LOCATION LAGRANGE AR

Established Series
Rev. LBW
10/2018

LAGRANGE SERIES

The Lagrange series consists of very deep, poorly drained, moderately permeable soils that formed in loamy alluvium over loess. These soils are on natural levees and floodplains of small streams on Pleistocene Terraces in the lower Mississippi River valley; MLRA 131. Slopes range from 0 to 2 percent.

TAXONOMIC CLASS: Coarse-silty, mixed, active, thermic Typic Epiaqualfs

TYPICAL PEDON: Lagrange fine sandy loam, cultivated. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 8 inches; brown (10YR 4/3) fine sandy loam; moderate medium granular structure; friable; many fine and medium roots; many fine continuous oblique and vertical inped tubular pores; common coarse distinct grayish brown (10YR 5/2) iron depletions in matrix; common fine distinct dark yellowish brown (10YR 4/4) iron accumulations around root channels; very strongly acid; abrupt smooth boundary.

Bg1--8 to 12 inches; light brownish gray (10YR 6/2) fine sandy loam; weak medium subangular blocky structure; friable; common fine roots; many fine continuous vertical inped tubular pores; many medium distinct brown (10YR 4/3) and few fine distinct dark yellowish brown (10YR 4/4) iron accumulations in matrix; strongly acid; clear smooth boundary.

Bg2--12 to 23 inches; light brownish gray (10YR 6/2) fine sandy loam; weak coarse subangular blocky structure; friable; common fine roots; many fine continuous vertical inped tubular pores; common medium distinct yellowish brown (10YR 5/6) and few coarse distinct yellowish brown (10YR 5/8) iron accumulations in matrix; few fine yellowish brown (10YR 5/6) iron nodules in matrix; strongly acid; clear smooth boundary.

Bg3--23 to 28 inches; variegated light brownish gray (10YR 6/2) and yellowish brown (10YR 5/6) silt loam; moderate fine and medium subangular blocky structure; friable; common fine and medium roots; many very fine and fine continuous vertical inped tubular pores; common fine and medium yellowish brown (10YR 5/6) iron nodules in matrix; very strongly acid; abrupt smooth boundary.

2Btg1b--28 to 34 inches; light brownish gray (10YR 6/2) silt loam; moderate very fine and fine subangular blocky structure; friable; few fine roots; common fine continuous vertical inped tubular pores; few faint gray (10YR 5/1) clay films on faces of some peds and around iron accumulations; few fine faint light gray (10YR 7/2) clay depletions along old prism faces; common medium distinct yellowish brown (10YR 5/8) and few fine distinct dark yellowish brown (10YR 4/4) iron accumulations in matrix; common fine and medium yellowish brown (10YR 5/8) iron nodules in matrix; very strongly acid; clear smooth boundary.

2Btg2b--34 to 47 inches; light brownish gray (10YR 6/2) silt loam; moderate medium subangular blocky structure; friable; few fine roots; common fine continuous vertical inped tubular pores; few faint gray (10YR 5/1) clay films on faces of peds and lining root channels and voids; few old root channels 1/4 to 1 inch in diameter filled with light gray (10YR 7/2) loam; many medium distinct yellowish brown (10YR 5/8) and common medium distinct dark yellowish brown (10YR 4/4) iron accumulations in matrix; common fine black (10YR 2/1) iron-manganese concretions; very strongly acid; clear smooth boundary.

2Bt1b--47 to 61 inches; yellowish brown (10YR 5/6) silt loam; moderate medium and coarse subangular blocky structure; friable; few fine roots; many very fine and fine continuous vertical inped tubular pores; few faint gray (10YR 5/1) clay films on faces of peds and lining root channels and voids; few old root channels 1 to 2 inches in diameter filled with light gray (10YR 7/2) loam; many medium distinct dark yellowish brown (10YR 4/4) iron accumulations and many coarse distinct light brownish gray (10YR 6/2) iron depletions in matrix; many fine very dark grayish brown (10YR 3/2) iron-manganese concretions; slightly acid; clear smooth boundary.

