LOCATION LIBUSE LA+AR
Established Series
Rev. WLC:AK:MJB
01/2017
LIBUSE SERIES
The Libuse series consist of very deep, moderately well drained, slowly permeable soils that formed in a silty mantle of loess or mixed loess and coastal plain sediments over coastal plain sediments. These soils are nearly level to strongly sloping terraces. Slope ranges from 1 to 12 percent, but are dominantly 1 to 5 percent. Mean annual air temperature is about 18 degrees C (65 degrees F), and mean annual precipitation is about 1536 mm (60.5 in)
TAXONOMIC CLASS: Fine-silty, siliceous, semiactive, thermic Typic Fragiudalfs
TYPICAL PEDON: Libuse silt loam on a 2 percent slope in pine woodland, at an elevation of 29 m (95 ft). (Colors are for moist soil unless otherwise stated.)
A--0 to 13 cm (0 to 5 in); very dark gray (10YR 3/1) silt loam; weak fine granular structure; friable; many fine roots; slightly acid; clear wavy boundary. (Thickness of the A horizon is 8 to 20 cm [3 to 8 in])
E--13 to 23 cm (5 to 9 in); yellowish brown (10YR 5/4) silt loam; weak medium subangular blocky structure; friable; common fine roots; moderately acid; clear wavy boundary. (Thickness of the E horizon is 0 to 25 cm [0 to 10 in])
Bt--23 to 51 cm (9 to 20 in); yellowish brown (10YR 5/6) loam; moderate medium subangular blocky structure; friable; common fine roots; common fine pores; distinct clay films in pores and on peds; common medium prominent red (2.5YR 4/6) masses of oxidized iron with clear boundaries in matrix; strongly acid; clear wavy boundary. (Thickness of the Bt horizon is 20 to 61 cm [8 to 24 in])
Btx/E1--51 to 74 cm (20 to 29 in); yellowish brown (10YR 5/6) loam; moderate coarse prismatic structure; firm and brittle; few fine roots between prisms; common fine pores; distinct clay films in pores and on faces of peds; 15 percent vertical seams (E1) of light brownish gray (10YR 6/2) silt loam clay depletions about 2 cm wide between prisms; 15 percent light brownish gray (10YR 6/2) redox depletions are bounded by a thin band of firm and brittle red (2.5YR 4/6) masses of oxidized iron with clear boundaries; 60 percent prisms that are 10 to 15 cm (4 to 6 in) in diameter comprise the horizontal cross section; very strongly acid; gradual wavy boundary.
Btx/E2--74 to 107 cm (29 to 42 in); yellowish brown (10YR 5/6) loam; moderate coarse prismatic structure; firm and brittle; few roots in polygonal network between prisms; thin clay films on faces of peds and in pores; 20 percent vertical seams (E2) of light brownish gray (10YR 6/2) silt loam, clay depletions are about 2 cm wide surround prisms; 65 percent prisms that average about 10 to 13 cm (4 to 5 in) in diameter; very strongly acid; gradual wavy boundary.
Btx/E3--107 to 137 cm (42 to 54 in); yellowish brown (10YR 5/6) loam; weak coarse prismatic structure that parts into weak medium subangular blocky; firm; few fine pores; distinct clay films in pores and on faces of peds; 20 percent vertical seams (E3) of light brownish gray (10YR 6/2) silt loam, clay depletions are about 2 cm wide surround prisms; 65 percent prisms that average about 10 to 13 cm (4 to 5 in) in diameter; common medium prominent gray (10YR 6/1) redox depletions with diffused boundaries in matrix; very strongly acid; gradual wavy boundary. (Combined thickness of Btx/E horizons is 38 to 145 cm [15 to 57in])
2BC--137 to 152 cm (54 to 60 in); brownish yellow (10YR 6/6) very fine sandy loam; weak coarse subangular blocky structure; friable; about 10 percent very fine sand skeletons in vertical streaks; many medium prominent gray (10YR 6/1) redox depletions with clear boundaries in matrix; moderately acid
TYPE LOCATION: Rapides Parish, Louisiana, 2.5 miles southeast of Libuse, 15 feet south of dirt road, SW 1/4 SW 1/4 sec. 6 T. 4 N., R. 2 E.
