LOCATION JEANERETTE LA
Established Series
Rev. DRM,JDS
02/2013
JEANERETTE SERIES
The Jeanerette series consists of very deep, somewhat poorly drained, moderately slowly permeable soils that formed in loess or silty alluvium. They are on broad, nearly level areas or slight depressions on late Pleistocene age terraces. Mean annual temperature is 67 degrees F. near the type location, and mean annual rainfall is about 60 inches. Slope is dominantly less than 0.5 percent but ranges up to 1 percent.
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Typic Argiaquolls
TYPICAL PEDON: Jeanerette silt loam, on a broad flat, in a cultivated field at an elevation of 50 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; very dark grayish brown (10YR 3/2) silt loam; grayish brown (10YR 5/2), dry; weak fine granular structure; very friable; many very fine and fine roots; slightly acid; clear smooth boundary. (4 to 10 inches thick)
Btg1--7 to 15 inches; very dark gray (10YR 3/1) silt loam; gray (10YR 5/1), dry; moderate medium subangular blocky structure; friable; many fine and very fine roots; 10 percent krotovinas; many distinct clay films on faces of peds; few medium, moderately cemented iron-manganese concretions throughout; slightly alkaline; clear wavy boundary.
Btg2--15 to 24 inches; very dark gray (10YR 3/1) silty clay loam; gray (10YR 5/1), dry; moderate medium subangular blocky structure; firm; few fine and very fine roots; 10 percent krotovinas; many distinct clay films on faces of peds; few medium, moderately cemented iron-manganese concretions throughout; slightly alkaline; clear wavy boundary. (Combined thickness of the Btg horizon ranges from 6 to 20 inches).
Btkg1--24 to 35 inches; gray (10YR 5/1) paragravelly silty clay loam; weak coarse prismatic structure parting to moderate medium subangular blocky; firm; few fine and very fine roots; 10 percent krotovinas; many distinct dark gray (10YR 4/1) clay films on faces of peds; common (20%) weakly to moderately cemented, medium to very coarse calcium carbonate concretions throughout; common fine and medium, moderately cemented iron-manganese concretions throughout; many fine prominent yellowish brown (10YR 5/6) and light olive brown (2.5Y 5/4) masses of iron accumulation throughout; slightly effervescent; moderately alkaline; gradual wavy boundary.
Btkg2--35 to 52 inches; gray (10YR 5/1) silty clay loam; weak coarse prismatic structure parting to moderate medium subangular blocky; firm; few fine and very fine roots; 10 percent krotovinas; many distinct dark gray (10YR 4/1) clay films on faces of peds; common (3%) weakly to moderately cemented, coarse and very coarse calcium carbonate concretions throughout; common fine and medium, moderately cemented iron-manganese concretions throughout; common faint light gray (10YR 7/1) calcium carbonate coatings throughout; many medium prominent yellowish brown (10YR 5/8) masses of iron accumulation throughout; moderately alkaline; gradual wavy boundary. (Combined thickness of the Btkg horizon ranges from 5 to 30 inches)
B'tg1--52 to 63 inches; gray (10YR 5/1) silty clay loam; moderate medium subangular blocky structure; firm; few fine and very fine roots; many distinct dark gray (10YR 4/1) clay films on faces of peds; few medium, moderately cemented iron-manganese concretions throughout; many medium prominent yellowish brown (10YR 5/8) masses of iron accumulation throughout; slightly alkaline; gradual wavy boundary.
B'tg2--63 to 76 inches; light brownish gray (2.5Y 6/2) silty clay loam; weak medium subangular blocky structure; firm; few fine and very fine roots; many distinct very dark gray (10YR 3/1) clay films on faces of peds and in pores; few medium dark colored moderately cemented iron-manganese concretions throughout; common medium prominent yellowish brown (10YR 5/8) masses of iron accumulation throughout; slightly alkaline; gradual wavy boundary.
Btg3--76 to 88 inches; light brownish gray (2.5Y 6/2) silty clay loam; weak medium subangular blocky structure; firm; few fine and very fine roots; many distinct very dark gray (10YR 3/1) clay films on faces of peds; few medium dark colored moderately cemented iron-manganese concretions throughout; common medium prominent yellowish brown (10YR 5/6) masses of iron accumulation throughout; slightly alkaline.
