LOCATION CHESTERVILLE TX

Established Series
JKW-RM
08/2017

CHESTERVILLE SERIES

The Chesterville series consists of very deep, well drained, moderately permeable soils that formed in loamy fluviomarine deposits derived from igneous, metamorphic and sedimentary rock of the Lissie Formation. These nearly level to very gently sloping soils are pimple mounds on flats on coastal plains. Slope ranges from 1 to 5 percent from the top of the mound to the base which is about 15 m (50 ft). Mean annual air temperature is about 21 degrees C (69 degrees F) and mean annual precipitation is about 1092 mm (43 in).

TAXONOMIC CLASS: Fine-loamy, siliceous, superactive, hyperthermic Typic Hapludalfs

TYPICAL PEDON: Chesterville fine sandy loam, in an area of Cyfair-Chesterville complex, 0 to 1 percent slopes; elevation is 47.2 m (152 ft) (Colors are for moist soil unless otherwise stated.)

A1--0 to 25 cm (0 to 10 in); dark yellowish brown (10YR 4/4) fine sandy loam; weak fine subangular blocky structure; very friable; common fine roots and common very fine roots; common fine and medium interstitial pores; electrical conductivity of 0.6 decisiemens per meter by EC meter, saturated paste; sodium adsorption ratio of 0.6; moderately acid, pH 5.6, pH meter; clear smooth boundary.

A2--25 to 50 cm (10 to 20 in); yellowish brown (10YR 5/4) fine sandy loam; weak fine subangular blocky structure; very friable; common very fine roots; common fine interstitial pores; electrical conductivity of 0.8 decisiemens per meter by EC meter, saturated paste; sodium adsorption ratio of 0.9; strongly acid, pH 5.4, pH meter; clear smooth boundary. (Combined thickness of the A1 and A2 horizons is 41 to 90 cm [16 to 35 in])

E--50 to 74 cm (20 to 29 in); light yellowish brown (10YR 6/4) fine sandy loam; 10 percent clay; weak fine subangular blocky structure; very friable; common very fine roots; common very fine tubular pores; 2 percent fine distinct yellowish brown (10YR 5/6) masses of oxidized iron with sharp boundaries in matrix; electrical conductivity of 1.3 decisiemens per meter by EC meter, saturated paste; sodium adsorption ratio of 3.4; strongly acid, pH 5.4, pH meter; abrupt smooth boundary. (0 to 26 cm [0 to 10 in] thick)

Bt1--74 to 110 cm (29 to 43 in); grayish brown (10YR 5/2) clay loam; moderate medium prismatic structure parts to moderate medium angular blocky; very firm; few very fine roots; few very fine tubular pores; 5 percent distinct clay films; 1 percent fine distinct weakly cemented black (10YR 2/1) iron-manganese masses with sharp boundaries in matrix and 3 percent fine prominent strong brown (7.5YR 4/6), moist, masses of oxidized iron with sharp boundaries in matrix and 20 percent medium distinct yellowish brown (10YR 5/6) masses of oxidized iron with clear boundaries in matrix; electrical conductivity of 0.4 decisiemens per meter by EC meter, saturated paste; sodium adsorption ratio of 3.2; strongly acid, pH 5.2, pH meter; gradual wavy boundary.

Bt2--110 to 169 cm (43 to 66 in); light brownish gray (10YR 6/2) clay loam; moderate coarse prismatic structure parts to moderate coarse angular blocky; firm; few very fine roots; few very fine tubular pores; 10 percent distinct clay films; 5 percent fine distinct weakly cemented black (10YR 2/1) iron-manganese masses with sharp boundaries in matrix and 8 percent fine prominent strong brown (7.5YR 5/6), moist, masses of oxidized iron with sharp boundaries in matrix and 10 percent medium distinct yellowish brown (10YR 5/6) masses of oxidized iron with clear boundaries in matrix; electrical conductivity of 0.6 decisiemens per meter by EC meter, saturated paste; sodium adsorption ratio of 6.3; slightly acid, pH 6.1, pH meter; gradual wavy boundary. (Combined thickness of the Bt horizons is 84 to 156 cm [33 to 62 in])

