LOCATION NAHATCHE                TX

Established Series
Rev. DDR:LCB:GLL:JCP:HLH
10/2020

NAHATCHE SERIES

The Nahatche series consists of very deep soils that are formed in stratified loamy alluvium. They are somewhat poorly drained and moderately permeable. These soils occur on flood plains of river valleys. The slope range is 0 to 1 percent. Mean annual precipitation is about 1168 mm (46 in) and the mean annual air temperature is about 19.4 degrees C (67 degrees F).

TAXONOMIC CLASS: Fine-loamy, siliceous, active, nonacid, thermic Aeric Fluvaquents

TYPICAL PEDON: Nahatche clay loam--pasture. (Colors are for moist soil unless otherwise stated.)

A--0 to 20 cm (0 to 8 in) brown (10YR 4/3) clay loam; weak fine and medium subangular blocky structure; very hard, firm; few fine roots; few fine faint dark yellowish brown (10YR 4/4) redox concentrations with diffuse boundaries; many worm casts; moderately acid; clear smooth boundary. (combined A horizons are 8 to 38 cm [3 to 15 in] thick.)

Bg1--20 to 48 cm (8 to 19 in); dark grayish brown (10YR 4/2) clay loam; moderate very fine subangular blocky structure; hard, friable; few fine roots; few fine pores; common medium faint brown (10YR 5/3) and common medium distinct yellowish brown (10YR 5/6) redox concentrations with diffuse boundaries; few fine iron-manganese concretions; moderately acid; clear smooth boundary.

Bg2--48 to 74 cm (19 to 29 in); light brownish gray (10YR 6/2) loam; weak medium subangular blocky structure; hard, friable; few fine roots; few fine pores; many coarse distinct brown (7.5YR 4/4) redox concentrations with diffuse boundaries; few fine iron-manganese concretions; moderately acid; gradual smooth boundary.

Bg3--74 to 124 cm (29 to 49 in); 35 percent light brownish gray (10YR 6/2), 35 percent gray (10YR 6/1), and 30 percent strong brown (7.5YR 5/6) clay loam; moderate medium subangular blocky structure; hard, friable; few fine roots; few fine pores; few fine iron-manganese concretions; moderately acid; gradual wavy boundary.

Bg4--124 to 150 cm (49 to 59 in); gray (10YR 6/1) sandy clay loam; weak medium subangular blocky structure; hard, friable; few fine roots; few fine pores; many coarse prominent strong brown (7.5YR 5/6) redox concentrations with clear boundaries; few thin lenses of sandy material; few iron-manganese concretions; moderately acid; clear wavy boundary. (combined thickness of the Bg horizons are 68 to more than 203 cm [27 to more than 80 in].)

Agb--150 to 211 cm (59 to 83 in); dark gray (10YR 4/1) clay loam; weak coarse blocky structure; extremely hard, very firm; slightly hard; few fine roots; few fine pores; many medium and coarse prominent strong brown (7.5YR 5/6) and yellowish brown (10YR 5/8) redox concentrations with diffuse boundaries; few fine iron-manganese concretions; slightly alkaline.

TYPE LOCATION: Anderson County, Texas; From intersection of Farm Road 319 and State Highway 294 in Elkhart; 1 mile west on State Highway 294; 2.1 miles west on county road; 150 feet north of county road and 20 feet south of Mansons Creek in pasture.

USGS topographic quadrangle: Indian Lake, TX;
Latitude: 31 degrees, 37 minutes, 1.49 seconds N;
Longitude: 95 degrees, 38 minutes, 22.72 seconds W.

Decimal Degrees
Latitude: 31.6170806
Longitude: -95.6396444
Datum: WGS84

UTM Easting: 249600.65 m
UTM Northing: 3501018.46 m
UTM Zone: 15

RANGE IN CHARACTERISTICS:

Solum thickness: more than 203 cm (80 in).
Soil Moisture: Udic Ustic, Udic, and Aquic regimes
Soil Temperature: Thermic and Hyperthermic regimes
Thickness of ochric Epipedon: 8 to 38 cm (3 to 15 in)
Depth to cambic Horizon: 8 to 38 cm (3 to 15 in)
Depth to aquic conditions: 15 to 46 cm (6 to 18 in) from November to May
Depth to endosaturation: 15 to 46 cm (6 to 18 in) from November to May
Depth to redox concentrations: 0 to 38 (0 to 15 in)
Depth to redox depletions: 0 to 38 cm (0 to 15 in)
PSCS: 20 to 30 percent clay
Reaction (pH): moderately acid to slightly alkaline (5.6-7.8) throughout
All or at least one subhorizon in the control section has value of 4 or 5

A horizon:
Hue: 7.5YR to 10YR
Value: 3 to 5, where the value is 3 the horizon is less than 18 cm (7 in) thick
Chroma: 2 or 3
Texture: fine sandy loam, loam, clay loam, or silty clay loam
Redox depletions: 0 to 2 percent; shades of gray
Redox concentrations: 0 to 20 percent; shades of brown
Reaction (pH): strongly acid to slightly alkaline (5.1-7.8)

Bg horizons:
Hue: 7.5YR,10YR, 2.5Y, or N
Value: 4 to 6 moist, 5 to 7 dry
Chroma: 1 or 2
Texture: fine sandy loam, loam, silt loam, sandy clay loam, silty clay loam, or clay loam
Redox depletions: 0 to more than 20 percent; shades of gray
Redox concentrations: 2 to more than 20 percent; shades of red, brown or yellow
Reaction (pH): strongly acid to slightly alkaline (5.1-7.8)
Some pedons have strata or thin subhorizons of fine sandy loam, very fine sandy loam, silt loam, or silty clay loam.

