Established Series
Rev. CLN


The Fulshear series consists of very deep, well drained, slowly permeable soils on uplands. These gently sloping to sloping soils formed in alkaline loamy sediments. Slopes range from 1 to 8 percent.

TAXONOMIC CLASS: Fine-loamy, siliceous, active, thermic Typic Hapludalfs

TYPICAL PEDON: Fulshear fine sandy loam - pasture. (Colors are for dry soil unless otherwise stated.)

A--0 to 5 inches; brown (10YR 5/3) fine sandy loam, dark brown (10YR 3/3) moist; weak fine and medium granular structure; hard, very friable; slightly acid; clear smooth boundary. (3 to 10 inches thick)

Bt1--5 to 9 inches; (7.5YR 4/3) sandy clay loam, dark brown (7.5YR 3/3) moist, ped interiors reddish brown (5YR 5/4), reddish brown (5YR 4/4) dry crushed; moderate medium subangular blocky structure; very hard, friable; thin patchy clay films on faces of peds; medium acid; clear smooth boundary. (2 to 5 inches thick)

Bt2--9 to 16 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; ped interiors yellowish red (5YR 5/6), yellowish red (5YR 4/6) dry crushed; moderate medium and coarse angular blocky structure; extremely hard, very firm; thin continuous clay films on faces of peds; few fine FeMn concretions; medium acid; clear wavy boundary. (4 to 8 inches thick)

Bt3--16 to 25 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 4/4) moist; few faint red and yellowish red mottles; moderate medium and coarse angular blocky structure; extremely hard, firm; thin discontinuous clay films; few fine FeMn concretions; medium acid; gradual wavy boundary. (8 to 14 inches thick)

Bt4--25 to 36 inches; red (2.5YR 5/8) sandy clay loam, red (2.5YR 4/8) moist; weak coarse angular blocky structure; very hard, friable; few patchy clay films; slightly acid; gradual wavy boundary. (8 to 15 inches thick)

BC1--36 to 50 inches; light red (2.5YR 6/8) sandy clay loam, red (2.5YR 5/8) moist; weak coarse subangular blocky structure; hard, friable; few fine weakly cemented calcium carbonate concretions; mildly alkaline; gradual wavy boundary. (10 to 20 inches thick)

BC2--50 to 80 inches; reddish yellow (5YR 6/8) fine sandy loam, yellowish red (5YR 5/8) moist; few thin strata of red sandy clay loam; weak coarse prismatic structure; slightly hard, very friable; few soft masses of calcium carbonate; mildly alkaline.

TYPE LOCATION: Fort Bend County, Texas; about 15 miles west of Rosenberg, 250 feet northwest of small barn that is 600 feet north of U. S. 90A and 0.3 mile east of San Bernard River.

RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 80 inches. Depth to soft powdery secondary carbonates ranges from 28 to 60 inches.

The A horizon has hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 2 to 4. It is a loam, fine sandy loam or loamy fine sand. Reaction ranges from medium acid to neutral.

The Bt1 and Bt2 horizons have hue of 7.5YR or 5YR, value of 4 or 5, and chroma of 2 to 6. The Bt1 is sandy clay loam or clay loam. The Bt2 horizon is sandy clay, clay loam or clay. The weighted average clay content of the upper Bt ranges from 28 to 35 percent. Reaction ranges from medium acid to neutral.

The Bt3 and Bt4 horizons have hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 3 to 8. They are sandy clay loam, clay loam or sandy clay. Reaction is medium acid through moderately alkaline.

The BC and C horizons have hue of 2.5YR or 5YR, value of 4 to 6, and chroma of 6 to 8. They are clay loam, sandy clay loam, or fine sandy loam. Some pedons contain strata of other textures. Reaction ranges from neutral to moderately alkaline. Concretions of calcium carbonate range from 2 to 10 percent by volume.

COMPETING SERIES: These include the Alto series in the same family and the similar Kenefick, Arriola, Spurger and Yeaton series. Alto soils have sola 40 to 60 inches thick over weathered glauconitic materials. Kenefick soils have base saturation of 60 percent or less throughout the soil profile. Arriola, Spurger and Yeaton soils are in a fine family.

GEOGRAPHIC SETTING: Fulshear soils are on uplands, mainly along breaks to natural drains. Slopes are convex and gradients range from 1 to 8 percent. The soil formed in alkaline loamy sediments of Pleistocene age. The climate is warm and humid. Mean annual precipitation is 40 to 45 inches and it is about evenly distributed throughout the year. The mean annual temperature is 68 to 70 degrees F., and the Thornthwaite annual P-E index is 50 to 70.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Benard, Edna, Hockley, Katy, Kenny and Lake Charles series. Benard, Edna, Katy, and Lake Charles soils have low chroma mottling due to wetness. In addition, Benard and Edna soils have a COLE of more than 0.09. Hockley and Katy soils have fine-loamy control sections. Kenny soils have grossarenic surface layers. Lake Charles soils have intersecting slickensides.

DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; slow permeability.

USE AND VEGETATION: Mostly in pastures of Bermuda grass or tall bunch grasses such as andropogons, panicums, and paspalums. A small acreage is used for growing corn, cotton, and sorghums.

DISTRIBUTION AND EXTENT: Mainly in the Gulf Coast Prairie of southeastern Texas between Houston and Victoria. The series is of small extent.


SERIES ESTABLISHED: Fort Bend County, Texas; 1956.

REMARKS: Classification changed 8/90 from fine, mixed, thermic Udic Haplustalfs to fine-loamy, siliceous, thermic Typic Hapludalfs based on data by TAMU.

Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - 0 to 5 inches.

Argillic horizon - 5 to 36 inches.

National Cooperative Soil Survey