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LAMAR AND DELTA COUNTIES, TEXAS
<br />This map unit consists of prairie soils that have a
<br />loamy surface layer and a clayey subsoil. Slopes are 0 to
<br />5 percent (fig. 3). This unit makes up about 22 percent of
<br />the survey areas. It is about 30 percent Wilson soils, 26
<br />percent Normangee soils, 22 percent Crockett soils, and
<br />22 percent other soils.
<br />. Wilson soils are nearly level to gently sloping and are
<br />on ridgetops and foot slopes. These soils are somewhat
<br />poorly drained. The surface layer is very dark gray,
<br />slightly acid silt loam about 6 inches thick. Between
<br />depths of 6 and 9 inches, the soil is very dark gray,
<br />medium acid clay loam. Between depths of 9 and 28
<br />inches, the soil is very dark gray, slightly acid clay. Be-
<br />tween depths of 28 and 39 inches, the soil is dark gray,
<br />neutral clay. Between depths of 39 and 80 inches, the
<br />soil is grayish brown, mildly alkaline clay that has light
<br />olive brown and olive yellow mottles.
<br />Normangee soils are gently sloping and are on tops
<br />and sides of ridges. These soils are moderately well
<br />drained. The surface layer is dark brown, slightly acid
<br />clay loam about 7 inches thick. Between depths of 7 and
<br />16 inches, the soil is brown, medium acid clay that has
<br />red, reddish brown, and dark grayish brown mottles. Be-
<br />tween depths of 16 and 28 inches, the soil is yellowish
<br />brown, neutral clay that has mottles in shades of red and
<br />brown. Between depths of 28 and 38 inches, the soil is
<br />mottled grayish brown and light olive brown, mildly alka-
<br />line clay. Between depths of 38 and 48 inches, the soil is
<br />light olive brown, moderately alkaline clay that has gray-
<br />ish brown mottles. Between depths of 48 and 57 inches,
<br />the soil is mottled olive, light olive brown, and yellowish
<br />brown, moderately alkaline clay. The underlying material
<br />is light olive gray, moderately alkaline weathered shale to
<br />a depth of 65 inches. It has light olive brown mottles.
<br />Crockett soils are gently sloping and are on tops and
<br />sides of ridges. These soils are moderately well drained.
<br />The surface is very dark grayish brown, slightly acid loam
<br />about 8 inches thick. Between depths of 8 and 17
<br />inches, the soil is mottled brown and reddish brown,
<br />slightly acid clay. Between depths of 17 and 29 inches,
<br />the soil is mottled light olive brown and olive, slightly
<br />acid clay. Between depths of 29 and 39 inches, the soil
<br />is olive, neutral clay that has strong brown and yellowish
<br />red mottles. Between depths of 39 and 51 inches, the
<br />soil is olive brown, mildly alkaline clay. Between depths
<br />of 51 and 59 inches, the soil is light olive brown, moder-
<br />ately alkaline clay loam that has grayish brown and light
<br />olive brown mottles. Between -depths of 59 and 73
<br />inches, the soil is mottled light gray and brownish yellow,
<br />moderately alkaline loam.
<br />Other soils are Parisian, Mabank, Lassiter, and Roxton
<br />soils. Parisian and Mabank soils have a loamy surface
<br />layer and a clayey subsoil.-They are gently sloping and
<br />nearly level and are on uplands. The loamy Lassiter and
<br />clayey Roxton soils are frequently flooded and are on
<br />bottom lands.
<br />5
<br />The soils in this unit have high potential for pastur
<br />and hay. They have medium potential for crops an
<br />range. They have very slow permeability, erode easil;_
<br />and are droughty. Potential for woodland is low because
<br />of very slow permeability. There is no woodland grazing
<br />in this unit. Soils in this unit are used mainly for range or,
<br />for pasture and hay.
<br />The soils in this unit have medium potential for most
<br />urban uses. Limiting factors are low strength and the
<br />shrinking and swelling with changes in moisture content.
<br />The potential for recreation is medium because of the
<br />very slow permeability.
<br />4. Trinity- Kaufman
<br />Nearly level, very slowly permeable, clayey soils on flood
<br />plains
<br />This map unit consists of clayey soils that crack when
<br />dry. Slopes are 0 to 1 percent. This unit makes up about
<br />10 percent of the survey area. It is about 59 percent
<br />Trinity soils, 33 percent Kaufman soils, and 8 percent
<br />other soils.
<br />Trinity soils are somewhat poorly drained. The surface
<br />layer is very dark gray, moderately alkaline clay about 29
<br />inches thick. Between depths of 29 and 72 inches, the
<br />soil is black, moderately alkaline clay.
<br />Kaufman soils are somewhat poorly drained. The sr-
<br />face layer is black, slightly acid clay about 35 inch.
<br />thick. Between depths of 35 and 80 inches, the soil
<br />very dark gray, slightly acid clay that has olive brown ar,u-
<br />dark yellowish brown mottles.
<br />Other soils are Varro and Elbon soils. These soils are
<br />frequently flooded, loamy soils on bottom lands.
<br />Soils in this unit have high potential for pasture and
<br />hay, woodland, and woodland grazing. Potential for
<br />crops 'is medium because of flooding. There is no range
<br />in this unit.
<br />The potential for urban uses and recreation is low
<br />because of flooding, the clayey surface layer, and wet-
<br />ness.
<br />5. Whakana -Porum
<br />Gently sloping to moderately steep, moderately perme-
<br />able to very slowly permeable, loamy soils on uplands
<br />This map unit consists of forested soils that have a
<br />loamy surface layer and a loamy and clayey subsoil.
<br />Slopes are 1 to 20 percent (fig. 4). This unit makes up
<br />about 9 percent of the survey area. It is about 38 per-
<br />cent Whakana soils, 15 percent Porum soils, and 47
<br />percent other soils.
<br />Whakana soils are gently sloping to moderately steep
<br />and are on tops and sides of ridges of high terraces of
<br />major streams. These soils are well drained and moc
<br />ately permeable. The surface layer is brown, medi
<br />acid fine sandy loam about 15 inches thick. Betw(
<br />depths of 15 and 25 inches, the soil is red, very stron -0
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