Agb, Bgb, or Cgb horizon (where present):
Hue: 10YR or 2.5Y
Value: 4 to 6, some buried A horizons have a value of 3
Chroma: 1 or 2
Texture: loam, sandy clay loam, silty clay loam, silt loam, or clay loam
Redox concentration: 2 to more than 20 percent; shades of brown or yellow
Reaction (pH): strongly acid to slightly alkaline (5.1-7.8)
Some pedons have strata or thin subhorizons of fine sandy loam, very fine sandy loam, silt loam, or silty clay loam.
Buried horizons below a depth of 75 cm (30 in) are common.

COMPETING SERIES: There are no competing series, closely similar series include the Dreka, Manco, Mantachie, Mathiston, Mattex and Pophers soils.

Dreka, Manco, Mathiston, and Pophers soils: have fine-silty control sections
Manco, Mantachie, Mathiston, Mattex, and Pophers soils: have an acid reaction classes.

GEOGRAPHIC SETTING:

Parent Material: Loamy alluvium derived from mudstone and sandstone
Landscape: river valleys, inland dissected coastal plains, or dissected plains
Landform: treads on floodplains
Microfeature: closed or open depressions (where present)
Slope: 0 to 1 percent
Soil Moisture Regime: Udic and Udic Ustic
Soil Temperature Regime: Thermic
Mean annual precipitation: 915 to 1397 mm (36 to 55 in)
Mean annual air temperature: 17.2to 21.1 degrees C (63 to 70 degrees F)
Frost-free period: 235 to 270 days
Elevation: 30.3 to 204.2 m (100 to 670 ft)
Thornthwaite P-E Index: 62 to 82

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hatliff, Gladewater, Iulus, Manco, Pluck, Robinsonville, Thenas, and Whitesboro series.

Hatliff soils: occur on higher well-drained natural levees and point bars
Iulus soils: have coarse-loamy particle-size control sections and occur on similar or slightly higher flood plain positions
Gladewater soils: are clayey throughout and occur on slightly lower flood plain positions
Manco soils: occur on slightly lower positions and have an acid reaction class
Pluck soils: are Typic Fluvaquents and occur on lower wetter flood plain positions
Robinsonville and Thenas soils: have coarse-loamy control sections and occur on similar or slightly higher flood plain positions
Whitesboro soils: are on higher positions, have thick mollic epipedons, and are moderately well drained

DRAINAGE AND PERMEABILITY:

Drainage class: Somewhat poorly
Permeability class: moderate
Runoff: negligible during summer months with no apparent water table and high during the months of November to May
Flooding: frequent to rarely, for brief to long duration, during the months of November to May
Ponding: none
Seasonal water table: Endosaturation within the depths of 15 to 46 cm (6 to 18 in) of the surface during the months of November to May in most years

USE AND VEGETATION: Most of the soil is used for woodland or pasture. The native vegetation is loblolly pine, shortleaf pine, cypress, American sycamore, water oak, willow oak, cottonwood, sweetgum, southern sweetbay, pecan, and green ash. Herbaceous plants include Virginia wildrye, rusty seed paspalum, beaked panicum, and low panicum. Improved pasture grasses include coastal bermudagrass, and bahiagrass.

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

DISTRIBUTION AND EXTENT:

General location: East and east central Texas
Land Resource Region: Southwestern Prairies Cotton and Forage Region, South Atlantic and Gulf Slope Cash Crops, Forest, and Livestock Region
Major Land Resource Area: Western Coastal Plain (MLRA 133B), Texas Claypan Area MLRA 87), and Texas Blackland Prairies (MLRA 86)
Extent: extensive

SERIES ESTABLISHED: Anderson County, Texas, 1970.

REMARKS: These soils were previously included in the Iuka series.

Diagnostic horizons and features recognized in this pedon include:

Ochric epipedon: 0 to 20 cm (0 to 8 in). (A horizon)

Cambic horizon: 20 to 150 cm (8 to 59 in). (Bg horizons)

Aquic conditions: - 20 to 211 cm (8 to 83 in). (Bg and Agb horizons)

Endosaturation: 20 to 211 cm (8 to 83 in). (Bg and Agb horizons)

Reduced matrix: 20 to 211 cm (8 to 83 in). (Bg and Agb horizons)

Redox concentrations: 0 to 211 cm (0 to 83 in). (A, Bg, and Agb horizons)

Fluventic feature: irregular distribution of organic carbon in the control section, or 0.2 percent or more organic carbon at a depth of 127 cm (50 in) below the soil surface.

Aeric feature: value of 4 or 5 and chroma of 2 with redox concentrations in at least one subhorizon in the control section.

ADDITIONAL DATA: KSSL data from type location S80TX-001-1.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.

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National Cooperative Soil Survey
U.S.A.