LOCATION CYFAIR                  TX

Established Series
SAK-JKW-RM
08/2018

CYFAIR SERIES

The Cyfair series consists of very deep, somewhat poorly drained, slowly permeable soils that formed in loamy sediments derived from the Lissie Formation of Pleistocene age. These nearly level soils are on coastal prairies. Slope ranges from 0 to 1 percent, but most are less than 0.5 percent due to leveling. Mean annual temperature is about 20 degrees C (68 degrees F), and mean annual precipitation is about 1118 mm (44 in).

TAXONOMIC CLASS: Fine-loamy, siliceous, active, hyperthermic Oxyaquic Hapludalfs

TYPICAL PEDON: Cyfair fine sandy loam; elevation is 51.0 m (167 ft) (Colors are for moist soil unless otherwise stated.)

A--0 to 21 cm (0 to 9 in); dark grayish brown (10YR 4/2) fine sandy loam; weak fine subangular blocky structure; friable; common fine roots throughout and many very fine roots throughout; common fine interstitial and many very fine interstitial pores; 6 percent fine prominent dark yellowish brown (10YR 4/6), moist, masses of oxidized iron with sharp boundaries lining pores; electrical conductivity of 0.3 decisiemens per meter by EC meter, saturated paste; strongly acid, pH 5.4, pH meter; gradual smooth boundary.(11 to 41 cm [4 to 16 in] thick)

E--21 to 45 cm (9 to 18 in); light brownish gray (10YR 6/2) fine sandy loam; weak fine subangular blocky structure; friable; common very fine roots throughout; common very fine tubular pores; electrical conductivity of 0.2 decisiemens per meter by EC meter, saturated paste; very strongly acid, pH 5.0, pH meter; clear smooth boundary. (13 to 37 cm [5 to 14 in] thick)

Bt1--45 to 101 cm (18 to 40 in); gray (10YR 5/1) clay loam; moderate medium subangular blocky structure; firm; common very fine roots throughout; common very fine tubular pores; 12 percent clay films; 12 percent medium distinct brownish yellow (10YR 6/6), moist, masses of oxidized iron with sharp boundaries lining pores; electrical conductivity of 0.2 decisiemens per meter by EC meter, saturated paste; very strongly acid, pH 5.0, pH meter; gradual wavy boundary.

Bt2--101 to 156 cm (40 to 62 in); gray (10YR 5/1) clay loam; moderate medium prismatic structure parts to moderate medium subangular blocky structure; firm; common very fine roots throughout; common very fine tubular pores; 10 percent clay films; 4 percent iron-manganese masses and 6 percent medium faint gray (N 6/), moist, masses of reduced iron with sharp boundaries in matrix and 6 percent fine prominent brownish yellow (10YR 6/6), moist, iron depletions with clear boundaries in matrix; electrical conductivity of 0.2 decisiemens per meter by EC meter, saturated paste; strongly acid, pH 5.3, pH meter; gradual smooth boundary.

Bt3--156 to 182 cm (62 to 72 in); gray (10YR 6/1) clay loam; moderate medium prismatic structure parts to moderate medium subangular blocky structure; firm; common very fine roots throughout; 10 percent clay films; 3 percent iron-manganese masses and 5 percent medium faint gray (N 6/), moist, masses of reduced iron with sharp boundaries in matrix and 10 percent fine prominent brownish yellow (10YR 6/6), moist, iron depletions with clear boundaries in matrix; 1 percent fine carbonate nodules; electrical conductivity of 0.3 decisiemens per meter by EC meter, saturated paste; moderately acid, pH 5.7, pH meter; clear smooth boundary. (Combined thickness of the Bt horizons is 92 to 148 cm [36 to 58 in])

Bt4--182 to 203 cm (72 to 80 in); gray (10YR 6/1) sandy clay loam; moderate medium prismatic structure parts to moderate medium subangular blocky structure; firm; 5 percent clay films; 4 percent manganese masses and 5 percent medium prominent gray (N 6/), moist, masses of reduced iron with sharp boundaries in matrix and 10 percent fine prominent brownish yellow (10YR 6/6), moist, iron depletions with clear boundaries in matrix; 3 percent fine carbonate nodules; electrical conductivity of 0.3 decisiemens per meter by EC meter, saturated paste; slightly acid, pH 6.2, pH meter.

TYPE LOCATION:
Austin County, TX; from the intersection of Texas Highway 36 and FM 3013; about 8.1 miles southwest on FM 3013; 0.14 mile west on private ranch road; 150 feet southwest in pasture land.