USGS Topographic Quadrangle: Libuse, LA
Latitude: 31 degrees, 18 minutes, 46.3702 seconds N
Longitude: 92 degrees, 18 minutes, 46.3702 seconds W
Decimal Degrees:
Latitude: 31.3128806 degrees
Longitude: -92.3128806 degrees
Datum: WGS84
UTM Easting: 565382.2 m
UTM Northing: 3464481.6 m
UTM Zone: 15N
RANGE IN CHARACTERISTICS:
Solum thickness: 152 to more than 203 cm (60 to more than 80 in)
Soil Moisture: udic moisture regime. The soil moisture control section is not dry in any part for more than 90 days in normal years
Depth to argillic: 8 to 46 cm (3 to 18 in)
Depth to redox concentrations: 8 to 46 cm (3 to 18 in)
Depth to fragipan: 28 to 91 cm (11 to 36 in)
Depth to lithological discontinuity: 127 to 178 cm (50 to 71 in)
Particle-size control section (weighted average):
Clay content: 18 to 30 percent
Effective CEC: saturated with 50 percent or more exchangeable aluminum in the control section to a depth of 76 cm (30 in) or more
A or Ap horizon:
Hue: 10YR
Value: 3 to 5
Chroma: 1 to 3
Other features: horizons with color value of 3, are less than 15 cm (6 in) thick and have values of 4 or more when the upper 17.8 cm (7 in) are mixed
Texture: very fine sandy loam, silt loam, or loam
Reaction: extremely acid to slightly acid (3.5 to 6.5)
E horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 1 to 4
Texture: very fine sandy loam, silt loam, or loam
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
BE horizon (where present):
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silt loam or loam
Redox concentrations: amount-none to common; size-fine or medium; contrast-faint or distinct; color-shades of red, brown or yellow; boundary-diffuse or clear; location-in matrix
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
Bt horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silt loam, loam, or silty clay loam
Clay films: distinctness-faint or distinct; location-ped faces and along pore linings;
Redox concentrations: amount-none to common; size-fine or medium; contrast-faint or distinct; color-shades of red, brown or yellow; boundary-diffuse or clear; location-in matrix
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
Btx or Btx/E horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silt loam, loam, or silty clay loam
Clay films: distinctness-distinct; location-ped faces and along pore linings
Redox concentrations: amount-none to common; size-fine or medium; contrast-faint or distinct; colors-shades of red, brown or yellow; boundary-diffuse or clear; location-in matrix
Redox depletions: amount-none to common; size-fine or medium; contrast-faint to prominent; color-shades of gray; boundary-diffuse; location-in vertical seams between prisms
Iron-manganese concentrations: amount-none to few; size-fine or medium; kind- nodules
Brittleness: 60 to 70 percent
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
BC or C horizon (where present):
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 4 to 8
Texture: loam, silt loam, or sandy clay loam
Redox concentrations: amount-none to common; size-fine or medium; contrast-faint or distinct; color-shades of red, brown or yellow; boundary-diffuse or clear; location-in matrix
Redox depletions: amount-none to common; size-fine or medium; contrast-faint to prominent; color-shades of gray; boundary-diffuse; location-in vertical seams between prisms
Iron-manganese concentrations: amount-none to few; size-fine or medium; kind- nodules
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
2BC horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 to 8
Texture: very fine sandy loam, loam, silt loam, or sandy clay loam
Redox concentrations: amount-none to common; size-fine or medium; contrast-faint or distinct; color-shades of red, brown or yellow; boundary-diffuse or clear; location-in matrix
Redox depletions: amount-none to common; size-fine or medium; contrast-faint to prominent; color-shades of gray; boundary-diffuse; location-in vertical seams between prisms
Iron-manganese concentrations: amount-none to few; size-fine or medium; kind-nodules
Reaction: very strongly acid to moderately acid (4.5 to 6.0)
COMPETING SERIES: These are the
Byler (TN) series in the same family and the
Cart (TX),
Dulac (TN),
Erno (TX),
Grenada (MS), Leverette (MS),
Loring (TN),
Olivier (LA),
Providence (MS),
Savannah (MS), and
Thage (TX) series.
