LOCATION RENTZEL TXEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Arenic Plinthaquic Paleudults
TYPICAL PEDON: Rentzel loamy fine sand, on a 2 percent slope in woodland; elevation is 95 m (314 ft) (Colors are for moist soil unless otherwise stated.)
A1--0 to 13 cm (0 to 5 in); grayish brown (10YR 5/2) loamy fine sand; weak medium subangular blocky structure; soft, very friable; many fine and medium roots; moderately acid; clear wavy boundary. (Thickness is 5 to 25 cm [2 to 10 in].)
A2--13 to 31 cm (5 to 12 in); brown (10YR 5/3); loamy fine sand with common medium faint pale brown (10YR 6/3) sand strippings; weak medium subangular blocky structure; soft, very friable; many fine and medium roots; moderately acid; clear wavy boundary. (Thickness is 0 to 25 cm [0 to 10 in].)
E1--31 to 53 cm (12 to 21 in); pale brown (10YR 6/3) loamy fine sand; single grained; soft, very friable; common fine and medium roots; moderately acid; clear wavy boundary.
E2--53 to 74 cm (21 to 29 in); very pale brown (10YR 7/3) and light gray (10YR 7/2) loamy fine sand; single grained; soft, very friable; common fine and medium roots; few medium prominent strong brown (7.5YR 5/6) masses of oxidized iron; slightly acid; gradual wavy boundary. (Combined thickness of E horizons is 20 to 51 cm [8 to 20 in].)
Bt--74 to 104 cm (29 to 41 in); distinctly variegated strong brown (7.5YR 5/8), light brownish gray (10YR 6/2), and red (2.5YR 5/8) sandy clay loam; weak medium subangular blocky structure; hard, friable; few fine and medium roots; 4 percent by volume of plinthite; few thin clay films; very strongly acid; gradual wavy boundary. (Thickness is 0 to 64 cm [0 to 25 in].)
Btv1--104 to 127 cm (41 to 50 in); reticulately variegated yellowish brown (10YR 5/8), light brownish gray (10YR 6/2), and red (2.5YR 5/8) sandy clay loam; weak medium subangular blocky structure; very hard, firm; few fine roots; 10 percent by volume of plinthite; few patchy clay films; very strongly acid; gradual wavy boundary. (Thickness is 15 to 51 cm [6 to 20 in].)
Btv2--127 to 191 cm (50 to 75 in); light gray (10YR 7/2) sandy clay loam; moderate medium prismatic structure; very hard, firm; few fine roots; 7 percent by volume of plinthite; about 10 percent by volume of brittle masses; many coarse prominent yellowish brown (10YR 5/8) and red (2.5YR 4/8) masses of oxidized iron; extremely acid.
TYPE LOCATION: Nacogdoches County, Texas; from intersection of US Highway 59 south and South Loop 224 in Nacogdoches; 0.75 mile south on US Highway 59; about 800 feet west of highway in woodland. (Latitude: 31 degrees, 33 minutes, 54.42 seconds N; Longitude: 94 degrees, 40 minutes, 30.63 seconds W. Nacogdoches South topographic quadrangle; NAD 1927). (Coordinates estimated from location directions and topographic software)
RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is dry in some or all parts for 75 to 90 days in normal years.
Mean annual soil temperature: 19 to 22 degrees C (67 to 72 degrees F)
Depth to albic horizon: 5 to 51 cm (2 to 20 in)
Depth to argillic horizon: 50 to 100 cm (20 to 40 in)
Depth to redox concentrations: 51 to 102 cm (20 to 40 in)
Depth to redox depletions: within 75 cm (30 in) of the surface or within 12.5cm (5 in) of the top of the argillic horizon
Depth to horizon with 5 percent or more plinthite: 76 to 150 cm (30 to 159 in)
Depth to episaturation: 46 to 91 cm (18 to 36 in)
Thickness of the sandy epipedon, 50 to 100 cm (20 to 40 in)
Thickness of solum: more than 200 cm (80 in)
Particle-size control section (weighted average)
Clay content: 15 to 35 percent
Sand content: 50 to 75 percent
CEC/clay ratio: 0.24 to 0.40
A or Ap Horizons
Hue: 7.5YR or 10YR
Value: 3 to 5
Chroma: 2 or 3
Texture: loamy fine sand
Clay content: 5 to 10 percent
Reaction: extremely to moderately acid (3.6 to 6.0) limed unless limed
E Horizons
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 2 to 4
Texture: loamy fine sand
Clay content: 5 to 10 percent
Redox concentrations: amount-none to few, size-fine or medium, contrast-faint to prominent, boundary-diffuse to clear , shades-brown or yellow
Redox depletions: amount-few to many, size-fine or medium, contrast-faint to distinct, boundary-diffuse or clear, shades-gray
Reaction: extremely to moderately acid (3.6 to 6.0) unless limed
Bt Horizon
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 6 to 8
Color: horizon may be variegated in shades of red, yellow, brown or gray
Texture: fine sandy loam or sandy clay loam
Clay content: 15 to 35 percent
Clay films: location on faces of peds, contrast faint to prominent
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-brown, yellow or red
Redox depletions: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, location-within the upper 12.5 cm (5 in) of the top of the Bt horizon, shades-gray
Plinthite: 0 to 4 percent nodular
Reaction: extremely to strongly acid (3.6 to 5.5)
Btg Horizon where present
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 1 or 2
Color: horizon may be variegated in shades of red, yellow, brown or gray
Texture: fine sandy loam or sandy clay loam
Clay content: 15 to 35 percent
Clay films: location on faces of peds, contrast faint to prominent
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-brown, yellow or red
