LOCATION ANOCON TXEstablished Series
The Anocon series consists of very deep, well drained, moderately slowly permeable soils that formed in loamy and clayey slope wash and slope alluvium on plains. These soils are on gently sloping to moderately sloping uplands. Slopes range from 1 to 8 percent.
TAXONOMIC CLASS: Fine, mixed, active, thermic Udic Argiustolls
TYPICAL PEDON: Anocon fine sandy loam--native range. (Colors are for dry soil unless otherwise stated.)
A--0 to 16 inches; brown (10YR 5/3) fine sandy loam, dark brown (10YR 3/3) moist; weak fine granular structure; hard, friable; many fine roots; many fine pores; common wormcasts; slightly acid; gradual smooth boundary. (10 to 20 inches thick)
Bt1--16 to 26 inches; reddish brown (5YR 4/4) sandy clay, dark reddish brown (5YR 3/4) moist; common fine distinct mottles of yellowish red; moderate fine and medium subangular blocky structure; very hard, very firm; many fine roots; thin clay films; few dark concretions; neutral; gradual smooth boundary. (8 to 15 inches thick)
Bt2--26 to 39 inches; brown (7.5YR 5/4) sandy clay, brown (7.5YR 4/4) moist; common fine faint mottles of reddish yellow; coatings on peds are brown (10YR 5/3); strong medium blocky structure; very hard, very firm; common fine roots; thin continuous clay films; few black concretions; noncalcareous; slightly alkaline; gradual smooth boundary. (10 to 35 inches thick)
BCt--39 to 65 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 5/6) moist; few fine faint mottles of light brownish gray; coatings on peds are reddish brown (5YR 5/3); moderate medium subangular blocky structure; very hard, firm; few fine roots; common fine pores; few thin patchy clay films; common black concretions; few slightly cemented medium masses of calcium carbonate; common threads and films of fine gypsum crystals in lower part; calcareous; moderately alkaline.
TYPE LOCATION: Montague County, Texas; From the intersection of Farm Road 103 and 1759 in Nacona, 5.6 miles west and north along Farm Road l759; 0.3 mile east on county road, 0.25 mile southeast on pasture road, 12 feet north in pasture.
RANGE IN CHARACTERISTICS: The range in solum thickness is 60 to about 80 inches.
The A horizon has colors in hue of 5YR to 10YR, value of 4 or 5, and chroma of 2 or 3. It is fine sandy loam or loam. The reaction is slightly acid or neutral.
Some pedons have an AB or BA horizon. It has hue of 5YR or 7.5YR, value of 4 or 5, chroma of 2 to 4. It is loam, sandy loam, sandy clay loam, or clay loam, and slightly acid or neutral.
The Bt horizon has colors in hue of 5YR to 10YR, value of 4 to 6 and chroma 4 to 8. Mottles of these colors range from none to common and from faint to distinct. Grayish mottles are below a depth of 30 inches in some pedons. Texture is clay loam, sandy clay, or clay with clay content of control section averaging from 35 to 45 percent. Reaction ranges from slightly acid to slightly alkaline and is typically noncalcareous.
The BCt horizon has colors in shades of red, yellow, or brown. It is typically mottled with these colors. Texture is sandy clay loam or clay loam. Concretions of calcium carbonate and gypsum crystals range from none to common. The reaction ranges from neutral to moderately alkaline. Some pedons have a C horizon between 60 and 80 inches that is shale or weakly consolidated sandstone interbedded with shale.
COMPETING SERIES: These include the Frankirk, Lawton, Ren and Scullin series. Frankirk soils are drier for longer periods and lack mottles in the Bt horizon. Lawton soils lack mottles in the Bt horizon and contain granitic sand and pebbles in the lower Bt horizon. Ren soils are moderately deep over Permian redbed shales and are in slightly cooler climates. Scullin soils have sola less than 40 inches thick.
GEOGRAPHIC SETTING: These soils are on gently sloping plains. Slopes are mainly 1 to 5 percent but range to 8 percent. These soils formed in slope wash and slope alluvium from sandstone and shale. The average annual temperature is 64 to 65 degrees F.; the average annual precipitation ranges from 28 to 32 inches. Frost free period is 220 to 230 days and elevation ranges from 1000 to 1200 feet. The Thornthwaite P-E index ranges from 44 to 50.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Renfrow, Stoneburg, Truce, and Vernon, and Waurika series. Renfrow soils have vertic properties and are on slightly lower positions. Stoneburg soils have fine loamy control sections and are on similar positions in the landscape. Truce soils lack a mollic epipedon and are on similar or slightly lower positions. Vernon soils are clayey throughout and on slightly higher positions. Waurika soils have albic horizons, are dominated by gray colors, and occur on slightly lower positions.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff on 1 to 5 percent slopes and high on 5 to 8 percent slopes; moderately slow permeability.
USE AND VEGETATION: Used mainly for range but some areas are cultivated to small grains and sorghums. Native vegetation is tall and mid grasses.
DISTRIBUTION AND EXTENT: North-central Texas mainly in the Central Rolling Red Prairies and possibly in Oklahoma. The soil is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Montague County, Texas; 1975.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - A horizon for 0 to 16 inches
Argillic horizon - Bt and BCt horizons 16 to 65 inches.
Udic feature - are dry less than four tenths of the cumulative days in some part of the moisture control section during the growing season.