Byler soils: have a clayey 2Bt horizon within the series control section
Cart soils: do not have fragipans and have coarse-loamy control section
Dulac,
Grenada, Leverette,
Loring,
Olivier, and
Providence soils: have mixed mineralogy; in addition Leverette soils have coarse-silty control sections, Grenada soils have an A' horizon above the fragipan and the clay maxima below the fragipan
Erno and
Savannah soils: have fine-loamy control sections
Olivier and
Thage soils: have 1 or 2 chroma mottles in the upper 25 cm (10 in) of the B horizon
GEOGRAPHIC SETTING:
Parent material: thin mantle of loess over loamy coastal plain sediments
Landscape: Coastal Plain
Landform: interfluve
Slope: 1 to 12 percent, dominantly 1 to 5 percent
Mean annual air temperature: 15 to 22 degrees C (59 to 72 degrees F)
Mean annual precipitation: 1219 to 1726 mm (48 to 67.5 in)
Mean annual soil temperature: 16.1 to 23 degrees C (61 to 73.6 degrees F)
Frost-free period: 200 to 291 days
Elevation: 24.4 to 91.4 m (80 to 300 ft)
GEOGRAPHICALLY ASSOCIATED SOILS:
These include the competing
Providence (MS) and the
Acadia (LA),
Frizzell (LA)
Gore (LA),
Guyton (LA),
Kolin (LA),
Tippah (MS),
Vick (LA)
Acadia soils: are in slightly lower positions and have grayer colors in the subsoil
Frizzell soils: are on similar positions and have coarse-silty control sections
Gore soils: are in lower positions and are clayey
Guyton soils: are in lower positions and are subject to frequent flooding
Kolin soils: are in similar positions and are underlain by clayey textures
Providence soils: are on slightly higher positions on older terraces and have redder colors
Tippah soils: are on higher positions and are underlain by clayey textures
Vick soils: are in similar positions, are somewhat poorly drained, and do not have a fragipan
DRAINAGE AND PERMEABILITY:
Drainage: moderately well drained
Permeability: moderately slow in the upper part of the B horizon and slow in the fragipan
Runoff: low on slopes less than 1 percent, medium on 1 to 5 percent slopes, and high on greater than 5 percent slopes
Seasonal high water table: a perched above the fragipan is present for short durations after heavy rains
USE AND VEGETATION: The major uses are pine woodland or pasture. A few acres are cultivated.
DISTRIBUTION AND EXTENT: Arkansas, Louisiana, and possibly Mississippi; LRR P; MLRA 133B. The series is of moderate extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Rapides Parish, Louisiana; 1972.
REMARKS:
The Libuse series was formerly mapped with the Providence series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 23 cm (0 to 9 in) (A, E horizons)
Argillic horizon: 23 to 137 cm (9 to 54 in) (Bt, Btx/E1, Btx/E2, Btx/E3 horizons)
Redox concentrations: 23 to 152 (9 to 60 in) (Bt, Btx/E1, Btx/E2, Btx/E3, 2BC horizons)
Redox depletions: 51 to 152 (20 to 60 in) (Btx/E1, Btx/E2, Btx/E3, 2BC horizons)
Glossic horizon: 51 to 152 cm (20 to 60 in) (Btx/E1, Btx/E2, Btx/E3, 2BC horizons)
Vertical intrusions of albic material (E): 51 to 152 (20 to 60 in) (Btx/E1, Btx/E2, Btx/E3, 2BC horizons)
Lithological discontinuity: 137 to 203 cm (54 to 80 in) (2BC horizon)
Edited 01/2017 (JAD-MJB) Changed to tabular format. Updated pedon description, range in characteristics, and other sections.
ADDITIONAL DATA: none
TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014
National Cooperative Soil Survey
U.S.A.