USGS topographic quadrangle: Rexville, TX
Latitude: 29 degrees, 39 minutes, 54.92 seconds N
Longitude: 96 degrees, 14 minutes, 32.76 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: 27 to 33 percent

A horizon (Ap where present):
Hue: 10YR
Value: 4 to 6
Chroma: 1 to 3
Texture: fine sandy loam or loam
Total clay content: 9 to 22 percent
Redox concentrations: amount-1 to 10 percent; color-shades of brown;
Iron-manganese concentrations: amount-0 to 10 percent; kind-masses; color-shades
of black or brown
Electrical conductivity (dS/m): 0.1 to 1.0
Sodium adsorption ratio: 0 to 2
Reaction (pH): strongly acid to slightly acid (5.1 - 6.5)

E horizon:
Hue: 10YR
Value: 4 to 7
Chroma: 1 to 4
Texture: fine sandy loam or loam
Total clay content: 9 to 22 percent
Redox concentrations: amount-1 to 20 percent; color-shades of brown, red, or
yellow
Redox depletions: amount-0 to 2 percent; color-shades of gray
Iron-manganese concentrations: amount-0 to 10 percent; kind-masses; color-shades
of black or brown
Electrical conductivity (dS/m): 0.1 to 1.1
Sodium adsorption ratio: 0 to 4
Reaction (pH): very strongly acid to slightly acid (4.5 - 6.5)

Bt horizon (upper part):
Hue: 10YR or 2.5Y
Value: 4 to 7
Chroma: 1 or 2
Texture: loam, sandy clay loam, or clay loam
Total clay content: 21 to 35 percent
Redox concentrations: amount-5 to 45 percent; color-shades of brown, red, or
yellow (red redox concentrations are less than 20 percent)
Redox depletions: amount-0 to 10 percent; color-shades of gray
Iron-manganese concentrations: amount-0 to 5 percent; kind-masses or nodules
Electrical conductivity (dS/m): 0.1 to 2.0
Sodium adsorption ratio: 0 to 6
Reaction (pH): very strongly acid to slightly acid (4.5 - 6.5)

Bt horizon (lower part):
Hue: 10YR or 2.5Y
Value: 6 to 8
Chroma: 1 or 2
Texture: loam, sandy clay loam, or clay loam
Total clay content: 23 to 33 percent
Redox concentrations: amount-5 to 45 percent; color-shades of brown, red, or
yellow (red redox concentrations are less than 20 percent)
Redox depletions: amount-0 to 10 percent; color-shades of gray
Iron-manganese concentrations: amount-0 to 5 percent; kind-masses or nodules
Identifiable secondary carbonate: amount-0 to 2 percent; kind-nodules or
concretions
Electrical conductivity (dS/m): 0.1 to 2
Sodium adsorption ratio: 0 to 6
Reaction (pH): slightly acid to slightly alkaline (6.1 - 7.8)

COMPETING SERIES:
These are the Nada series in the same family. Similar soils are the Edco, Katy,
Morales, Snakecreek, and Wyick series.
Nada soils: do not have an E horizon; are moderately well drained
Edco soils: in a fine family
Katy soils: have many coarse red redox concentrations in the lower part of the
argillic horizon; are moderately well drained
Morales soils: have a glossic horizon
Snakecreek soils: have aquic conditions
Wyick soils: in and ustic soil moisture regime

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits derived from the Lissie Formation
Landscape: coastal plains
Landform: flats
Slope: 0 to 1 percent.
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 Chesterville (T), Edco, Gessner, and Telf series.
Chesterville soils: are on pimple mounds; are well drained
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: somewhat poorly
Permeability class: slow
Runoff: high
Flooding: none
Ponding: none
Wetness: seasonal water table as result of episaturation that occurs between depths of 30 to 91 cm (12 to 36 in) of the surface during the months of January through April in normal years.

USE AND VEGETATION:
Used primarily for pasture land. Some areas are in cropland. Native vegetation consists of mostly bluestems and paspalums. Rice is the dominant crop.

DISTRIBUTION AND EXTENT:
General area: Gulf Coast Prairie of Texas generally east of the Colorado River
system on the Katy Prairie
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: Austin County, Texas, 2017. The name is coined but refers to the
Cypress-Fairbanks area in Harris County, Texas.

REMARKS: The series was formerly included in the Aris and Katy series. Aris soils
have aquic conditions. Katy soils are better drained.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 45 to 95 cm (18 to 38 in)
Ochric epipedon: 0 to 45 cm (0 to 18 in) (A and E horizons)
Argillic horizon: 45 to 203 cm (18 to 80 in) (Bt1, Bt2, Bt3, and Bt4 horizons)

Additional Comments: The assignment of the cation-exchange activity class is
supported by laboratory data number S2017TX0152005 from Austin County, Texas.

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

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

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National Cooperative Soil Survey
U.S.A.