LOCATION PRAIRIEVIEW TXTentative Series
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, hyperthermic Oxyaquic Paleudalfs
TYPICAL PEDON: Prairieview fine sandy loam--0 to 1 percent slopes in pasture
(Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) fine sandy loam, grayish brown (10YR 5/2) dry; weak very coarse subangular blocky structure; very friable, soft; common fine and very fine roots; common fine and very fine tubular pores; 1 percent fine distinct brown (7.5YR 4/3) iron-manganese masses with diffuse boundaries lining pores; 1 percent fine prominent strong brown (7.5YR 4/6) masses of oxidized iron with sharp boundaries lining pores; 1 percent fine distinct black (7.5YR 2.5/1) iron-manganese masses with sharp boundaries in matrix; 1 percent worm casts and 2 percent insect casts; moderately acid; abrupt smooth boundary.
A--6 to 12 inches; brown (10YR 4/3) fine sandy loam, brown (10YR 5/3) dry; weak medium prismatic parts to moderate medium subangular blocky structure; very friable, soft; common fine roots and very fine roots; common fine and very fine tubular pores; 1 percent fine distinct brown (7.5YR 4/3) iron-manganese masses with diffuse boundaries lining pores; 1 percent fine prominent strong brown (7.5YR 4/6) masses of oxidized iron with sharp boundaries lining pores; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 3 percent insect casts and 1 percent worm casts; moderately acid; clear smooth boundary. (combined thickness of the Ap and A horizons is 10 to 18 inches)
Bt1--12 to 18 inches; 45 percent brown (10YR 5/3) and 20 percent grayish brown (10YR 5/2) fine sandy loam, pale brown (10YR 6/3) and light brownish gray (10YR 6/2) dry; moderate medium and coarse prismatic parts to moderate medium angular blocky structure; friable, slightly hard; common fine and very fine roots; common fine and very fine tubular pores; 5 percent faint grayish brown (10YR 5/2) clay films on vertical surfaces of peds and 10 percent faint brown (10YR 5/3) clay films on surfaces of peds; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 3 percent fine prominent strong brown (7.5YR 5/8) masses of oxidized iron with clear boundaries lining pores; 5 percent fine prominent reddish yellow (7.5YR 6/8) masses of oxidized iron with clear boundaries lining pores; 3 percent insect casts and 1 percent worm casts; about 10 percent by volume yellowish brown (10YR 5/4) interfingering of E material; less than 1 percent fine spherical siliceous pebbles; slightly acid; clear smooth boundary.
Bt2--18 to 30 inches; 55 percent brownish yellow (10YR 6/6) and 30 percent light yellowish brown (10YR 6/4) sandy clay loam, yellow (10YR 7/6) and very pale brown (10YR 7/4) dry; moderate medium and coarse prismatic parts to moderate medium angular blocky structure; firm, hard; few fine roots and common very fine roots; common medium, fine, and very fine tubular pores; 25 percent faint brownish yellow (10YR 6/6) clay films on surfaces of peds; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 3 percent fine and medium yellowish red (5YR 5/8) plinthite nodules; 3 percent fine and medium prominent red (2.5YR 4/8) masses of oxidized iron with clear boundaries lining pores; 5 percent medium and coarse prominent yellowish red (5YR 5/8) masses of oxidized iron with clear boundaries lining pores; 5 percent fine and medium distinct grayish brown (10YR 5/2) iron depletions with clear boundaries on vertical surfaces of peds; 1 percent worm casts; slightly acid; clear smooth boundary.
