LOCATION PRAIRIELAND LA

Established Series
JKW-RM
04/2016

PRAIRIELAND SERIES

The Prairieland series consists of very deep, poorly drained, slowly permeable soils that formed in loamy fluviomarine deposits of late Pleistocene age. These nearly level soils occur on drainageways on broad flats on coastal plains. Slope ranges from 0 to 1 percent but mainly less than 0.5 percent. Mean annual precipitation is about 1524 mm (60 in), and mean annual air temperature is about 20 degrees C (68 degrees F).

TAXONOMIC CLASS: Fine-silty, siliceous, active, thermic Typic Glossaqualfs

TYPICAL PEDON: Prairieland silt loam, in cropland; (Colors are for moist soil unless otherwise stated.)

Ap1--0 to 10 cm, (0 to 4 in); gray (10YR 5/1) silt loam; weak fine granular structure; very friable; many very fine, fine and medium roots; many fine interstitial pores; strongly acid (pH 5.2); clear smooth boundary.

Ap2--10 to 22 cm, (4 to 9 in); dark gray (10YR 4/1) silt loam; weak fine subangular blocky structure; very friable; common very fine and fine roots; many fine dendritic tubular pores; 10 percent patches of light gray (10YR 7/1) silt loam (E material); strongly acid (pH 5.5); clear smooth boundary. (Combined thickness of the Ap horizon is 8 to 43 cm [3 to 17 in].)

Eg--22 to 34 cm, (9 to 13 in); light brownish gray (10YR 6/2) silt loam; weak fine subangular blocky structure; very friable; common very fine roots; common very fine dendritic tubular pores; 5 percent fine prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; strongly acid (pH 5.4); clear smooth boundary. (Combined thickness of the Eg horizon is 5 to 71 cm [2 to 28 in].)

Btg/Eg--34 to 60 cm, (13 to 24 in); about 75 percent light brownish gray (10YR 6/2) loam (Btg), about 25 percent tongues of light gray (10YR 7/1) loam (Eg); weak medium subangular blocky structure; friable; common very fine roots; common very fine dendritic tubular pores; 30 percent gray (10YR 5/1), moist, clay films on all faces of peds; 10 percent fine prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; strongly acid (pH 5.3); clear wavy boundary. (Combined thickness of the Btg/Eg horizon is 10 to 81 cm [4 to 32].)

Btg1--60 to 95 cm, (24 to 37 in); light brownish gray (2.5Y 6/2) loam; weak fine prismatic parts to weak medium subangular blocky structure; firm; 30 percent gray (10YR 5/1), moist, clay films on all faces of peds; 10 percent medium prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix and 10 percent coarse prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; 5 percent light gray (10YR 7/1) E material; strongly acid (pH 5.5); gradual wavy boundary.

Btg2--95 to 120 cm, (37 to 47 in); light brownish gray (2.5Y 6/2) clay loam; weak fine prismatic parts to weak medium subangular blocky structure; very firm; 60 percent gray (10YR 5/1), moist, clay films; 1 percent medium iron-manganese masses and 15 percent coarse prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix and 10 percent medium prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; moderately acid (pH 5.8); gradual wavy boundary.

Btg3--120 to 150 cm, (47 to 59 inches); light gray (2.5Y 7/2) clay loam; weak medium subangular blocky structure; very firm; 30 percent gray (10YR 5/1), moist, clay films; 1 percent medium iron-manganese masses and 10 percent fine distinct yellowish brown (10YR 5/4), moist, masses of oxidized iron in matrix and 15 percent medium prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; moderately acid (pH 6.0); clear wavy boundary.

Btg4--150 to 185 cm, (59 to 73 in); gray (2.5Y 6/1) silty clay loam; moderate coarse subangular blocky structure; firm; 5 percent gray (10YR 5/1), moist, clay films; 2 percent medium manganese masses and 30 percent coarse prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron in matrix; slightly acid (pH 6.2); gradual wavy boundary.

Btg5--185 to 203 cm, (73 to 80 inches); gray (2.5Y 6/1) silty clay loam; weak fine subangular blocky structure; firm; 5 percent gray (10YR 5/1), moist, clay films; 5 percent medium iron-manganese masses and 15 percent coarse prominent strong brown (7.5YR 5/6), moist, masses of oxidized iron in matrix and 15 percent coarse prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron; neutral (pH 6.6). (Combined thickness of the Btg horizon is 110 to 185 cm.)

TYPE LOCATION: Calcasieu Parish, LA; about 5 miles south of Holmwood; from the intersection of LA Highway 14 and LA Highway 27, 5.0 miles south on LA Highway 27, 500 ft west in cropland. USGS topographic quadrangle: Sulphur, LA; Latitude: 30 degrees, 03 minutes, 14.2 seconds N; Longitude: 93 degrees, 04 minutes, 53.8 seconds W; Datum: NAD83.

