.
Typically, the surface layer is moderately alkaline, very
dark grayish brown silty clay about 8 inches thick. To a
depth of 28 inches, the soil is moderately alkaline, brown
silty clay. White, platy chalk, or soft limestone, is at a
depth of 28 inches. The chalk is massive below a depth
of about 35 inches.
Permeability is moderately slow, and the available
water capacity is low. Runoff is medium, and the hazard
of erosion is moderate.
Included in some mapped areas are small areas of
Austin silty clay loam and Stephen and Eddy soils. The
included soils make up less than 15 percent of any one
mapped area.
This soil is used mainly as pasture and cropland. It has
medium potential for these uses. If this soil is used forWpm"I - 11l...M . .r. b 4 I J '
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General Soil Map, Dallas County, Texas (Map)
Map displays soil types along with creeks, towns, schools, churches, power transmission lines, oil and gas pipelines, roads, and railroads. Includes legend and symbols. Scale 1:253,400
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Coffee, Daniel R. Soil Survey of Dallas County, Texas, book, 1980; Washington D.C.. (https://texashistory.unt.edu/ark:/67531/metapth130211/m1/22/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.