LOCATION MONAVILLE TX

Established Series
Rev. ACT-KBH-AKS
07/2019

MONAVILLE SERIES

The Monaville series consists of very deep, well drained, moderately slowly permeable soils that formed in sandy and loamy fluviomarine deposits derived from the Willis Formation of late Pliocene age. These very gently sloping occur on convex low hills on inland dissected coastal plains. Slope ranges from 1 to 3 percent. Mean mean annual precipitation is about 1219 mm (48 in) and mean annual temperature is about 23.3 degrees C (74 degrees F).

TAXONOMIC CLASS: Loamy, siliceous, semiactive, hyperthermic Arenic Plinthic Paleudalfs

TYPICAL PEDON: Monaville loamy fine sand, on a 2 percent convex slope in native pasture. (Colors are for moist soil unless otherwise noted.)

A--0 to 38 cm (0 to 15 in); brown (10YR 4/3) loamy fine sand, pale brown (10YR 6/3) dry; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many fine and medium roots; many fine interstitial pores; strongly acid; clear wavy boundary. (15 to 51 cm [6 to 20 in] thick)

E--38 to 71 cm (15 to 28 in); yellowish brown (10YR 5/4) loamy fine sand, very pale brown (10YR 7/4) dry; single grain; soft, very friable, nonsticky and nonplastic; many fine and medium roots; common fine tubular pores; strongly acid; clear smooth boundary. (20 to 64 cm [8 to 25 in] thick)

Bt--71 to 86 cm (28 to 34 in); light yellowish brown (10YR 6/4) sandy clay loam; light yellowish brown (10YR 6/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; common distinct clay films on faces of peds; strongly acid; gradual wavy boundary. (10 to 51 cm [4 to 20 in] thick)

Btv1--86 to 104 cm (34 to 41 in); pale brown (10YR 6/3) sandy clay loam; moderate medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; common distinct clay films on faces of peds; about 8 percent medium plinthite nodules; 5 percent medium prominent dark red (2.5YR 3/6) and 5 percent medium strong brown (7.5YR 5/8) masses of masses of oxidized iron with sharp boundaries in matrix; strongly acid; gradual wavy boundary. (10 to 51 cm [4 to 20 in] thick)

Btv2--104 to 135 cm (41 to 53 in); dark grayish brown (10YR 4/2) sandy clay loam, moderate medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common distinct clay films on faces of peds; about 10 percent medium plinthite nodules; 10 percent medium prominent dark red (2.5YR 3/6) and 15 percent medium brownish yellow (10YR 6/8) masses of oxidized iron with sharp boundaries in matrix; strongly acid; gradual wavy boundary. (25 to 76 cm [10 to 30 in] thick)

Btv3--135 to 203 cm (53 to 80 in); yellowish brown (10YR 5/8) sandy clay loam; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common faint clay films on faces of peds; about 10 percent medium plinthite nodules; 30 percent coarse prominent dark red (2.5YR 3/6) masses of oxidized iron with sharp boundaries in matrix; 5 percent fine prominent grayish brown (10YR 5/2) iron depletions with sharp boundaries on faces of peds; strongly acid. (combined thickness of Btv horizons ranges from 38 to 191 cm [15 to 75 in])

TYPE LOCATION: Waller County, Texas; from the intersection of U. S. Highway 290 Business and Farm Road 362 in Waller; 2 miles south on Farm Road 362; 0.1 mile west on county road; site is in native pasture 100 feet north of road.

USGS topographic quadrangle: West Waller, Texas;
Latitude: 30 degrees, 01 minutes, 55.3 seconds North
Longitude: 95 degrees, 56 minutes, 41.64 seconds West
Datum: WGS84.

RANGE IN CHARACTERISTICS:
The solum is more than203 cm (80 in) thick.
Soil Moisture: An udic soil moisture regime.
The soil moisture control section, 10 to 30 cm (4 to 12 in) is typically moist from September to July in normal years. The cumulative total number of days the soil moisture control section is dry is less than 90 days.

Mean annual soil temperature: 20.6 to 22.2 degrees C (69 to 72 degrees F).
Depth to argillic horizon: 51 to 102 cm (20 to 40 in)
Depth to redox concentrations: 76 to 122 cm (30 to 48 in)
Depth to redox depletions: 76 to 165 cm (30 to 65 in)
Depth to 5 percent or more plinthite nodules: 56 to 140 cm (22 to 55 in)

Particle-size control section (weighted average)
Clay content: 20 to 35 percent
Ironstone nodules: 0 to 15 percent
CEC/clay ratio: 0.28 to 0.40

Ap or A Horizons
Hue: 7.5YR or 10YR
Value: 3 to 6
Chroma: 3 or 4
Texture: fine sand or loamy fine sand
Reaction: very strongly acid to slightly acid

