LOCATION NORMANGEE TX+OKEstablished Series
TAXONOMIC CLASS: Fine, smectitic, thermic Udertic Haplustalfs
TYPICAL PEDON: Normangee clay loam - pastureland. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 7 inches; dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; weak medium angular blocky structure; very hard, firm; few dark ferromanganese concretions and few rounded pebbles of quartz; slightly acid; clear wavy boundary. (4 to 9 inches thick)
Bt1--7 to 18 inches, brown (10YR 5/3) clay, dark brown (10YR 4/3) moist; few fine distinct mottles of yellowish brown (10YR 5/6), dark grayish brown (10YR 4/2), and reddish brown (5YR 4/4); moderate medium angular blocky structure; extremely hard, extremely firm; few fine ferromanganese concretions and pebbles of quartz; distinct clay films on peds; medium acid; gradual smooth boundary. (8 to 16 inches thick)
Bt2--18 to 34 inches; brown (10YR 5/3) clay, brown (10YR 4/3) moist; few fine faint mottles of olive brown and yellowish brown; moderate medium and fine angular blocky structure; distinct clay films on peds; extremely hard, extremely firm; distinct clay films on face of peds; neutral; gradual smooth boundary. (12 to 20 inches thick)
Bt3--34 to 44 inches, light yellowish brown (2.5Y 6/4) clay, light olive brown (2.5Y 5/4) moist; common fine and medium distinct mottles of yellowish brown (10YR 5/8) and olive yellow (2.5Y 6/8); weak fine angular blocky structure; extremely hard, extremely firm; few clay films; few fine soft masses of calcium carbonate; moderately alkaline; gradual smooth boundary. (6 to 15 inches thick)
Ck--44 to 64 inches; very pale brown (10YR 7/3) weakly consolidated shale; that has clay texture; yellowish brown (10YR 5/4) moist; massive; few fine distinct mottles of brownish yellow and brown; extremely hard, very firm; common soft masses of calcium carbonate up to about 1/2 inch. i. size; moderately alkaline.
TYPE LOCATION: Anderson County, Texas; about 4.0 miles northwest of Cayuga; about 1.5 miles west of Cayuga, 1.8 miles north of U.S. Highway 287 and 1.75 miles west on county road.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 60 inches. Depth to secondary carbonates is greater than 30 inches. Some pedons lack visible carbonates. The clay content of the control section averages 40 to 50 percent. The COLE values range from .07. to .10 The soil has cracks 1/2 inch wide to a depth of more than 20 inches when dry.
The A horizon has hue of 7.5YR or 10YR, value of 4 to 6, and chroma of 2 to 4. The texture is sandy clay loam, loam, clay loam or their gravelly counterparts. It is hard or very hard when dry. Reaction ranges from medium acid to neutral.
The upper Bt horizon has matrix with hue of 5YR, 7.5YR to 10YR, value of 4 or 5, and chroma of 3 or 4. Reddish and brownish mottles range from few to common. Lower Bt horizons are in shades of brown or olive in hue of 10YR or 2.5Y with or without mottles in shades of yellow, brown, or red. The texture of the Bt horizon is clay, however, some pedons have clay loam lower B horizons. Reaction of the upper Bt horizon ranges from medium acid to moderate;y alkaline. Reaction of the lower Bt horizon ranges from slightly acid to moderately alkaline. Some pedons are calcareous in the lower part. Calcium carbonate in the form of concretions and masses ranges from none to common.
The C horizon is weakly consolidated shale with clay texture that is stratified with clay loam, clay and shaly clay. Colors are in shades of gray, olive, yellow and brown. The reaction ranges from neutral to moderately alkaline. Some pedons are calcareous. Visible carbonates range from none to common.
COMPETING SERIES: There are no other series in the same family. Similar soils are the Axtell, Bazette, Chaney, Crockett, Payne, Ponder and Steedman series. Axtell, Chaney, and Crockett soils have an abrupt texture change between the A and Bt horizon. Bazette and Payne soils lack vertic properties. Ponder soils have sola more than 60 inches thick and Steedman soils have sola 20 to 40 inches thick.
GEOGRAPHIC SETTING: Normangee soils occur on nearly level to moderately sloping uplands. Slope gradients are predominantly 1 to 6 percent, but range from 0 to 8 percent. The soil formed in alkaline marine sediments of shale, clay, and sandy clay underlain in places by sandstone or limestone. Mean annual temperature ranges from 67 F. and mean annual precipitation ranges from 32 to 42 inches. Frost free days range from 220 to 270 days and elevation ranges from 350 to 800 feet. Thornthwaite annual P-E indices are 50 to 70.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the competing Axtell and Crockett series and the Ellis and Wilson soils. Axtell and Crockett soils are on similar positions. The Ellis soils are clayey throughout and are on similar or more sloping positions. Wilson soils are gray throughout and are on flat, wetter positions.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is slow to rapid; Permeability is very slow.
USE AND VEGETATION: Principal use is pasture. A few areas are farmed to cotton, grain sorghum, small grain, or corn. Native vegetation is thin strands of postoak with bluestems, Indiangrass, switchgrass, and grama grasses in open areas.
DISTRIBUTION AND EXTENT: Blackland Prairie and Texas Claypan areas; possibly in the Cross Timbers areas of Texas and Oklahoma. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Anderson County, Texas; 1970.
REMARKS: Formerly included in the Crockett and Payne series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 7 inches, the Ap horizon. (Ap horizon)
Argillic horizon - 7 to 44 inches the Bt horizon. (the Bt horizons)
Soil has high shrink-swell, and cracks when dry.