Bt3--30 to 46 inches; 35 percent brownish yellow (10YR 6/6) and 20 percent light yellowish brown (10YR 6/4) sandy clay loam, yellow (10YR 7/6) and very pale brown (10YR 7/4) dry; moderate medium and coarse prismatic parts to moderate medium angular blocky structure; firm, hard; few very fine roots; few fine tubular and common very fine tubular pores; 10 percent faint yellowish brown (10YR 5/6) clay films and 15 percent faint brownish yellow (10YR 6/6) clay films on surfaces of peds; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 3 percent fine and medium red (2.5YR 4/8) plinthite nodules; 10 percent fine and medium prominent yellowish red (5YR 5/8) masses of oxidized iron with clear boundaries in matrix; 15 percent fine and medium prominent strong brown (7.5YR 5/8) masses of oxidized iron with clear boundaries in matrix; 5 percent fine and medium distinct light brownish gray (10YR 6/2) iron depletions with clear boundaries on vertical surfaces of peds; slightly acid; gradual smooth boundary. (combined thickness of the Bt horizons is 24 to 40 inches)
Btv--46 to 61 inches; yellowish brown (10YR 5/6) sandy clay loam, brownish yellow (10YR 6/6) dry; moderate medium and coarse prismatic parts to moderate medium and coarse angular blocky structure; very firm, hard; few very fine roots; common fine and very fine tubular pores; 5 percent faint brown (10YR 5/3) clay films and 20 percent faint yellowish brown (10YR 5/4) clay films on surfaces of peds; 1 percent fine threadlike pale brown (10YR 6/3) and light brownish gray (10YR 6/2) clay depletions on vertical surfaces of peds; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 1 percent fine and medium spherical yellowish red (5YR 4/6) and 3 percent fine and medium red (2.5YR 4/8) plinthite nodules; 8 percent fine and medium prominent yellowish red (5YR 5/8) masses of oxidized iron with clear boundaries in matrix; 15 percent medium and coarse prominent red (2.5YR 4/8) masses of oxidized iron with sharp boundaries in matrix; 12 percent fine and medium prominent strong brown (7.5YR 5/8) masses of oxidized iron with clear boundaries in matrix; 15 percent fine and medium distinct light brownish gray (10YR 6/2) iron depletions with clear boundaries on vertical surfaces of peds; slightly acid; gradual smooth boundary. (10 to 20 inches thick)
Bt/E--61 to 80 inches; 30 percent brownish yellow (10YR 6/6) and 15 percent pinkish gray (7.5YR 7/2) (E) sandy clay loam, yellow (10YR 7/6) and pinkish gray (7.5YR 7/2) dry; moderate medium and coarse prismatic parts to moderate medium and coarse angular blocky structure; firm, hard; few very fine roots; few fine tubular and common very fine tubular pores; 15 percent faint yellowish brown (10YR 5/4) clay films on surfaces of peds; 1 percent fine and medium spherical dark brown (7.5YR 3/2) ironstone nodules; 1 percent fine and medium spherical yellowish red (5YR 4/6) and 3 percent fine and medium red (2.5YR 4/8) plinthite nodules; 1 percent fine and medium spherical reddish black (2.5YR 2.5/1) iron-manganese concretions; 8 percent fine and medium prominent strong brown (7.5YR 5/8) masses of oxidized iron with clear boundaries in matrix; 20 percent medium and coarse prominent red (2.5YR 4/8) masses of oxidized iron with sharp boundaries in matrix; 5 percent fine and medium distinct light gray (10YR 7/2) iron depletions with clear boundaries in center of albic material; E part is interfingering of albic material 1 to 4 centimeters wide of fine sandy loam texture that increases with depth; neutral.
TYPE LOCATION: Waller County, Texas; from the intersection of U.S. Highway 290 Business and Farm Road 362 in Waller; 5.5 miles south on Farm Road 362 to county road; 1 mile west on county road; located about 0.4 mile north in cropland; Latitude: 29 degrees, 59 minutes, 29.6 seconds North; Longitude: 95 degrees, 58 minutes, 8.2 seconds West.
RANGE IN CHARACTERISTICS: The solum is more than 80 inches thick.
Soil Moisture: An udic soil moisture regime. The soil moisture control section, 4 to 12 inches, is typically moist from September to July in normal years. The cumulative total number of days the soil moisture control section is dry is less than 90 days.
Mean annual soil temperature: 69 to 72 degrees F.
Depth to albic materials: 55 to 70 inches
Depth to argillic horizon: 8 to 18 inches
Depth to redox depletions: 15 to 20 inches
Particle-size control section (weighted average)
Clay content: 20 to 30 percent
CEC/clay ratio: 0.25 to 0.40
Ap or A Horizon
Hue: 10YR
Value: 3 to 5
Chroma: 2 or 3; Pedons with value of 3 and chroma of 2 or 3 are less than 10 inches thick.