E Horizon
Hue: 10YR
Value: 4 to 6
Chroma: 3 or 4
Texture: fine sand or loamy fine sand
Reaction: very strongly acid to slightly acid

Bt Horizon
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 4 to 8
Texture: sandy clay loam or loam
Clay content: 20 to 35 percent
Clay films: location-surfaces of peds, contrast-faint or distinct
Redox accumulations: amount-0 to 8 percent, shades-brown, yellow, or red
Redox depletions: amount-0 to 2 percent, shades-gray
Ironstone nodules: 0 to 15 percent
Plinthite nodules: 0 to 5 percent
Reaction: very strongly acid to moderately acid

Btv Horizon
Hue: 7.5YR or 10YR
Value: 4 to 7
Chroma: 4 to 8
Texture: sandy clay loam, loam, clay loam
Clay content: 20 to 35 percent
Clay films: location-surfaces of peds, contrast-faint to prominent
Redox accumulations: amount-20 to 40 percent, shades-brown, yellow, or red
Redox depletions: amount-0 to 2 percent, shades-gray
Ironstone nodules: 3 to 15 percent
Plinthite nodules: 5 to 15 percent
Reaction: very strongly acid to moderately acid

COMPETING SERIES: There are no series in the same family. Similar soils are the Depcor, Larton, Larue, Milby, Newulm, and Wolfpen series.
Depcor series: thermic temperature regime; perched water table at shallower depths
Larton series: thermic temperature regime; active CEC/Clay class
Larue and Wolfpen series: thermic temperature regime
Milby series: do not have plinthite; moderately well drained
Newulm series: Ultisols

GEOGRAPHIC SETTING:
Parent material: sandy and loamy fluviomarine deposits derived from the Willis Formation of late Pliocene age
Landscape: inland dissected coastal plain
Landform: low hills
Slope: 1 to 3 percent
Mean annual air temperature: 19.5 to 20.6 degrees C (67 to 69 degrees F).
Mean annual precipitation: 1016 to 1219 mm (40 to 48 in)
Precipitation Pattern: Precipitation is fairly uniform throughout the year with slight peaks in the spring and fall.
Frost-free period: 240 to 300 days
Elevation: 61 to 98 m (200 to 320 ft)
Thornthwaite annual P-E indices: 62 to 72

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hockley, Kenney, Mockley, Prairieview, Snakecreek, Tomball, and Wockley series.
Hockley series: loamy surface layer on a similar landscape position
Kenney series: a sandy surface layer more than 102 cm (40 in) thick on a slightly higher landscape position
Mockley series: loamy surface layer and a clayey subsoil on a similar landscape position
Prairieview series: loamy surface layer; moderately well drained on a slightly lower landscape position
Snakecreek series: loamy surface layer; somewhat poorly drained; on a lower landscape position
Tomball series: poorly drained in depressions
Wockley series: loamy surface layer; somewhat poorly drained on a lower footslope landscape position

DRAINAGE AND PERMEABILITY:
Drainage class: well
Permeability class: moderately slow
Runoff: medium on 1 to less than 5 percent slopes and high on 5 to 8 percent slopes.
Internal drainage is medium above the horizons containing plinthite and moderately slow in the horizons having plinthite.
Seasonal water table: a perched water table at 1.07 to 1.5 m (3.5 to 5 ft) for short periods in the winter and spring.

USE AND VEGETATION:
Major uses: cropland such as corn, sorghums, peanuts, watermelons and vegetables or pasture
Native vegetation: Andropogons, Paspalums, and Panicums.
Ecological site: R150AY543TX - Sandy Prairie 25-35" PZ.

DISTRIBUTION AND EXTENT:
General area: Southeastern Texas; mainly along the interior margin of the Coastal Prairie
Land Resource Region: T (Atlantic and Gulf Coast Lowland Forest and Crop Region)
Major Land Resource Region: 150A (Gulf Coast Prairies)
Extent: medium

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

SERIES ESTABLISHED: Waller County, Texas, 1981. The name is for a small community in Waller County.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 71 to 122 cm (28 to 48 in) (Bt, Btv1, and Btv2 horizon)
Ochric epipedon: 0 to 71 cm (0 to 28 in) (A horizon)
Argillic horizon: 71 to 188 cm (28 to 74 in) (Bt and Btv horizons)
Arenic feature: Sandy surface layer from the surface to 71 cm (28 in)
Plinthic feature: 8 to 10 percent plinthite from 86 to 188 cm (34 to 74 in) (Btv horizons)

Additional Comments: These soils were formerly included in the Hockley series. The series was revised in January 2001 as part of the MLRA 150A update. Classification was changed from an active to semiactive CEC/Clay class.

The assignment of the cation-exchange activity class is inferred from lab data from soils with similar parent material taken from Austin, Waller, and Harris Counties.

ADDITIONAL DATA: None

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

National Cooperative Soil Survey
U.S.A.