LOCATION HICOTA TXEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, thermic Typic Glossudalfs
TYPICAL PEDON: Hicota very fine sandy loam--pasture.
(Colors are for moist soil unless otherwise stated.)
A--0-4 inches, brown (10YR 4/3) very fine sandy loam; very pale
brown (10YR 7/3) dry; weak fine granular structure; slightly hard, very friable; common fine grass roots; slightly acid; clear smooth boundary. (3 to 12 inches thick)
E--4-14 inches, light yellowish brown (10YR 6/4) very fine sandy loam; very pale brown (10YR 7/3) dry; weak fine granular structure; slightly hard, very friable; common fine grass roots; medium acid; gradual wavy boundary. (4 to 17 inches thick)
E/Bt--14-32 inches, light yellowish brown (10YR 6/4) very fine
sandy loam; very pale brown (10YR 7/3) dry; massive; soft, very friable; about 25 percent masses of brown (7.5YR 5/4) loam 5 to 20 mm across (Bt); weak fine granular structure; slightly hard, very friable; common fine and medium pores and bridged sand grains in brown masses; few fine roots; medium acid; clear irregular boundary. (8 to 22 inches thick)
Bt/E1--32-44 inches, yellowish brown (10YR 5/6) loam; common
medium distinct strong brown (7.5YR 5/6) mottles and few fine distinct grayish brown mottles in the lower part; moderate coarse prismatic structure parting to weak medium subangular blocky structure; very hard, firm; few fine roots; common fine and medium pores; patchy clay films; about 20 percent white (10YR 8/1) uncoated sand and silt in tongues and on vertical ped faces 2 to 20 mm wide and 5 to 10 cm long (E); very strongly acid; gradual smooth boundary. (4 to 19 inches thick)
Bt/E2--44-54 inches, yellowish brown (10YR 5/6) clay loam; common medium distinct light brownish gray (10YR 6/2) and prominent red (2.5YR 4/6) mottles; moderate coarse prismatic structure parting to weak medium subangular blocky structure; very hard, firm; few roots, mostly between peds; common fine and medium pores; about 5 percent white (10YR 8/1) sand and silt on prism faces (E); thick clay films; very strongly acid; gradual smooth boundary. (7 to 23 inches thick)
Bt1--54-67 inches, gray (10YR 6/1) clay loam; common medium
prominent dark red mottles (2.5YR 3/6) and common medium distinct yellowish brown (10YR 5/6) mottles; moderate medium blocky structure; extremely hard, very firm; few fine roots mostly between peds; many clay films and few gray (10YR 5/1) clayflows; few streaks of uncoated sand and silt; very strongly acid; gradual smooth boundary. (10 to 22 inches thick)
Bt2--67-80 inches, light brownish gray (2.5Y 6/2) clay; common
medium prominent dark red (2.5YR 3/6) mottles and common medium distinct yellowish brown (10YR 5/6) mottles; moderate coarse angular blocky structure parting to moderate medium blocky structure; extremely hard, very firm, sticky; few fine roots; few gray (10YR 5/1) clayflows; common tilted wedge shaped slickensides up to 2 inches across, some of which intersect; many shiny pressure faces; few streaks of uncoated sand and silt; very strongly acid.
TYPE LOCATION: Lamar County, Texas; from the Square in Paris, 11.8 miles north on U.S. Highway 271, 1.3 miles east on oiled county road and 350 yards south.
RANGE IN CHARACTERISTICS: The solum is more than 80 inches deep. The control section has 8 to 18 percent clay. Depth to mottles with chromas of 2 or less range from 30 to 48 inches.
The A or Ap horizon has colors with hue of 7.5YR or 10YR, value of 4 or 5, and chroma of 2 to 4. The texture is very fine sandy loam, fine sandy loam, or loam. The reaction is medium acid or slightly acid.
The E horizon has colors with hue of 7.5YR or 10YR, value of 5 or 6, and chroma of 3 or 4. Some pedons have a BE horizon with chroma of 6. The texture is very fine sandy loam, fine sandy loam or loam. The reaction ranges from strongly acid to slightly acid.
The E material of the E&B horizon has colors with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 3 or 4. The isolated spots of B material make up 20 to 50 percent of the horizon and have hue of 7.5YR or 10YR, value of 4 or 5, and chroma of 4 to 8. The spots have bridged sand grains and common fine and medium pore. They are fine sandy loam, very fine sandy loam, or loam. The reaction is strongly acid or medium acid.
The Bt/E horizons have colors with hue of 7.5YR or 10YR, value of 5 or 6, and chroma of 4 to 8. The uppermost 30 inches, mottles are few to common and are red and yellowish red. Below 30 inches, mottles are gray, light gray, grayish brown, and light brownish gray. Tongues and vertical streaks of uncoated sand and silt grains make up about 5 to 40 percent of these horizons. The B21t&A2 and B22t horizons are very fine sandy loam, loam, or clay loam. The texture is very fine sandy loam, loam, or clay loam. The reaction ranges from very strongly acid to medium acid.
The Bt1 and Bt2 horizons are mottled gray, yellow, brown, and red. A few thin streaks and pockets of uncoated sand and silt grains are common. Texture is clay loam, sandy clay loam, or clay. Reaction ranges from very strongly acid to medium acid.
COMPETING SERIES: There are no competing series in this family. Soils in similar families include the Bernaldo, Elysian, Fred, Freestone, Frizzell, Leverett, Messer, Ozan, Tippo, and Wanilla series. Bernaldo, Fred, and Freestone soils are more than 18 percent clay in the control section. Elysian soils do not have tongues extending through the upper part of the Bt horizon. Frizzel, Leverett, Messer, and Tippo soils have silty particle-size families. Ozan and Wanilla soils have wetness mottles in the upper part of the Bt horizon.
GEOGRAPHIC SETTING: Hicota soils are on nearly level and gently sloping terrace level 2 or 3 along the Red River. They are on circular or oblong mounds, 2 to 4 feet high and 35 to 85 feet across. Slopes are 0 to 3 percent. Hicota soils formed in loamy sediments. Near the type location, the average annual precipitation is about 45 inches, the average annual temperature is about 63 degrees F, and the Thornthwaite P-E index is about 68
GEOGRAPHICALLY ASSOCIATED SOILS: Associated soils are those of the the competing Bernaldo and Freestone series and the Annona and Whakana series. Annona soils have a fine textured control section. Whakana are loamy soils located on similar positions.
DRAINAGE AND PERMEABILITY: Hicota soils are moderately well drained; have slow runoff; and have slow permeability. A seasonal water table is within a depth of 3 to 5 feet during winter and spring months.
USE AND VEGETATION: Most areas have been cleared of timber and are used as pasture. A few areas are used for soybeans and small grains. Native vegetation is post oak, red oak, hickory, and elm with an understory of pinehill bluestem, beaked panicum, longleaf uniola, purpletop, and low panicums. Pine trees are in some areas.
DISTRIBUTION AND EXTENT: The Hicota soils are mainly in north-central Texas and possibly in southern Oklahoma. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Lamar County, Texas; 1975.
REMARKS: These soils have been included in the Freestone series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 14 inches, the A and E horizons.
Argillic horizon - 14 to 88 inches, the E/Bt, Bt/E and Bt horizons.
Glossic feature, the upper part of the argillic horizon has more than 15 percent E materials.
ADDITIONAL DATA: Use of the field kit indicates that the base saturation in the typifying pedon is 44 percent and Ca+Mg is 4.0 me/100 grams of soil.
Texas Highway Department Laboratory Data 73-211R thru 73-213R.