LOCATION LASSITER TXEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, nonacid, thermic Aquic Udifluvents
TYPICAL PEDON: Lassiter silt loam--wooded pasture.
(Colors are for moist soil unless otherwise
stated.)
A1--0 to 5 inches; very dark grayish brown (10YR 3/2) silt
loam; few fine strata less than 1 cm thick of brown (10YR 4/3)
very fine sandy loam; weak fine subangular blocky structure; hard, friable; common fine and medium roots; common fine pores; common wormcasts and tubular channels; neutral; clear smooth boundary.
(3 to 14 inches thick)
C1--5 to 28 inches; brown (10YR 4/3) silt loam; few to common medium faint dark grayish brown (10YR 4/2) and grayish brown (10YR 5/2) mottles; massive; but parts along bedding planes into platy fragments; hard, friable; few fine roots; common fine pores; few wormcasts and tubular channels; weakly to prominently stratified
with layers 1 to 3 mm thick that are pale brown (10YR 6/3) very
fine sandy loam; few fine distinct yellowish brown mottles along bedding planes; neutral; gradual smooth boundary. (17 to 40
inches thick)
Ab--28 to 42 inches; very dark grayish brown (10YR 3/2) silt loam; common medium faint dark grayish brown (10YR 4/2) mottles
and few fine distinct yellowish brown mottles; moderate medium subangular blocky structure; hard, friable; few fine roots; common fine pores; few wormcasts and tubular channels; few thin lenses of brown (10YR 5/3) very fine sandy loam; few fragments of charcoal; slightly acid; gradual smooth boundary. (0 to 22 inches thick)
B2tb--42 to 72 inches; dark grayish brown (10YR 4/2) clay
loam; common medium distinct dark yellowish brown (10YR 5/6) and strong brown (7.5YR 5/6) mottles and common medium faint gray
(10YR 5/1) and grayish brown (10YR 5/2) mottles; weak medium subangular blocky structure; hard, friable; few fine roots; few
fine pores; few wormcasts and tubular channels; few thin patchy
clay films mainly in pores and old root channels; few pockets of uncoated sand grains; slightly acid.
TYPE LOCATION: Lamar County, Texas; from the intersection of Farm Road 79 and Loop 286 in Paris, 3.2 miles northwest on Farm Road
79, 3.5 miles west on Farm Road 2820, 1.3 miles north on county
road, and 50 feet west in Little Pine Creek flood plain.
RANGE IN CHARACTERISTICS: Depth to buried horizons ranges from 22
to 55 inches.
The A horizon is very dark grayish brown (10YR 3/2), dark grayish brown (10YR 4/2), or brown (10YR 4/3). Where moist, values, are
less than 3.5 the horizon is less than 7 inches thick. Texture is mainly silt loam or loam but includes silty clay loam. Reaction
is slightly acid or neutral.
The C horizon is dark grayish brown (10YR 4/2), light gray (10YR 7/2), light brownish gray (10YR 6/2), brown (10YR 4/3, 5/3), or
pale brown (10YR 6/3). Few or common mottles of grayish brown and yellowish brown are present. Texture is silt loam, loam, or silty clay loam. Clay content of the 10- to 40-inch control section
ranges from 18 to 30 percent and less than 15 percent sand that is coarser than very fine sand. Bedding planes range from few to
many. Reaction is medium acid through neutral.
The Ab horizon, where present, is 1 or 2 units of value lower than the overlying material. It contains few to common mottles of
gray, grayish brown, or yellowish brown, and it is silt loam or
loam and is medium acid through neutral.
A B2tb horizon is commonly below a depth of 40 inches. It is very dark grayish brown (10YR 3/2), dark grayish brown (10YR 4/2),
grayish brown (10YR 5/2), or brown (10YR 4/2), with common fine
and medium mottles of gray, brown, and yellow in hues of 7.5YR or 10YR. Texture is mainly clay loam but includes loam or silty clay loam. Reaction is strongly acid through neutral.
COMPETING SERIES: There are no competing series in the same
family. Other similar series are the
Adler,
Belden,
Bruin,
Cascilla,
Chenneby,
Clemville,
Collins,
Commerce,
Coushatta,
Kemp,
Keo,
Lynnville,
Norwood,
Retrop, and
Varro series. Adler, Bruin, Collins, and Keo soils have less than 18 percent clay in the
control section. Belden, Cascilla, Chenneby, Commerce, and
Coushatta soils have cambic horizons. In addition, Cascilla and Coushatta soils lack mottles of chroma 2 or less within 20 inches
of the surface. Chenneby soils are more acid. Clemville,
Norwood, Retrop, and Varro soils are calcareous and lack mottles
of chroma 2 or less within 20 inches of the surface. Kemp soils
have fine-loamy control sections. Lynnville soils have mollic epipedons.
GEOGRAPHIC SETTING: Lassiter soils are on nearly level to gently sloping flood plains. Slope is 0 to 2 percent. These soils
formed in loamy alluvial sediments. Near the type location the average annual precipitation is about 45 inches, the average
annual temperature is about 63 degrees F., and the Thornthwaite
P-E index is about 68.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the similar Varro
series and the
Kaufman,
Nahatche, and
Waskom series. Kaufman and Waskom soils have mollic epipedons. In addition, Kaufman soils
are clayey throughout, and Waskom soils have argillic horizons. Nahatche soils have an aquic moisture regime and are saturated at some season during the year.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow runoff; moderate permeability. These soils are flooded from one to
several times each year for 1 to 7 days. A water table is 20 to
40 inches below the surface mainly during winter and spring
months.
USE AND VEGETATION: Used mainly for tame pasture and hayland.
The native vegetation is elm, green ash, hackberry, pecan, osage orange, panicums, paspalums, wildrye, and greenbriers.
DISTRIBUTION AND EXTENT: These soils occur mainly in the Texas Claypan land resource area of northeast Texas. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Lamar County, Texas; 1975.
REMARKS: These soils were formerly classified in the Alluvial
great soil group and included in the Gowan series.