2Bt2b--61 to 80 inches; yellowish brown (10YR 5/6) silt loam; moderate fine and medium subangular blocky structure; friable; few fine roots; many very fine and fine continuous vertical inped tubular pores; few faint clay films lining root channels and voids; many coarse distinct light brownish gray (10YR 6/2) iron depletions in matrix; many fine dark brown (10YR 3/3) iron-manganese concretions; neutral.

TYPE LOCATION: Phillips County, Arkansas; 585 feet north and 300 feet west of the southeast corner of the northeast 1/4 of section 3; SE1/4SE1/4NE1/4, sec.3, T. 1 S., R. 3 E.

RANGE IN CHARACTERISTICS: Solum thickness is greater than 60 inches. Depth to the discontinuity ranges from 20 to 40 inches. Reaction is very strong acid or strongly acid in the A, Bg and 2Btg horizons, except for surface layers that have been limed and ranges from strongly acid to neutral in the 2Bt horizon.

The Ap horizon has hue of 10YR, value of 4, and chroma of 2 to 4. Texture is fine sandy loam, or sandy loam.

The Bg horizon has hue of 10YR, 2.5Y or 5Y, value of 6 or 7, and chroma of 1 or 2. Texture is fine sandy loam, sandy loam or very fine sandy loam. Some pedons contain thin horizons of loamy fine sand. Redoximorphic accumulations and depletions are in shades of brown or gray.

The 2Btg horizon has hue of 10YR, 2.5Y or 5Y, value of 6 or 7, and chroma of 1 or 2. Texture is silt loam. Redoximorphic accumulations and depletions are in shades of brown or gray.

The 2Bt horizon has hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 4 to 8. Texture is silt loam or silty clay. Redoximorphic accumulations and depletions are in shades of brown or gray.

COMPETING SERIES: There are currently no other series in this family.

GEOGRAPHIC SETTING: Lagrange soils are located on level to nearly level Pleistocene terraces in the Western Lowlands of Arkansas and possibly other similar areas in the lower Mississippi Valley. These areas are loess covered Late Wisconsin outwash terraces that have been inundated with floodwaters carrying loamy alluvial sediments.

GEOGRAPHICALLY ASSOCIATED SOILS: The include Falaya, Henry, Marvell, Waverly and Zachary soils. Falaya, Waverly and Zachary soils are on floodplains and have silt loam or silty clay loam textures throughout. Henry soils are on adjacent similar landscapes and contain a fragipan. Marvell are on higher adjacent landscapes and are well drained and have browner colors throughout.

DRAINAGE AND PERMEABILITY: Poorly drained; runoff is negligible to low; permeability is moderately slow. A perched water table is within 15 inches of the soil surface for long periods in the winter and spring months.

USE AND VEGETATION: Most areas have been cleared and used for cultivated crops. Common crops include soybeans, cotton and corn. The native vegetation was dense forest of oaks, ash, cottonwood, elm, sweetgum and hackberry.

DISTRIBUTION AND EXTENT: Western Lowlands of Arkansas and possibly other areas in the lower Mississippi River valley with similar landscapes; MLRA 131. The series is of small extent, with about 8000 acres in Arkansas.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: AUBURN, ALABAMA

SERIES ESTABLISHED: Phillips County, Arkansas, 1971.

REMARKS: Diagnostic horizons and features recognized in this pedon include:

Ochric epipedon-surface to a depth of 8 inches (Ap horizon).
Cambic horizon-8 to 28 inches (Bg1, Bg2 and Bg3 horizons).
Argillic horizon-28 to 80 inches (2Btg1b, 2Btg2b, 2Bt1b and 2Bt2b horizons).
Lithologic Discontinuity-contact between loamy alluvium and loess at 34 inches.
Aquic conditions-8 to 47 inches

ADDITIONAL DATA: Characterization of the typical pedon by the University of Arkansas Soil Characterization Laboratory. Pedon 75PH01; sample numbers S75AR105-01-(1-8).

National Cooperative Soil Survey
U.S.A.