LOCATION SHATRUCE TX
Established Series
Rev. JDM-GLL-CLN
12/2013
SHATRUCE SERIES
The Shatruce series consists of soils that are well drained, slowly permeable, and moderately deep to claystone bedrock. These soils formed in residuum from claystone and colluvium and occur on backslopes of ridges. Slope is dominantly about 35 percent, but ranges from 8 to 50 percent. Mean annual precipitation is about 813 mm (32 in) and the mean annual temperature is about 18.3 degrees C (65 degrees F).
TAXONOMIC CLASS: Fine, mixed, superactive, thermic Typic Paleustalfs
TYPICAL PEDON: Shatruce gravelly sandy loam, very rubbly on a 35 percent slope, in rangeland.
(Colors are for dry soil unless otherwise stated.)
The Surface is covered with 15 percent boulders and 45 percent stones that are comprised of silica and iron oxide cemented conglomerate. The average distance between stones is 0.5 m (2 ft) and between boulders is 1 m (3 ft).
A--0 to 5 cm (0 to 2 in); dark grayish brown (10YR 4/2) gravelly sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, friable; many fine and few medium roots; 27 percent by volume gravel of conglomerate, quartz, and sandstone less than 75 mm (3 in) across; neutral; clear smooth boundary. Thickness is 3 to 15 cm (1 to 6 in)
E--5 to 36 cm (2 to 14 in)ches; very pale brown (10YR 8/3) gravelly sandy loam, very pale brown (10YR 7/3) moist; weak fine subangular blocky structure; hard, friable; common fine and few medium roots; 27 percent by volume quartz and sandstone gravel less than 50 mm (2 in) across; slightly acid; abrupt smooth boundary. Thickness is 5 to 41 cm (2 to 16 in)
Bt1--36 to 51 cm (14 to 20 in); red (2.5YR 4/6) clay, dark red (2.5YR 3/6) moist; moderate medium blocky structure; extremely hard, very firm; few fine and medium roots; common clay films on faces of peds; very strongly acid; gradual wavy boundary. Thickness is 10 to 30 cm (4 to 12 in)
Bt2--51 to 66 cm (20 to 26 in); yellowish red (5YR 5/6) clay, yellowish red (5YR 4/6) moist; few fine faint brown (7.5YR 5/4) and yellowish brown (10YR 5/6) mottles; moderate medium blocky structure; extremely hard, very firm; few fine and medium roots; common clay films on faces of peds; very strongly acid; gradual wavy boundary. Thickness is 10 to 30 cm (4 to 12 in)
BCt--66 to 86 cm (26 to 34 in); reddish yellow (7.5YR 6/6) clay, strong brown (7.5YR 5/6) moist; few fine faint reddish and brownish mottles; weak coarse blocky structure; extremely hard, very firm; few fine and medium roots; few patchy clay films on faces of peds; very strongly acid; gradual wavy boundary. Thickness is 10 to 40 cm (4 to 16 in)
Cd--86 to 203 cm (34 to 80 in); grayish brown (2.5Y 5/2) noncemented claystone bedrock, dark grayish brown (2.5Y 4/2) moist; few pockets, 5 to 15 cm (2 to 6 in) in diameter, of very dusky red (2.5YR 2/2) mottles; common discontinuous strata 0.6 to 10 cm (1/4 to 4 in) thick of light yellowish brown (10YR 6/4) that parts to medium angular fragments with clay loam texture; few fine and medium roots throughout; strongly acid.
TYPE LOCATION: Palo Pinto County, Texas; from the intersection of U. S. Highway 281 and Farm Road 2256 on the south edge of Mineral Wells, 5.6 miles south on U. S. Highway 281, 45 feet west in rangeland.