RANGE IN CHARACTERISTICS:
Solum thickness is more than 203 cm (80 in)
Soil Moisture: An aquic soil moisture regime.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Particle-size control section (weighted average)
Clay content: 20 to 30 percent
Sand content: 10 to 40 percent
Sand coarser than very fine sand: 5 to 12 percent

Ap Horizons:
Hue: 10YR
Value: 4 or 5
Chroma: 1 or 2
Texture: silt loam, loam, or very fine sandy loam
Redox concentrations: amount-0 to 8 percent, shades-yellow or brown
Redox depletions: amount-0 to 5 percent, shades-gray
Reaction: strongly acid to slightly acid (5.1 to 6.5)

Eg Horizon:
Hue: 10YR or 2.5Y
Value: 4 to 7
Chroma: 1 or 2
Texture: silt loam, loam, or very fine sandy loam
Redox concentrations: amount-2 to 15 percent, shades-yellow or brown
Redox depletions: amount-0 to 5 percent, shades-gray
Reaction: very strongly acid to slightly acid (4.5 to 6.5)

Btg/Eg Horizon:
Btg part
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 1 or 2
Eg part which occurs as albic material that penetrates the Btg part
Hue: 10YR or 2.5Y
Value: 5 to 8
Chroma: 1 or 2
Texture: Btg part is silty clay loam, clay loam, or loam; Eg part is silt loam, loam or very fine sandy loam; overall texture is silt loam, loam, silty clay loam, or clay loam
Redox concentrations: amount-5 to 25 percent, shades- yellow or brown
Redox depletions: amount-0 to 5 percent, shades-gray
Reaction: very strongly acid to slightly acid (4.5 to 6.5)

Btg Horizons:
Hue: 10YR or 2.5Y
Value: Value: 4 to 7
Chroma: 1 or 2
Texture: silty clay loam, clay loam, loam or silty clay
Redox concentrations: amount-10 to 35 percent, shades-brown or yellow
Redox depletions: amount-0 to 10 percent, shades-gray
Iron-manganese concentrations: amount-0 to 5 percent size; kind-masses
Reaction: very strongly acid to neutral (4.5 to 7.3)

COMPETING SERIES: These are the Alikchi, Caddo, Caneyhead, Evadale, Guyton, Kinder series in the same family.
Alikchi soils: formed in silty material over shale of Pennsylvanian age
Caddo soils: have plinthite
Caneyhead soils: very poorly drained; have glossic horizon that extends throughout the argillic horizon
Evadale soils: have red redox concentrations in the argillic horizon; have an Eg/Btg horizon
Guyton soils: have a C layer starting at 178 cm (70 in) from the surface;
Kinder soils: have a BCg horizon starting at 137 cm (54 in); have red redox concentrations in the argillic horizon

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits of late Pleistocene age
Landscape: coastal plains
Landform: drainageways on broad flats
Slope: 0 to 1 percent but mainly less than 0.5 percent
Mean annual precipitation: 1397 to 1651 mm (55 to 65 in)
Precipitation Pattern: uniform throughout the year
Mean annual air temperature: 20 to 21.1 degrees C (68 to 70 degrees F)
Frost-free period: 219 to 313 days
Elevation: 0 to 27 m (0 to 89 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Crowley, Edgerly, Kaplan, Judice, Midland, Mowata, Kinder, Vidrine, and Ged series.
Crowley and Kaplan soils: somewhat poorly drained; on convex ridges.
Edgerly and Mowata soils: on a higher landscape position; Edgerly soils have a mollic epipedon.
Judice and Midland soils: on a similar landscape position; have a fine particle-size control section.
Mowata soils: on a higher landscape position; fine particle-size control section. Vidrine soils: clayey argillic horizon; on low mounds or smoothed mound areas.
Kinder soils: on a higher landscape position; have red iron accumulations.
Ged soils: clayey argillic horizon; on a lower position located on the landward side of marshes.

DRAINAGE AND PERMEABILITY: Poorly drained. Permeability is slow. Runoff is high. Rare or occasional flooded for brief periods. A water table exists from as high as the 0 to 46 cm (surface to 1.5 ft) below the surface in the winter and early spring months.

USE AND VEGETATION: Used for rice and soybean production, rotated with crawfish aquaculture or pasture. Native vegetation consists of tall grasses and sedges.

DISTRIBUTION AND EXTENT: Southwest Louisiana; Land Resource Region T; MLRA 150A (Gulf Coast Prairies; the series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES PROPOSED: Calcasieu Parish, Louisiana, 2016.

REMARKS: The series was formerly included in the Leton series. It was determined that the soils associated with MLRA 150A in Louisiana are in the thermic soil temperature regime based on the Thermic-Hyperthermic Soil Temperature Study completed in 2004.

Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 34 to 84 cm (13 to 33 in. (Btg/Eg and Btg1 horizons)

Ochric epipedon: 0 to 34 cm (0 to 13 in). (Ap1 and Ap2, and Eg horizons)
Albic horizon: 22 to 34 cm (9 to 13 in). (Eg horizon)
Glossic horizon: 34 to 60 cm (13 to 24 in). (Btg/Eg horizons)
Argillic horizon: 34 to 203 cm (13 to 80 in). (Btg/Eg, Btg1, Btg2, Btg3, Btg4, and Btg5 horizons)

Aquic conditions: 0 to 95 cm (0 to 37 in) (Ap1, Ap2, Eg, Btg/Eg, Btg horizons)

ADDITIONAL DATA: KSSL data on site ID S12LA0190034.

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

National Cooperative Soil Survey
U.S.A.