LOCATION PADINA TXEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, active, thermic Grossarenic Paleustalfs
TYPICAL PEDON: Padina fine sand--wooded pasture. (Colors are for dry soil unless otherwise stated.)
A--0 to 8 inches; pale brown (10YR 6/3) fine sand, brown (10YR 5/3) moist; single grained; loose; common fine, medium and coarse roots; moderately acid; clear smooth boundary. (4 to 22 inches thick)
E--8 to 49 inches; very pale brown (10YR 7/4) fine sand, light yellowish brown (10YR 6/4) moist; single grained; loose; few fine and medium roots; moderately acid; clear wavy boundary. (35 to 72 inches thick)
Bt1--49 to 65 inches; very pale brown (10YR 7/3) sandy clay loam, pale brown (10YR 6/3) moist; weak coarse angular blocky structure; very hard, very firm, sticky and plastic; few fine roots; few fine pores; thin patchy clay films; common coarse distinct reddish yellow (5YR 6/6) masses of iron accumulation, few fine distinct strong brown (7.5YR 4/6) masses of iron accumulation, and few light gray (10YR 7/2) iron depletions; strongly acid; gradual smooth boundary. (8 to 28 inches thick)
Bt2--65 to 82 inches; white (10YR 8/2) sandy clay loam, light gray (10YR 7/2) moist; weak coarse angular blocky structure; hard, firm, sticky and plastic; few fine roots; few fine pores; few thin patchy clay films; many coarse prominent red (2.5YR 4/6), and common medium prominent reddish yellow (7.5YR 6/6) masses of iron accumulation; strongly acid.
TYPE LOCATION: Falls County, Texas; from Bremond, Texas; 4.6 miles north on Texas Highway 14; then southeast on a county road 0.6 mile, and 100 feet north of county road in a wooded pasture.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 65 to more than 100 inches.
The A and E horizons are loamy fine sand or fine sand. They are 40 to 80 inches thick. Reaction is medium acid to neutral unless limed.
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.
The Bt horizon has hue of 5YR, 7.5YR or 10YR, value of 5 to 8 and chroma of 1 to 8 with varying amount of reddish, yellowish, brownish, and grayish redoximorphic features. It is dominantly sandy clay loam but ranges from fine sandy loam to clay loam with a clay content of 18 to 35 percent. Albic material and skeletans of clean sand comprise up to 15 percent by volume in some pedons. It is slightly acid to strongly acid. Base saturation is 40 to 75 percent.
COMPETING SERIES: These include the Catilla, Desan, Matilo, Navasan, and Patilo series. Similar soils include the Arenosa, Eufaula, 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 that are due to wetness. 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. Patilo soils are dry in the moisture control section for longer periods. Arenosa soils do not have Bt horizons. Eufaula soils have Bt horizons in lamellae. Nimrod and Stidham soils have A horizons less than 40 inches thick.
GEOGRAPHIC SETTING: Padina soils are on uplands and high terraces. Slopes are 0 to 15 percent, with concave and convex surfaces. The soil formed in thick sandy beds that appear to have been reworked somewhat by wind. The 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 range from 250 to 700 feet. Thornthwaite annual P-E indices are 54 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Arenosa and Eufaula series, and the Silstid series. Silstid soils have sandy surface layers 20 to 40 inches thick.
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 15 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, bluejack 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: Mainly in the sandy timbered areas of Texas that are east and south of the Blackland Prairies. The series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Falls County, Texas, 1976.
REMARKS: These soils were formerly included in the Patilo series.
Active cation exchange activity class. Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 49 inches. (A and E horizons)
Argillic horizon - 49 to 82 inches. (Bt1 and Bt2 horizons)
Grossarenic feature - loamy fine sand textures to 49 inches.
Soil Interpretation Record No.: TX0551