Texture: fine sandy loam
Redox accumulations: amount-0 to 3 percent, size-fine, contrast-faint to prominent, boundary-sharp to diffuse, location-lining pores, shades-brown
Reaction: strongly acid or moderately acid
Upper part of the Bt Horizon
Hue: 10YR
Value: 5
Chroma: 2 to 4
Texture: fine sandy loam, sandy clay loam
Clay content: 15 to 22 percent
Clay films: location-surfaces of peds, contrast-faint or distinct
Redox accumulations: amount 2 to 15 percent, size-fine or medium, contrast-faint to prominent, boundary-sharp to diffuse, location-lining pores, in matrix, and on surfaces of peds, shades-yellow or brown
Ironstone nodules: 1 to 5 percent
Reaction: strongly acid to slightly acid
Lower part of the Bt Horizon
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 to 6
Texture: sandy clay loam, clay loam
Clay content: 20 to 30 percent
Clay films: location-surfaces of peds, contrast-faint or distinct
Redox accumulations: amount 10 to 25 percent, size-fine or medium, contrast-faint to prominent, boundary-sharp to diffuse, location-lining pores, in matrix, and on surfaces of peds, shades-yellow, brown, or red
Redox depletions: amount-2 to 10, size-fine or medium, contrast-distinct or prominent, boundary-clear or diffuse, location-lining pores or surfaces of peds, shades-gray
Ironstone nodules: 1 to 5 percent
Reaction: moderately acid or slightly acid
Btv Horizon
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 to 6
Texture: sandy clay loam or clay loam
Clay content: 20 to 35 percent
Clay films: location-surfaces of peds, contrast-faint or distinct
Redox accumulations: amount 10 to 35 percent, size-fine or medium, contrast-faint to prominent, boundary-sharp to diffuse, location-lining pores, in matrix, and on surfaces of peds, shades-yellow, brown, or red
Redox depletions: amount-2 to 10, size-fine or medium, contrast-distinct or prominent, boundary-clear or diffuse, location-lining pores or surfaces of peds, shades-gray
Ironstone nodules: 1 to 5 percent
Plinthite nodules: 3 to 8 percent
Reaction: moderately acid or slightly acid
Bt/E Horizon
Bt part
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 to 6
E part
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 2 or 3
Texture: sandy clay loam or clay loam
Clay content: 20 to 35 percent
Clay films: location-surfaces of peds, contrast-faint or distinct
Redox accumulations: amount 25 to 45 percent, size-fine or medium, contrast-faint to prominent, boundary-sharp to diffuse, location-lining pores, in matrix, and on surfaces of peds
Redox depletions: amount-2 to 15, size-fine or medium, contrast-distinct or prominent, boundary-clear or diffuse, location-lining pores or surfaces of peds
Ironstone nodules: 1 to 5 percent
Plinthite nodules: 1 to 5 percent
Reaction: slightly acid or neutral
COMPETING SERIES: These are the no series in the same family. Similar soils are the
Fourche,
Hockley, Townhole, and
Wockley series.
Fourche series: fine-silty family; mixed mineralogy; mesic temperature regime
Hockley series: Plinthic subgroup
Townhole series: loamy-skeletal family; mixed mineralogy; mesic temperature regime
Wockley series: Plinthaquic subgroup
GEOGRAPHIC SETTING:
Parent material: Loamy sediments derived from the Willis Formation of late Pliocene age
Landform: Coastal Plain
Slope: 0 to 2 percent
Mean annual temperature: 67 to 69 degrees F.
Mean annual precipitation: 40 to 48 inches
Precipitation Pattern: Precipitation is fairly uniform throughout the year with slight peaks in the spring and fall. Summertime rainfall is controlled by the influx of tropical moisture.
Frost-free period: 240 to 270 days
Elevation: 175 to 250 feet
Thornthwaite annual P-E indices: 62 to 72
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Hockley, the proposed
Snakecreek, the proposed
Tomball, and the
Wockley series.
Hockley series: well drained and on a higher landscape position
Snakecreek series: somewhat poorly drained and on a lower landscape position
Tomball series: poorly drained and in depressions
Wockley series: somewhat poorly drained and on a lower landscape position
DRAINAGE AND PERMEABILITY: Moderately well drained. Moderately slow permeability. Runoff is low. The soil is saturated for periods up to one month during the winter and spring months and after heavy rainfall events in the summer and fall months from a depth of 18 to 24 inches. In normal years, these soils are saturated for periods up to 2 months during the winter and spring months from a depth of 55 to 80 inches. In abnormally wet years, these soils will reduce for short periods from a depth of 18 to 24 inches.
USE AND VEGETATION: Used mainly as pastureland and cropland. Urban encroachment is common in the eastern portion of this series' extent. The dominant pasture grass is improved coastal bermudagrass. The dominant crop is corn.
DISTRIBUTION AND EXTENT: Southeast Texas; LRR T; MLRA 150A; small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES PROPOSED: Waller County, Texas, 2001.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 12 to 32 inches. (Bt1 and Bt2 horizons)
Ochric epipedon: 0 to 12 inches. (Ap and A horizons)
Argillic horizon: 12 to 80 inches. (Bt1, Bt2, Bt3, Btv, Bt/E horizons)
Glossic horizon: 61 to 80 inches. (Bt/E horizon)
Endosaturation: The zone of saturation at 61 to 80 inches. (Bt/E horizon)
Episaturation: The zone of saturation at 12 to 18 inches. (Bt1 horizon)
Oxyaquic feature: These soils remain saturated for periods up to 2 weeks from a depth of 12 inches to 18 inches during late winter to late spring in most years. (Bt1 horizon)
Additional Comments: This series was formerly included in the Wockley series. Field observations indicate that these soils become saturated but do not reduce in most years.
The assignment of the cation-exchange activity class is supported by laboratory data number S00TX-473-2 from Waller County, Texas.
ADDITIONAL DATA: Laboratory data pending from the Soil Characterization Lab at Texas A&M University on samples S00TX-473-2.
TAXONOMIC VERSION: Soil Taxonomy, Second Edition, 1999