LOCATION GOODWILL LAEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Ultic Hapludalfs
TYPICAL PEDON: Goodwill silt loam, on a 1 percent south-facing
slope in a pasture.
Ap--0 to 5 inches; brown (10YR 4/3) silt loam; weak medium
fine granular structure; friable; common fine roots; few fine
brown concretions; very strongly acid; clear smooth boundary. (3
to 10 inches thick)
B21t--5 to 9 inches; brown (10YR 5/3) silt loam; common
medium faint brown (7.5YR 4/4) mottles; weak medium subangular
blocky structure; friable common very fine roots; thin patchy clay films on faces of peds; few fine brown concretions; very strongly acid; gradual wavy boundary. (4 to 15 inches thick)
B22t--9 to 18 inches; brown (10YR 5/3) silty clay loam;
common medium faint brown (7.5YR 4/4) mottles; weak coarse
subangular blocky parting to moderate medium subangular blocky structure; firm; few fine roots; few fine pores; thin distinct discontinuous clay films on faces of peds and in pores; common
medium and fine black and brown concretions; very strongly acid; gradual wavy boundary. (8 to 18 inches thick)
B23t--18 to 28 inches; brown (10YR 5/3) silt loam; many
coarse faint brown (7.5YR 4/4) mottles; weak medium subangular
blocky structure; firm; few fine roots; thin patchy clay films on faces of peds; few medium and coarse brown and black concretions; very strongly acid; gradual wavy boundary. (0 to 15 inches thick)
B24t--28 to 42 inches; yellowish brown (10YR 5/6) and brown (7.5YR 4/4) loam; vertical streaks, 1 to 3 cm in diameter, of
light brownish gray (10YR 6/2) silty clay loam, makes up about 30 percent of horizon; weak coarse prismatic parting to weak medium subangular blocky structure; yellowish brown and light brownish
gray material is friable, brown material is firm and brittle; few fine roots; few fine pores; thin patchy clay films on faces of
peds; few fine brown and black concretions; very strongly acid; gradual wavy boundary. (0 to 16 inches thick)
IIB25t--42 to 56 inches; brown (7.5YR 4/4) fine sandy loam; common medium faint brown (7.5YR 5/2) mottles; few streaks and pockets of grayish brown (10YR 5/2) and light brownish gray (10YR 6/2) loamy fine sand; weak coarse subangular blocky structure; friable; few very fine roots; few fine pores; thin patchy clay
films on faces of peds; very strongly acid; clear smooth boundary. (5 to 18 inches thick)
IIB3--56 to 72 inches; dark yellowish brown (10YR 4/4) fine sandy loam; common medium distinct grayish brown (10YR 5/2) and
light brownish gray (10YR 6/2) streaks and mottles; weak medium subangular blocky structure; friable; few fine roots; strongly
acid; clear smooth boundary. (10 to 30 inches thick)
TYPE LOCATION: Morehouse Parish, Louisiana, about 10.5 miles southeast of Mer Rouge, Louisiana; 3,400 feet east of Morehouse Parish Road 5605; 52 feet east of natural drain; 18 feet north of fence line in SW1/4SE1/4, sec. 22, T. 20 N., R. 8 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 80 inches. Depth to IIBt horizons ranges from 25 to 50 inches. The reaction of the A and B horizons ranges from very strongly acid to medium acid except for surface layers that have been limed. The
IIB horizon is strongly acid to slightly acid.
The A horizon has hue of 10YR, value of 4 or 5, and chroma of 2 to
4. Texture is silt loam, very fine sandy loam, loam, fine sandy loam, or silty clay loam.
The Bt horizon has hue of 10YR, value of 4 or 5, and chroma of 3
to 6. Mottles in shades of brown range from few to many. It is silty clay loam, loam, or silt loam.
The IIBt horizon has hue of 7.5YR, 5YR, or 10YR, value of 4 to 6,
and chroma of 3 to 6. Either brownish or grayish mottles or both range from few to many. Texture is fine sandy loam, silt loam,
loam, fine sandy loam, or loamy fine sand.
COMPETING SERIES: These are the
Armour,
Barnsdall,
Dexter,
Dossman, and
Hicks series in the same family and
Dubbs,
Dundee,
Gallion,
Goldman,
Rilla, and
Sterlington series in related
families. Armour and Hicks soils are underlain by limestone at depths of 4 to 10 feet. Barnsdall, Dexter, Dossman, Gallion, and Rilla soils have upper B2t horizons with color hue of 5YR or
redder. Dubbs soils have a solum thickness of 25 to 55 inches and lack IIBt horizons. Dundee soils are more poorly drained and have dominant 2 chroma colors in the B2t horizon. Goldman soils are
more poorly drained and have 2 chroma mottles in the upper 10
inches of the B2t horizon. Sterlington soils have coarse-silty control sections.
GEOGRAPHIC SETTING: Goodwill soils are on level or nearly level
low terraces that were natural levees of distributaries of the Mississippi River. Slope gradients are 0 to 5 percent. These
soils formed in loamy alluvial sediments or mixed alluvial and
loess deposits. Mississippi River sediments over Arkansas River sediments. Near the type location the mean annual precipation is about 51 inches and the mean annual temperature is about 66
degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Dexter series and the
Forestdale,
Idee,
Perry, and
Portland series. Forestdale, Perry, and Portland soils are at lower elevations, and have clayey control sections. Idee soils are at slightly lower elevations and have Bt horizon colors that are dominantly 2
chroma.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability.
USE AND VEGETATION: Most areas are cleared and in cropland
mainly soybeans and cotton. The native vegetation was bottomland hardwoods.
DISTRIBUTION AND EXTENT: Louisiana and possibly Arkansas. This series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Morehouse Parish, Louisiana; 1981.