TYPE LOCATION: Acadia Parish, Louisiana; 2.8 miles northeast of Richard; 1000 feet east of State Highway 95 on Parish Road P3-26; then 100 feet north in cultivated field; 2450 feet north and 1000 feet east of the southwest corner of sec 8, T.7 S., R.2 E.; USGS Richard, LA., 7.5 minute topographic quadrangle; 30 degrees 27 minutes 32 seconds N. Latitude, 92 degrees 17 minutes 31 seconds W. Longitude, NAD 83.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to more than 80 inches. The thickness of the mollic epipedon ranges from 10 to 30 inches. The calcium-magnesium ratio is 1 or more. Depth to the Btk horizon ranges from 20 to 40 inches. Total content of very fine sand through very coarse sand is less than 10 percent throughout the solum, and strongly cemented or harder concretions are less than 5 percent. Reaction is moderately acid to slightly alkaline in the A horizon, and neutral to moderately alkaline in the subsoil and underlying layers.
The A or Ap horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2; or hue of 2.5Y, value of 3, and chroma of 2; or it is neutral with value of 3. Texture is silt loam or silt.
The Btg horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2, or it is neutral with value of 3. Redoximorphic features are in shades of olive, brown, or gray. Texture is silt loam or silty clay loam.
The Btkg horizon has hue of 10YR to 5Y, value of 4 to 6, and chroma of 1; or hue of 2.5Y, value of 4 to 6, and chroma of 1 or 2; or hue of 5Y, value of 4 to 6, and chroma of 1 to 3. Very weakly to moderately cemented calcium carbonate concretions, 2 to 75 millimeters in diameter, make up 3 to 25 percent of the horizon by volume. Calcium carbonate equivalency ranges up to 5 percent. Texture is silt loam or silty clay loam in the fine earth fraction. The Btkg horizon is discontinuous in some pedons.
The B'tg horizon and the Btg3 horizon have hue of 10YR to 5Y, value of 4 to 6, and chroma of 1 or 2. Peds coatings have chroma of 1 or 2, and redoximorphic features are in shades of olive, brown, or gray. Texture is silt loam or silty clay loam.
Some pedons have a Btk and a Bt horizon that has similar hue, value and texture as the Btkg, B'tg or Btg3 horizon, but with chroma ranging from 3 to 6.
The BC or C horizon, where present, has the same color range as the lower Bt, B'tg or Btg3 horizon. Texture is silt loam, loam, very fine sandy loam, or silty clay loam.
COMPETING SERIES: The
Andry series is in the same family. The
Essen,
Loreauville,
Meaton,
Morey, and
Urich series are in closely related families. Andry soils have a histic epipedon and have moderate to high salinity in all mineral horizons. Essen, and Loreauville soils do not have a mollic epipedon. Meaton soils have siliceous minerology. Morey soils have a fine-loamy particle size control section. Urich soils are more acid and do not have secondary carbonates in the solum.
GEOGRAPHIC SETTING: These soils are on nearly level to depressional areas on uplands or terraces. Slopes are less than 1 percent. They formed in late Pleistocene age loess deposits or silty alluvium. Average annual temperature ranges from 60 to 70 degrees F., and average annual rainfall ranges from 55 to 65 inches. Frost free days range from 235 to 350. Elevation ranges from 5 to 80 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Acy,
Coteau,
Deerford,
Essen,
Frost,
Patoutville, and
Duson series. None of these soils have a mollic epipedon. In addition, Acy soils are on nearly level terraces at low elevations that have been influenced by Mississippi River alluvium. Coteau and Duson soils are on convex ridges and side slopes. Deerford and Patoutville soils are on convex ridges and side slopes at higher elevations. Essen soils are on convex ridges at lower elevations. Frost soils are on broad depressional areas and along drainageways.
DRAINAGE AND PERMEABILITY: Jeanerette soils are somewhat poorly drained. Runoff is slow and permeability is moderately slow. The soil is wet in the layers below 1 to 2.5 feet during the months of December through April in most years. Some areas are subject to rare flooding.
USE AND VEGETATION: Most of the soil is cleared and is used for pasture or for growing sugarcane, rice, soybeans, cotton, wheat, and grain sorgum, in rotation with crayfish production. Native vegetation is big bluestem, indiangrass, and switchgrass. Some areas are in woodland that is presumed to be recent encroachment on the grassland.
DISTRIBUTION AND EXTENT: Southern Mississippi Valley Silty Uplands (MLRA 134) in southern Louisiana. The series is of large extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AUBURN, ALABAMA
SERIES ESTABLISHED: St. Mary Parish, Louisiana; 1952.
REMARKS: Diagnostic horizons and properties recognized in the type location pedon include:
Mollic epipedon - from a depth of 0 to 24 inches (Ap, Btg1, and Btg2 horizons).
Argillic horizon - from a depth of 7 to 88 inches (Btg, Btkg, B'tg and Btg3 horizons).
Secondary carbonates - from a depth of 24 to 52 inches (Btkg horizons)
ADDITIONAL DATA: Laboratory data on the typifying pedon were obtained from the National Soil Survey Laboratory (Sample Number S93LA-001-15).
National Cooperative Soil Survey
U.S.A.