LOCATION MILBY TX

Established Series
WLM-SEB-RM-KBH
02/2018

MILBY SERIES

The Milby series consists of very deep, moderately well drained soils that formed in sandy and loamy alluvial sediments of Pleistocene age. These gently sloping soils are on stream terraces. Slope ranges from 0 to 5 percent. Mean annual precipitation is about 1194 mm (47 in) and the mean annual air temperature is about 21.1 degrees C (70 degrees F).

TAXONOMIC CLASS: Loamy, siliceous, active, hyperthermic Arenic Paleudalfs

TYPICAL PEDON: sand, on a southwest-facing, 1 percent slope in rangeland at an elevation of 21 m (69 ft). (Colors are for moist soil unless otherwise stated.)

A--0 to 15 cm (0 to 6 in); brown (10YR 5/3) sand, very pale brown (10YR 7/3) dry; weak fine subangular blocky structure; loose, very friable; many fine and medium roots; strongly acid; clear wavy boundary. (Thickness of the A horizon is 10 to 25 cm [4 to 10 in])

E1--15 to 41 cm (6 to 16 in); pale brown (10YR 6/3) sand, light gray (10YR 7/2) dry; single grain; loose, very friable; common fine and few medium roots; few fine pores; slightly acid; gradual wavy boundary.

E2--41 to 76 cm (16 to 30 in); very pale brown (10YR 7/4) sand, very pale brown (10YR 8/2) dry; single grain; loose, very friable; common fine and few medium roots; few fine pores; slightly acid; abrupt smooth boundary. (Combined thickness of E horizon is 41 to 76 cm [16 to 30 in])

Bt/E--76 to 89 cm (30 to 35 in); light yellowish brown (10YR 6/4) sandy clay loam, very pale brown (10YR 7/4) dry; weak medium and coarse blocky structure; hard, firm; few fine and medium roots, common very fine and few fine pores; common fine prominent yellowish red (5YR 5/8) masses of oxidized iron; the upper 5 cm has about 10 percent by volume clean sand and silt grains that appear to be layered (E); lower part of this material grades into Bt; very strongly acid; abrupt smooth boundary. (Thickness of the Bt/E horizon is 0 to 20 cm [0 to 8 in])

Btg--89 to 112 cm (35 to 44 in); grayish brown (10YR 5/2) sandy clay, light brownish gray (10YR 6/2) dry; moderate medium and coarse prismatic structure parting to moderate medium angular blocky; very hard, firm; few fine and medium roots along faces of prisms; few small slickensides; dark grayish brown (10YR 4/2) clay films on faces of prisms; many fine distinct yellowish brown (10YR 5/8), common fine prominent yellowish red (5YR 5/8) and few medium and coarse prominent dark red (2.5YR 3/6) masses of oxidized iron; very strongly acid; gradual wavy boundary. (Thickness of the Btg horizon is 15 to 38 cm [6 to 15 in])

Bt--112 to 135 cm (44 to 53 in); very pale brown (10YR 7/3) sandy clay loam, very pale brown (10YR 8/3) dry; moderate medium and coarse prismatic structure parting to moderate medium angular blocky; very hard, firm; few fine and medium roots on faces of prisms; brown (10YR 5/3) clay films on faces of prisms; many coarse faint light gray (10YR 7/1), many medium and coarse prominent yellowish brown (10YR 5/6) and dark red (2.5YR 3/6) masses of oxidized iron; very strongly acid; gradual wavy boundary. (Thickness of the Bt horizon is 15 to 38 cm [6 to 15 in])

BC--135 to 178 cm (53 to 70 in); very pale brown (10YR 8/4) sandy loam, very pale brown (10YR 8/4) dry; moderate medium and coarse prismatic structure parting to moderate medium angular blocky; very hard, firm; few fine and medium roots on faces of prisms; many medium and coarse distinct grayish brown (10YR 5/2) and brownish yellow (10YR 6/6) vertical streaks and masses of oxidized iron; strongly acid; abrupt wavy boundary. (Thickness of the BC horizon is 25 to 64 cm [10 to 25 in])

2C--178 to 229 cm (70 to 90 in); light brownish gray (2.5Y 6/2) clay, light gray (2.5Y 7/2) dry; massive, with conchoidal cleavage planes; extremely hard, very firm; few very fine roots on faces of cleavage planes; few slickensides; few dark brown stains on surfaces of cleavage planes; few fine and medium distinct light olive brown (2.5Y 5/4) and few medium prominent pale red (2.5YR 6/2) masses of oxidized iron; strongly acid.

TYPE LOCATION: Jackson County, Texas; from the intersection of U. S. Highway 59 and Farm Road 822 in Edna, Texas, 11.9 miles northwest on Farm Road 822, 250 feet southwest along a fence from Farm Road 822 right-of-way, 35 feet southeast of fence in pasture. Navidad USGS quad; Latitude, 29 degrees, 4 minutes, 26.92 seconds N; Longitude, 96 degrees, 47 minutes, 22.38 seconds W. WGS84. UTM Easting 715172.23 m; UTM Northing 3218217.90 m, UTM Zone 14.