Bt3--169 to 203 cm (66 to 80 in); light gray (2.5Y 7/2) clay loam; moderate coarse prismatic structure parts to moderate coarse angular blocky; firm; few very fine roots; 3 percent distinct pale brown (10YR 6/3) sand coats on vertical faces of peds and 15 percent distinct clay films; 5 percent fine distinct weakly cemented black (10YR 2/1) iron-manganese masses with sharp boundaries in matrix and 10 percent medium distinct dark yellowish brown (10YR 4/6) masses of oxidized iron with clear boundaries in matrix; electrical conductivity of 0.8 decisiemens per meter by EC meter,saturated paste; sodium adsorption ratio of 9.9; slightly acid, pH 6.5, pH meter.

TYPE LOCATION:
Colorado County, TX; from the intersection of FM 2764 and FM 1093 in Chesterville, about 1.2 miles east on FM 1093 to private ranch road; 2.2 miles northwest on ranch road to intersection with ranch road; 0.65 mile north, then 0.55 mile east; located about 800 feet southeast on pimple mound in pasture land.

USGS topographic quadrangle: Rexville, TX
Latitude: 29 degrees, 38 minutes, 21.81 seconds N
Longitude: 96 degrees, 11 minutes, 57 seconds W
Datum: WGS84

RANGE IN CHARACTERISTICS:
Soil Moisture: An Udic soil moisture regime. The soil moisture control section is
moist in some or all parts for more than 275 days in normal years.
Mean annual soil temperature: 21.7 to 22.2 degrees C (71 to 72 degrees F)
Particle-size control section (weighted average):
Total clay content: 23 to 33 percent

A horizon:
Hue: 10YR
Value: 3 to 5 (areas with value of 3 and chroma 2 or 3 are less than 25 cm [10
in] thick)
Chroma: 2 to 4
Texture: loamy sand, loamy fine sand, fine sandy loam
Total clay content: 3 to 13 percent
Sand content: 57 to 81 percent
Redox concentrations: amount-0 to 5 percent; color-shades of brown
Iron-manganese concentrations: amount-0 to 2 percent; kind-masses
Electrical conductivity (decisiemens per meter): 0.1 to 1.05.1
Sodium adsorption ratio: 0 to 1
Reaction (pH): very strongly acid to moderately acid (4.5 - 6.0)

E horizon:
Hue: 10YR or 7.5YR
Value: 5 to 7
Chroma: 2 to 4
Texture: loamy sand, loamy fine sand, fine sandy loam
Total clay content: 3 to 13 percent
Sand content: 55 to 83 percent
Redox concentrations: amount-0 to 6 percent; shades of brown, yellow, or red;
brown
Redox depletions: amount-0 to 5 percent; color-shades of gray;
Iron-manganese concentrations: amount-0 to 2 percent; kind-masses
Rock fragments: amount-0 to 2; size-2 to 20 mm; kind-silica concretions
Electrical conductivity (decisiemens per meter): 0.1 to 1.5
Sodium adsorption ratio: 0 to 2
Reaction (pH): strongly acid or moderately acid (5.1 - 6.0)

Bt horizon (upper part):
Hue: 10YR
Value: 6 to 8
Chroma: 1 or 2 (some pedons have a variegated matrix with brown, red, yellow,and
gray colors)
Texture: sandy clay loam or clay loam
Total clay content: 21 to 35 percent
Sand content: 40 to 70 percent
Redox concentrations: amount-10 to 45 percent; shades of brown, yellow, or red
Redox depletions: amount-0 to 5 percent; color-shades of gray;
Iron-manganese concentrations: amount-0 to 5; kind-nodules, concretions, or
masses
Rock fragments: amount-0 to 2 percent; size-2 to 20 mm; kind-silica concretions
Electrical conductivity (decisiemens per meter): 0.1 to 1.0
Sodium adsorption ratio: 0 to 6
Reaction (pH): strongly acid to slightly acid (5.1 - 6.5)

