LOCATION LEWISVILLE TX
Established Series
Rev. CLN-RM-JAW
02/2018
LEWISVILLE SERIES
The Lewisville series consists of very deep, well drained, moderately permeable soils that formed in ancient loamy and clayey calcareous sediments. These upland soils have slopes of 0 to 10 percent. Mean annual precipitation is about 914 mm (35.98 in.) and the mean annual air temperature is about 19 degrees C (65 degrees F).
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Udic Calciustolls
TYPICAL PEDON: Lewisville silty clay--pasture. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 15 cm (0 to 6 in); dark grayish brown (10YR 4/2) silty clay; very dark grayish brown (10YR 3/2) moist; moderate very fine subangular blocky and granular structure; hard, friable; contains a few strongly cemented calcium carbonate concretions; calcareous; moderately alkaline; abrupt smooth boundary. (Thickness of the Ap horizon is 0 to 18 cm [0 to 7 in])
A--15 to 41 cm (6 to 16 in); dark grayish brown (10YR 4/2) silty clay, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; hard, firm; few root channels; common strongly cemented calcium carbonate concretions about 2 to 5 mm in diameter; calcareous; moderately alkaline; gradual smooth boundary. (Thickness of the A horizon is 18 to 38 cm [7 to 15 in])
Bk1--41 to 86 cm (16 to 34 in); grayish brown (10YR 5/2) silty clay, dark grayish brown (10YR 4/2) moist; moderate fine subangular blocky structure; very hard, firm; common strongly cemented calcium carbonate concretions 2 to 5 mm in diameter; a few threads of soft calcium carbonate; calcareous; moderately alkaline; gradual smooth boundary. (Thickness of the Bk1 horizon is 33 to 76 cm [13 to 30 in])
Bk2--86 to 157 cm (34 to 62 in); pale brown (10YR 6/3) silty clay; brown (10YR 5/3) moist; weak subangular blocky structure; hard, firm; common soft masses of segregated calcium carbonate, few small, strongly cemented calcium carbonate concretions; calcareous; moderately alkaline.
TYPE LOCATION: Collin County, Texas; from the intersection of Farm Road 546 and Texas Highway 75 in McKinney, 5 miles southeast on Farm Road 546, 1.2 miles south on county road, 60 ft east in pasture. USGS topographic quadrangle: McKinney East, TX;
Latitude: 33 degrees 08 minutes 00.6 seconds N;
Longitude: 96 degrees 33 minutes 24.7 seconds W.
Datum: WGS84.
RANGE IN CHARACTERISTICS:
Solum depth: ranges from 152 to 203 cm (60 to 80 in).
Soil moisture: An Udic-ustic soil moisture regime. The soil moisture control section is dry in some part for four-tenths or less of the cumulative days in normal years.
Thickness of mollic epipedon: 25 to 51 cm (10 to 20 in)
Depth to calcic horizon: 25 to 51 cm (10 to 20 in) (Bk horizons)
Depth to secondary calcium carbonates: 0 to 51 cm (0 to 20 in)
Reaction (pH): moderately alkaline (7.9 - 8.4) throughout
Particle-size control section (weighted average)
Silicate Clay content: 24 to 35 percent
Calcium carbonate equivalent: 20 to 40 percent
A or Ap horizon:
Hue: 7.5YR and 10YR
Value: 2 to 5
Chroma: 2 to 3.
Texture: silty clay, clay, clay loam
Rock fragments: 0 to 6 percent; 2 to 75; quartzite and shell fragments
Identifiable secondary carbonates: 0 to 5 percent, fine and medium (1 to 5 mm), carbonate concretions
Bk horizon (Upper part):
Hue: 2.5Y to 7.5YR
Value: 4 to 7
Chroma: 2 to 4
Texture: dominantly silty clay, but includes clay, clay loam, silty clay loam
Rock fragments: 0 to 6 percent; 2 to 75; quartzite and shell fragments
Identifiable secondary carbonates: 1 to 25 percent, fine and medium (1 to 5 mm), carbonate concretions
Bk horizon (Lower part):
Hue: 2.5Y to 5YR
Value: 4 to 8
Chroma: 2 to 6
Texture: silty clay, clay, silty clay loam, clay loam
Rock fragments: 0 to 14 percent; 2 to 75; quartzite and shell fragments
Identifiable secondary carbonates: 1 to 25 percent, fine to coarse, carbonate concretions and soft masses
Some pedons are underlain at depths of 0.9 to 4.6 m (3 to 15 ft) by sediments containing 15 to 50 percent gravel.
COMPETING SERIES: There are no other series in this family. Similar series are the
Altoga,
Austin,
Nuvalde,
Venus, and
Volente series
Altoga and
Austin soils: have more than 40 percent calcium carbonate equivalent in the control section, in addition, Altoga soils do not have mollic epipedons
Nuvalde soils: are dry in the moisture control section for longer periods.
Venus soils: have fine-loamy control sections
Volente soils: have more than 35 percent silicate clay content in the control section
GEOGRAPHIC SETTING:
Parent material: loamy and clayey alluvium
Landscape: river valley
Landform: stream terraces
Slope: 0 to 10 percent, but they are mostly 2 to 6 percent
Mean annual precipitation: 711 to 1117 mm (28 to 44 in)
Thornthwaite P-E Index: 44 to 66
Mean annual air temperature: 16 to 21 degrees C (61 to 70 degrees F)
Frost-free period: 230 to 274 days
Elevation: 72 to 487.7 m (236 to 1600 ft)
GEOGRAPHICALLY ASSOCIATED SOILS: These include the competing
Altoga,
Venus, and
Volente series and
Eddy,
Krum, and
Stephen series.
Altoga,
Eddy, and
Stephen soils: occur on erosional surfaces at higher elevations. In addition, Eddy and Stephen soils are less than 51 cm (20 in) thick and are underlain by chalk or weakly cemented limestone. Also, Eddy soils contain more than 35 percent by volume of coarse fragments.
Krum,
Venus, and
Volente soils: occur at lower elevations as stream terraces or lower portions of narrow valleys. In addition, Krum soils have clayey control sections and vertic features of cracking widely and deeply when dry.
DRAINAGE AND PERMEABILITY:
Drainage class: Well;
Permeability class: Moderate.
Runoff: negligible on slopes less than 1 percent; low on slopes of 1 to 5 percent; and medium on slopes of 5 to 10 percent;
USE AND VEGETATION: Mostly cultivated, mainly to small grains. Originally vegetation was mid and tall grasses and a few widely separated elm, hackberry, and mesquite trees.
DISTRIBUTION AND EXTENT: Mainly in Texas, along major streams in the Blackland Prairies and the Grand Prairie; possibly in Oklahoma (MLRA 86 A and B, and MLRA 85). The series is of large extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Denton County, Texas; 1918.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 41 cm (0 to 16 in), the (Ap and A horizons)
Calcic horizon: 41 to 157 cm (16 to 62 in), the (Bk horizons)
Secondary carbonates: 0 to 157 cm (0 to 62 in.) the (Ap, A, and Bk hoizons)
ADDITIONAL DATA:
Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014.
National Cooperative Soil Survey
U.S.A.