Redox depletions: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, location-within the upper 12.5 cm (5 in) of the top of the Bt horizon, shades-gray
Plinthite: 0 to 4 percent nodular
Reaction: extremely to strongly acid (3.6 to 5.5)
Btv Horizon
Hue: 5YR to 10YR
Value: 5 to 7
Chroma: 1 to 8
Color: horizon can be variegated in these colors and 2.5YR colors
Texture: fine sandy loam or sandy clay loam
Clay content: 15 to 35 percent
Clay films: location on faces of peds, contrast faint to prominent
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-brown, yellow or red
Redox depletions: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-gray
Plinthite: 5 to 15 percent nodular
Brittleness: 0 to 10 percent
Reaction: extremely to strongly acid (3.6 to 5.5)
Bt' Horizon where present
Hue: 5YR to 10YR
Value: 5 to 7
Chroma: 1 to 6
Colors: horizon may have a variegated matrix of these colors
Texture: fine sandy loam or sandy clay loam
Clay content: 15 to 35 percent
Clay films: location on faces of peds, contrast faint to prominent
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-red, yellow or brown
Redox depletions: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-gray
Plinthite: 0 to 4 percent nodular
Reaction: extremely to strongly acid (3.6 to 5.5)
Btv/E or Bt/E Horizon where present
Hue: 5YR to 10YR
Value: 5 to 7
Chroma: 1 to 6
Colors: horizon may have a variegated matrix of these colors
Texture: fine sandy loam or sandy clay loam
Clay content: 15 to 35 percent
Clay films: location on faces of peds, contrast faint to prominent
Redox concentrations: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-red, yellow or brown
Redox depletions: amount-few to many, size-fine to coarse, contrast-faint to prominent, boundary-diffuse or clear, shades-gray
Plinthite: 0 to 15 percent nodular
Glossic features: 5 to 15 percent, pale brown to gray vertical intrusions of loamy fine sand or fine sandy loam E material
Reaction: extremely to strongly acid (3.6 to 5.5)
COMPETING SERIES: These are the
Choates series. Similar soils are the
Briley,
Depcor,
Leefield,
Lilbert,
Ocilla and
Rosalie series.
Choates soils: have a summer moisture deficit of 0 to 4 inches and receive more than 76 cm (30 in) of frost-free rainfall.
Briley, Ocilla and Rosalie soils: contain less than 5 percent plinthite.
Depcor soils: have base saturations over 35 percent.
Leefield soils: have a subactive cation exchange activity class.
Lilbert soils: lack redox depletions within 76 cm (30 in) of the surface.
GEOGRAPHIC SETTING:
Parent material: sandy and loamy coastal plain sediments derived from Claiborne geologic group
Landscape: coastal plain
Landform: footslopes, drainageways and depressional areas
Slope: 0 to 5 percent
Mean annual air temperature range: 18 to 21 degrees C (65 to 70 degrees F)
Mean annual precipitation range: 1016 to 1397 mm (40 to 55 in)
Frost-free period: 240 to 260 days
Elevation: 91 to 183 m (300 to 600 ft)
Thornthwaite annual P-E indices: exceeds 64
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Lilbert (TX),
Bowie (TX),
Darco (TX), and
Tenaha (TX) series.
Lilbert soils: lack redox depletions within 76 cm (30 in) of the surface and are on slightly higher convex ridges.
Bowie soils: lack a sandy epipedon and are on slightly higher positions.
Darco soils: have a sandy epipedon over 100 cm (40 in) thick and are on higher positions.
Tenaha soils: have a solum thickness of 100 to 150 cm (40 to 60 in) and are on higher positions.
DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is rapid in the sandy epipedon and moderately slow in the subsoil. Runoff is very low on slopes less than 1 percent and low on slopes up to 5 percent. The layers below a depth of 46 to 91 cm (1.5 to 3.0 feet) and above the Btv horizon are wet during December through March in normal years.
USE AND VEGETATION: Used mainly for woodland and pasture. Native vegetation consists of loblolly and shortleaf pine. Pastures are improved bermudagrass or bahiagrass.
DISTRIBUTION AND EXTENT: Eastern Texas; Land Resource Region (P); MLRA 133B; the series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Nacogdoches County, Texas, 1976, Nacogdoches county soil survey area, Texas, 1976.
REMARKS: The series was formerly included in the Leefield series. The series was separated based on cation exchange activity class.
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 74 to 124 in. (29 to 49 horizon)
Ochric epipedon: 0 to 74 cm (0 to 29 in). (A and E horizons)
Argillic horizon: 74 to 191 cm (29 to 75 in). (Bt and Btv horizons)
Redoximorphic concentrations: 53 to 195 cm (21 to 75 in). (E2, Bt, Btv horizons)
Redoximorphic depletions: 53 to 195 cm (21 to 75 in). (E2, Bt, Btv horizons)
Episaturation: The zone of saturation at 53 to 104 cm (21 to 41 in). (E2 and Bt horizons)
Aquic conditions: 53 to 104 cm (21 to 41 in)
Other features: plinthite 5 percent or more 104 to 191 cm (41 to 75 in)
Additional Comments:
The assignment of the cation-exchange activity class is inferred from lab data from S86TX-423-005 from Smith County, Texas.
ADDITIONAL DATA: Particle-size analysis tests were performed at the project office on 2 pedons. Base saturation tests were performed at the project office on 10 pedons.
TAXONOMIC VERSION: Keys to Soil Taxonomy, 10th Edition, 2006