RANGE IN CHARACTERISTICS:
Soil Moisture: Typic-ustic soil moisture regime
Depth to bedrock: 51 to 102 cm (20 to 40 in)
Combined thickness of the A and E horizons: 8 to 51 cm (3 to 20 in)
Surface fragments: 15 to 70 percent total; 3 to 50 percent boulders; 25 to 50 percent by stones; silica and iron oxide cemented conglomerate or sandstone that ranges from 20 cm (8 in) to 7.6 m (25 ft) across the long axis and from 10 cm (4 in) to 2.5 m (8 ft) thick
Particle-size control section (weighted average)
Clay content: 35 to 60 percent
Rock fragments: 0 to 3 percent by volume
A Horizon
Hue: 7.5YR, 10YR
Value: 4 to 6
Chroma: 2 to 4
Texture: gravelly or very gravelly sandy loam or fine sandy loam
Clay content: 5 to 20 percent
Rock fragments: 15 to 50 percent by volume; mainly quartz, sandstone, or conglomerate gravel, but some pedons may contain cobbles or stones
Reaction: medium acid to neutral
E Horizon
Hue: 7.5YR, 10YR
Value: 5 to 8
Chroma: 2 to 4
Texture: gravelly or very gravelly sandy loam or fine sandy loam
Clay content: 5 to 20 percent
Rock fragments: 15 to 50 percent by volume; mainly quartz, sandstone, or conglomerate gravel, but some pedons may contain cobbles or stones
Reaction: medium acid to neutral
Bt Horizons
Hue: 2.5YR, 5YR
Value: 3 to 5
Chroma: 3 to 8
Texture: clay, sandy clay, or clay loam
Clay content: 35 to 60 percent
Rock fragments: 0 to 3 percent by volume
Reaction: very strongly acid to medium acid
BC Horizon
Hue: 7.5YR, 10YR, 2.5Y
Value: 3 or 5
Chroma: 3 to 8
Texture: clay, sandy clay, or clay loam
Mottles: faint in shades of reddish and brownish occur in some pedons
Clay content: 35 to 60 percent
Rock fragments: 0 to 3 percent by volume
Reaction: strongly acid to slightly acid
Cd Horizon
Colors: shades of brown, red and olive
Texture: noncemented claystone or dense clay bedrock
Clay content: 35 to 60 percent
Rock fragments: 0 to 3 percent by volume
Reaction: very strongly acid to slightly acid
COMPETING SERIES: These are the
Wichita and
Winters series in the same family. Similar soils include the
Castell,
Cona,
Hamby,
Pedernales, and
Voca series.
Castell soils: formed in gneiss and have hue yellower than 5YR in the Bt horizons
Cona soils: are wetter in the soil moisture control section during the growing season and occur in the West
Cross Timbers (MLRA 84B)
Hamby and
Pedernales soils: are more than 152 cm (60 in) deep to bedrock and have higher reaction in Bt horizons
Voca soils: are more than 152 cm (60 in) deep to bedrock and formed from slope alluvium and residuum of pre-Cambrian age grus and granite.
Wichita and
Winters soils: are more than 152 cm (60 in) deep to bedrock and occur on terraces
GEOGRAPHIC SETTING:
Parent material: gravelly colluvium over clayey residuum derived from conglomerate and claystone of Pennsylvanian age
Landscape: hills
Landform: ridges and escarpments
Slope: dominately 20 to 50 percent but ranges from 8 to 50 percent
Mean annual precipitation: 660 to 864 mm (26 to 34 in)
Thornthwaite annual P-E index: 40 to 50
Mean annual air temperature: 17.2 to 18.9 degrees C (63 to 66 degrees F)
Frost-free period: 210 to 240 days
Elevation: 228.6 to 457.2 m (750 to 1,500 ft)
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Exray and
Truce series and the
Bonti,
Owens,
Set,
Vashti, and
Weswind series.
Bonti soils: occur on higher summits of ridges and have a paralithic contact of sandstone at 51 to 102 cm (20 to 40 in).
Exray soils: occur on higher shoulders of ridges and have a paralithic contact of sandstone at 25 to 51 cm (10 to 20 in).
Owens soils: occur on noseslopes of more eroded areas and have clayey suface textures.
Set soils: occur on similar positions on backslopes of ridges and below on low knolls and have fine-silty particle-size control sections.
Truce soils: occur on lower footslope positions and are more than 102 cm (40 in) deep to claystone bedrock.
Vashti soils: occur on summits and structural benches of ridges and have fine-loamy particle-size control sections.
Weswind soils: occur on lower footslopes positions and are more than 102 cm (40 in) deep to bedrock.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is slow. Runoff is very high.
USE AND VEGETATION: Used as wildlife land or rangeland. Some areas are inaccessible to domestic livestock. Principal native grasses are little bluestem, silver bluestem, sideoats grama, dropseeds, and annuals, with an overstory of post oak, elm, and ash trees. Forbs include prairie clovers, western ragweed, bundleflower, and lespedeza. Whitebrush, sumac, and condalia occur in various amounts.
DISTRIBUTION AND EXTENT: North-central Texas; MLRA 80B - Texas North-Central Prairies. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Palo Pinto County, Texas; 1979.
REMARKS: This soil has been formerly mapped as a component of the bouldery Truce association. Classification was changed 6/90 from Ultic subgroup to Typic based on base saturation data collected from 13 pedons in Palo Pinto and Jack Counties, Texas.
Edited 12/2013 (RFG-SCP): Changed to tabular format and included metric values. Updated the competing series, geographic setting, and associated soils sections.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 36 cm (0 to 14 in)(A and E horizons)
Argillic horizon: 36 to 66 cm (14 to 26 in)(Bt horizons)
Paleustalfs feature: abrupt texture change at 36 cm (14 inches)
Densic Material: 86 to 203 cm (34 to 80 inches)(Cd horizon)
ADDITIONAL DATA: None
Taxomomic Version: Keys to Soil Taxonomy, Eleventh Edition, 2010
National Cooperative Soil Survey
U.S.A.