LOCATION GASIL TX+OKEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Ultic Paleustalfs
TYPICAL PEDON: Gasil fine sandy loam--pasture. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 8 inches; brown (10YR 5/3) fine sandy loam, brown (10YR 4/3) moist; weak fine granular structure; soft, very friable; common fine roots; few fine pebbles of ironstone; moderately alkaline; clear smooth boundary. (4 to 11 inches thick)
E--8 to 17 inches; very pale brown (10YR 7/3) fine sandy loam, pale brown (10YR 6/3) moist; weak fine granular structure; soft, very friable; common fine roots; few fine pebbles of ironstone; neutral; clear smooth boundary. (0 to 14 inches thick)
Bt1--17 to 30 inches; reddish yellow (7.5YR 6/6) sandy clay loam, strong brown (7.5YR 5/6) moist; few fine distinct red mottles; moderate medium subangular blocky structure; hard, firm; common roots; few fine pebbles of ironstone; few fragments of sandstone up to two inches in length; strongly acid; gradual smooth boundary. (10 to 25 inches thick)
Bt2--30 to 53 inches; brownish yellow (10YR 6/8) sandy clay loam, yellowish brown (10YR 5/8) moist; moderate coarse prismatic structure parting to weak fine and medium subangular blocky; hard, firm; many fine pores and root channels; few fine pebbles of ironstone; few fragments of sandstone up to two inches in length; common medium distinct red (2.5YR 4/8) masses of iron accumulation; strongly acid; gradual smooth boundary. (10 to 30 inches thick)
Bt3--53 to 75 inches; brownish yellow (10YR 6/8) sandy clay loam, yellowish brown (10YR 5/8) moist; many medium distinct red (2.5YR 4/8) mottles; moderate coarse prismatic structure parting to weak fine and medium subangular blocky; hard, firm; many fine pores and root channels; few fine reddish black concretions and masses; few fine pockets of uncoated sand grains; moderately acid.
TYPE LOCATION: Cooke County, Texas; east side of a county road 2.7 miles south of U.S. Highway 82, 2.3 miles east of the junction of U.S. Highway 82 and Farm Road 678 which is 6.9 miles east of Gainesville on U.S. Highway 82.
RANGE IN CHARACTERISTICS: The solum ranges from 60 to more than 80 inches thick. Fine pebbles of ironstone and fragments of sandstone range from none to about 5 percent throughout the solum. Base saturation throughout the argillic ranges from 35 to 65 percent.
The combined thickness of the A and E horizon ranges from 6 to 20 inches. Texture is loamy fine sand or fine sandy loam. Reaction ranges from moderately acid to slightly alkaline. The Ap horizon has hue of 10YR or 7.5YR, value of 4 to 6 and chroma of 2 to 4. The E horizon is one to two units of value greater than the Ap horizon.
The Bt horizon has hue of 10YR, 7.5YR or 2.5Y, value of 5 to 7 and chroma of 4 to 8. Iron accumulations in shades of red, yellow, and brown range from few to common. Grayish zone of iron depletion range from none to few below a depth of 30 inches. Texture is fine sandy loam, loam, or sandy clay loam. Clay content of the upper 20 inches ranges from 18 to 30 percent. Reaction ranges from strongly acid to slightly acid.
COMPETING SERIES: These are the Harrah (OK) and Konsil (TX) series in the same family. Similar soils are the Bastrop, Cobb, Delwin, Dougherty, Duffau, Galey, Grandfield, Konawa, May, Miles, Silstid, Stephenville, Stidham, and Weatherford series. Harrah and Konsil soils have hue redder than 7.5YR in the upper Bt horizon. Bastrop, Cobb, Delwin, Duffau, Grandfield, May, and Miles soils have argillic horizons with a base saturation of more than 75 percent in some part. Dougherty, Silstid, and Stidham soils have sandy A horizons more than 20 inches thick. Galey and Konawa soils have mixed mineralogy. Stephenville and Weatherford soils have sola thickness less than 60 inches.
GEOGRAPHIC SETTING: Gasil soils occupy nearly level to gently rolling uplands. Slopes range from 0 to 12 percent, but are mainly in the range of 1 to 8 percent. The soil formed in weathered beds of loamy material and interbedded sandstone. Mean annual temperature ranges from 62 to 69 degrees F, and mean annual precipitation ranges from 28 to 38 inches. Frost free days range from 225 to 270 days, and elevation ranges from 300 to 850 feet. Thornthwaite P-E indices are 44 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Konsil series and the similar Dougherty, Galey, Konawa, Silstid, and Stidham series and the Truce series. Truce soils have fine textured control sections.
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 12 percent slopes.
USE AND VEGETATION: Used mainly for pasture. Principal cultivated crops are grain sorghum, small grains, and peanuts. Native vegetation is post oak and blackjack oak with an understory of bluestems and other grasses.
DISTRIBUTION AND EXTENT: North-central Texas and southeastern Oklahoma. The series is extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Cooke County, Texas; 1973.
REMARKS: Gasil soils were formerly included with the Galey series. Semiactive cation exchange activity class. Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 17 inches. (Ap and E horizons)
Albic horizon - 8 to 17 inches. (E horizon. Not present in some pedons.)
Argillic horizon - 17 to 75 inches. (Bt1, Bt2 and Bt3 horizons)
Ultic feature - base saturation is less than 75 percent throughout the argillic horizon.
ADDITIONAL DATA: National Soil Survey Laboratory: Cook Co. TX. 371TX-049-1 (71L290-71L292), and Leon Co. S82TX-289-28.
Soil Interpretation Record No.: TX0073; GRADED TX0836