Bt horizon (lower part)
Hue: 10YR or 2.5Y
Value: 5 to 7
Chroma: 1 or 2(some pedons have a variegated matrix with brown, red, yellow, and
gray colors)
Texture: sandy clay loam or clay loam
Total clay content: 23 to 35 percent
Sand content: 40 to 70 percent
Redox concentrations: amount-5 to 35 percent; shades of brown, yellow, or red
(red redox concentrations are less than 20 percent)
Redox depletions: amount-0 to 5 percent; color-shades of gray;
Iron-manganese concentrations: amount-0 to 5; kind-nodules, concretions, or Rock
masses
fragments: amount-0 to 2 percent; size-2 to 20 mm; kind-silica concretions
Identifiable secondary carbonate: amount-0 to 2; kind-nodules;
Electrical conductivity (decisiemens per meter): 0.1 to 1.0
Sodium adsorption ratio: 0 to 10
Reaction (pH): strongly acid to neutral (5.1 - 7.3)

COMPETING SERIES:
There are no series in the same family. Similar soils are the Alto, Austonio,
Fulshear, and Katy series, and the Cyfair (T) series.
Alto, Austonio, and Fulshear soils: thermic soil temperature regime; active CEC
to clay class
Katy soils: many coarse red redoximorphic features in the lower part of the
argillic horizon; active CEC/clay class
Cyfair soils: have oxyaquic conditions; active CEC/clay class

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits derived from the Lissie Formation
Landscape: coastal plains
Landform: flats
Microfeature: pimple mound
Slope: 1 to 5 percent from the top of the mound to the base which is about
15 m (50 ft).
Precipitation Pattern: Rainfall is fairly uniform throughout the year with slight
peaks during the spring and fall months.
Mean annual precipitation: 1092 to 1219 mm (43 to 48 in)
Thornthwaite P-E Index: 56 to 68
Mean annual air temperature: 19.5 to 20.6 degrees C (67 to 69 degrees F)
Frost-free period: 271 to 300 days
Elevation: 43 to 76 m (140 to 225 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Cyfair, Edco, Gessner, and Telf series.
Cyfair soils: somewhat poorly drained; on flat as in complex with Chesterville
soils as the areas between the mounds
Edco soils: clayey subsoil; on flats
Gessner soils: ponded oval depressions
Telf soils: moderately well drained; clayey subsoil; on flats

DRAINAGE AND PERMEABILITY:
Drainage class: well drained
Permeability class: moderate
Runoff: very low
Flooding: none
Ponding: none
Seasonal water table: none

USE AND VEGETATION:
Used primarily as improved pasture land. Some areas are in native range land Native vegetation consists of bluestems and other bunch grasses.

DISTRIBUTION AND EXTENT:
General area: Gulf Coast Prairie of Texas from the Colorado River system to the
Brazos River system
Land Resource Region: T (Atlantic and Gulf Coast Lowland Forest and Crop Region)
MLRA - 150A (Gulf Coast Prairies)
Extent - small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Colorado County, Texas, 2017. The name is from a community near
the type location.

REMARKS: The series was formerly included in the Katy and Telf series. The series
was separated based on geomorphic position.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 74 to 124 cm (29 to 49 in)
Ochric epipedon: 0 to 74 cm (0 to 29 in) (A1, A2, E horizons)
Argillic horizon: 74 to 203 cm (29 to 80 in) (Bt1, Bt2, and Bt3 horizons)

Additional Comments: The assignment of the cation-exchange activity class is from
supported by soil survey office laboratory data on pedon number S2017TX089400
Colorado County, Texas.

ADDITIONAL DATA: Particle-size analysis, salinity and sodicity tests were
performed at the project office on 8 pedons.

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

National Cooperative Soil Survey
U.S.A.