LOCATION TADINA TXEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, active, thermic Grossarenic Paleustalfs
TYPICAL PEDON: Tadina fine sand--wooded pasture. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 4 inches; yellowish brown (10YR 5/4) fine sand, dark yellowish brown (10YR 4/4) moist; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many fine, medium and coarse roots; many fine pores; slightly acid; clear smooth boundary. (4 to 12 inches thick)
E1--4 to 34 inches; 4 to 34 inches; yellowish brown (10YR 5/4) fine sand, brown (10YR 5/4) moist; single grained; soft, loose, nonsticky and nonplastic, common fine and medium roots; moderately acid; gradual smooth boundary.
E2--34 to 51 inches; light yellowish brown (10YR 6/4) fine sand, yellowish brown (10YR 5/4) moist; single grained; soft, loose, nonsticky and nonplastic; moderately acid; gradual smooth boundary.
E3--51 to 58 inches; very pale brown (10YR 7/4) fine sand, very pale brown (10YR 7/3) moist; single grained; soft, loose, nonsticky and nonplastic; common fine roots; many fine to medium pores; many fine distinct brownish yellow (10YR masses of iron accumulation; moderately acid; clear smooth boundary. (combined thickness of E horizons ranges from 40 to 75 inches)
Bt1--58 to 64 inches; pale brown (10YR 6/3) sandy clay loam, light brownish gray (10YR 6/2) moist; weak fine subangular blocky structure; slightly hard, firm, nonsticky and slightly plastic; common fine roots; common fine and medium pores; common prominent clay films; common fine distinct yellowish brown (10YR 5/6) masses of iron accumulation, common medium prominent dark red (2.5YR 3/6) masses of iron accumulation; strongly acid; clear smooth boundary; (5 to 15 inches thick)
Bt2--64 to 70 inches; very pale brown (10YR 7/3) sandy clay loam, light gray (10YR 7/2) moist; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; few fine roots; many fine to coarse pores; common prominent clay films on surfaces of peds; many medium prominent dark red (2.5YR 3/6) masses of iron accumulations, common medium prominent yellowish brown (5YR 5/6) masses of iron accumulations; 1 percent subrounded siliceous pebbles; strongly acid; gradual smooth boundary. (5 to 20 inches thick)
Bt3--70 to 80 inches; very pale brown (10YR 7/3) sandy clay loam, light gray (10YR 7/2) moist; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; few fine roots; many fine to coarse pores; many medium prominent yellowish brown (5YR 5/6) masses of iron accumulations; common prominent clay films; few fine lenses of white sand grains; 1 percent subrounded siliceous pebbles; strongly acid.
TYPE LOCATION: Colorado County, Texas; from the intersection of Texas Highway 71 and U. S. Highway 90 in Columbus, 0.9 miles north on Texas highway 71, 2.3 miles north on Farm Road 109, and 400 feet north of road in pasture; USGS Frelsburg topographic quadrangle; Latitude: 29, 45, 0 North; Longitude: 96, 32, 50 West.
RANGE IN CHARACTERISTICS: Solum thickness is greater than 80 inches. Mean annual soil temperature ranges from 68 to 72 degrees F. The soil developed in Pleistocene age sediments.
The A and E horizons are sand, fine sand, loamy sand or loamy fine sand They are 40 to 80 inches thick. Reaction is moderately acid to neutral.
The A horizon has hue of 10YR, value of 4 to 7, and chroma of 2 to 4.
The E horizon has hue of 7.5YR or 10YR, value of 5 to 8, and chroma of 2 to 6. The boundary between the E and Bt horizon is wavy to irregular. Redoximorphic features in shades of brown and yellow range from none to common.
BE or E/Bt horizons, where present, have hue of 7.5YR or 10YR, value of 5 to 8, and chroma of 2 to 6. Redoximorphic features in shades of red, yellow, brown or gray range from none to common. Texture of the Bt is fine sandy loam, loam or sandy clay loam. Texture of the E is sand, fine sand, loamy sand, or loamy fine sand. Reaction ranges from very strongly acid to slightly acid.
The Bt horizon has hue of 5YR, 7.5YR or 10YR, value of 5 to 8, and chroma of 1 to 8. Redoximorphic features in shades of red, yellow, brown, or gray range from few to common in the upper part and increase in size and abundance with depth, or the matrix may be mottled with these colors. Texture is fine sandy loam, loam, sandy clay loam, or clay loam. Clay content ranges from 18 to 35 percent. Reaction is very strongly acid to slightly acid. Albic material and skeletans of clean sand comprise up to 15 percent by volume in some pedons. Base saturation ranges from 40 to 75 percent.
COMPETING SERIES: These include the Catilla (TX), Desan (TX), Matilo (TX), Navasan (TX), Padina (TX), Patilo (TX), and Plains (T TX) series. Similar soils include the Arenosa, Faula, Nimrod, and Stidham series. Catilla soils contain more than 5 percent plinthite in the Bt horizon. Desan soils do not have redoximorphic features with chromas of 2 or less in the Bt horizon. Matilo soils have a paralithic contact between 60 and 80 inches. Navasan soils are moderately well drained and have a water table between 3 and 5 feet. Padina soils developed in Tertiary age sediments. Patilo soils are dry in the moisture control section for slightly longer periods and, in addition, Patilo soils are moderately well drained. Plains soils have sola between 60 and 80 inches thick and have mean annual soil temperature ranging from 59 to 64 degrees F. In addition, Plains soils occur in areas that receive significantly less precipitation. Arenosa soils do not have Bt horizons. Faula soils have Bt horizons with lamellae. Nimrod and Stidham soils have A horizons less than 40 inches thick.
GEOGRAPHIC SETTING: Tadina soils are on terraces of the Colorado, Brazos, and Navasota Rivers and their tributaries. Slopes are 0 to 15 percent, with concave and convex surfaces. The soil formed in thick sandy beds of alluvium that appear to have been reworked somewhat by wind. Mean annual temperature ranges from 66 to 70 degrees F; and mean annual precipitation ranges from 35 to 42 inches. Frost free days range from 240 to 280 days, and elevation ranges from 150 to 300 feet. Thornthwaite annual P-E indices are 54 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Chazos, Robco, Tabor, and Faula series. Chazos and Tabor soils are in the fine family, and occur on adjacent landscapes in slightly lower positions. Robco soils have sandy A and E horizons between 20 and 40 inches thick, and occur on adjacent landscapes in slightly lower positions. Faula soils are on similar positions.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoff is negligible on slopes less than 1 percent, very low on 1 to 3 percent slopes, low on 3 to 5 percent slopes, and medium on 5 to 8 percent slopes. A perched water tables is above the argillic horizon for short periods following heavy rainfalls.
USE AND VEGETATION: Mainly brushy rangeland and used for grazing. A few areas are cultivated to peanuts and watermelons. Native vegetation is a scrub forest of post oak, blackjack oak, and scattered hickory, with an understory of greenbrier, sassafras, American beautyberry, yaupon, little bluestem, purpletop, sand lovegrass, low paspalums, low panicums, and splitbeard bluestem.
DISTRIBUTION AND EXTENT: Drainage systems of the Colorado, Brazos, and Navasota Rivers and Their tributaries within the Blackland Prairie and Claypan Prairie of Texas (MLRAs 86 and 87). The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Colorado County, Texas, 1997.
REMARKS: These soils were formerly included in the Padina series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 58 inches. (A and E horizons)
Argillic horizon - 58 to 80 inches. (Bt horizons)
Grossarenic feature - loamy fine sand textures to 58 inches.