RANGE IN CHARACTERISTICS:

Soil Moisture: A udic soil moisture regime. The soil moisture control section remains dry in some or all parts for 90 or more but less than 180 cumulative days in normal years. December through March are the driest months, while May and June are the wettest.
Mean annual soil temperature: 21.7 to 22.2 (72 To 72 degrees F).
Depth to argillic horizon: 51 to 102 cm (20 to 40 in)

Particle-size control section (weighted average)
Clay content: 27 to 35 percent

A Horizon
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 2 to 4
Texture: sand, fine sand, loamy sand, or loamy fine sand
Reaction: strongly acid to neutral

E Horizon
Hue: 7.5YR or 10YR
Value: 6 to 8
Chroma: 2 to 4
Texture: sand, fine sand, loamy sand, or loamy fine sand
Reaction: strongly acid to neutral

Bt/E Horizon
(Bt part)
Hue: 10YR
Value: 4 to 7
Chroma: 3 to 6

(E part)
Hue: 10YR or 7.5 YR
Value: 6 to 8
Chroma: 2 to 4
Texture: sandy clay or clay loam
Redox concentrations: amount-1 to 8 percent; colors-shades of red, brown or yellow
Reaction: strongly acid or moderately acid

Btg and Bt Horizons
Hue: 10YR or 2.5Y
Value: 4 to 7
Chroma: 2 to 6
Texture: sandy clay loam, clay loam, or sandy clay
Redox concentrations: amount-2 to 25 percent; colors-shades of red, brown or yellow
Reaction: very strongly acid to slightly acid

BC or C (where present) Horizon
Hue: 10YR
Value: 5 to 8
Chroma: 2 to 8
Texture: sandy loam, sandy clay loam, or clay loam
Redox concentrations: amount-2 to 25 percent; colors-shades of red, brown or gray
Reaction: strongly acid to slightly alkaline

2C Horizon
Color: shades of gray or brown
Texture: sandy clay or clay
Redox concentrations: amount-0 to 15 percent; colors-shades of red, brown or yellow
Reaction: strongly acid to neutral

COMPETING SERIES: There are no other series in the same family. Similar soils are the Larton (OK), Larue (TX), and Wolfpen (TX) series.

Larton and Larue soils: have hue redder than 7.5YR and are in the thermic temperature regime
Wolfpen soils: are in the thermic temperature regime

GEOGRAPHIC SETTING:
Parent material: sandy and loamy alluvial terrace deposits of Pleistocene age that have probably been reworked by wind
Landform: stream terrace
Slope: 0 to 5 percent
Mean annual air temperature: 21 to 21.7 degrees C (70 to 71 degrees F)
Mean annual precipitation: 1092 to 1397 mm (43 to 55 in)
Frost-free period: 270 to 300 days
Elevation: 4.6 to 61 m (15 to 122 ft)
Thornthwaite annual P-E indices: 52 to 62

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cieno, Dacosta, Inez, Kuy, Laewest, Morales, and Rupley series.

Kuy and Rupley soils: are on nearby landscapes at similar or slightly higher elevations, and have sandy horizons more than 102 cm (40 in) thick.
The Dacosta, Inez, and Laewest soils: are at slightly lower elevations, and have more than 35 percent clay in the control section.
Cieno soils: have loamy A horizons, are in poorly drained, and in enclosed depressions.
Morales soils: are on slightly lower positions, have loamy A horizons, and glossic properties.

DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is slow. Runoff is very low.

USE AND VEGETATION: Used for livestock grazing. Native vegetation consists of grasses such as little bluestem, Indiangrass, Florida paspalum, brownseed paspalum, and woody vegetation such as post oak, live oak, blackjack oak, yaupon, American beautyberry and greenbriar.

DISTRIBUTION AND EXTENT: Mainly along the central Gulf Coast of south central Texas. Land Resource Region T; MLRA 150A. This series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Jackson County, Texas; 1982.

REMARKS: Edited 04-2015 (KBH) to update the competing series and the geographically associated soils.

Diagnostic horizons and features recognized in this pedon are:
Particle size control section: 76 to 127 cm (30 to 50 in) (Bt/E, Btg, and Bt horizons)
Ochric epipedon: 0 to 76 cm (0 to 30 in) (A and E horizons)
Arenic feature: 0 to 76 cm (0 to 30 in) (A and E horizons)
Argillic horizon: 76 to 135 cm (30 to 53 in) (Bt/E, Btg, and Bt horizons)
Redoximorphic concentrations: 76 to 229 cm (30 to 90 in) (Bt/E, Btg, Bt, BC, and 2C horizons)
Abrupt textural change: At the upper boundary of the Bt/E horizon.

ADDITIONAL DATA: KSSL Lab data available on S1982TX239001, and pedons from Goliad County from local lab.

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

National Cooperative Soil Survey
U.S.A.