LOCATION RUMLEY TX
Established Series
Rev. JEA:CLN
07/2022
RUMLEY SERIES
The Rumley series consists of very deep, well drained, moderately permeable soils that formed in loamy and calcareous alluvial sediments. These nearly level and gently sloping soils are on stream terraces. Slopes range from 0 to 3 percent.
TAXONOMIC CLASS: Fine-loamy, carbonatic, thermic Udic Calciustolls
TYPICAL PEDON: Rumley silty clay loam--in cropland. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; moderate very fine subangular blocky and granular structure; hard, friable; many fine and medium roots; few fragments of snail shells; few fine strongly cemented calcium carbonate concretions; strongly effervescent; moderately alkaline; abrupt smooth boundary. (0 to 8 inches thick)
A--6 to 14 inches; dark grayish brown (10YR 4/2) silty clay loam, very dark grayish brown (10YR 3/2) moist; moderate very fine and fine subangular blocky structure; hard, firm; common fine roots; few fragments of snail shells; few fine strongly cemented calcium carbonate concretions; strongly effervescent; moderately alkaline; gradual smooth boundary. (4 to 12 inches thick)
Bk1--14 to 26 inches; brown (10YR 5/3) silty clay, brown (10YR 4/3) moist; moderate fine subangular blocky structure; hard, firm; few fine roots; common fine and few medium strongly cemented calcium carbonate concretions; few soft masses of calcium carbonate; strongly effervescent; moderately alkaline; gradual smooth boundary. (8 to 18 inches thick)
Bk2--26 to 32 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/4) moist; moderate fine subangular blocky structure; hard, firm; few fine roots; about 5 percent by volume fine and medium strongly cemented calcium carbonate concretions; few soft masses of calcium carbonate; violently effervescent; moderately alkaline; clear smooth boundary. (0 to 10 inches thick)
Bk3--32 to 48 inches; brownish yellow (10YR 6/6) gravelly clay loam, yellowish brown (10YR 5/6) moist; weak fine subangular blocky structure; hard, friable; few fine roots; about 30 percent by volume of fine and medium strongly cemented calcium carbonate concretions; about 10 percent by volume of soft masses of calcium carbonate; violently effervescent; moderately alkaline; gradual smooth boundary. (10 to 20 inches thick)
Bk4--48 to 63 inches; reddish yellow (7.5YR 6/6) clay loam, strong brown (7.5YR 5/6) moist; weak fine subangular blocky structure; hard, friable; about 15 percent by volume of fine and medium strongly cemented calcium carbonate; about 15 percent by volume of soft masses of calcium carbonate; extremely effervescent; moderately alkaline.
TYPE LOCATION: Lampasas County, Texas; from U. S. 281 in Lampasas, 10.7 miles east on Farm Road 580; 400 feet east on an east facing slope; in cropland.
RANGE IN CHARACTERISTICS: Solum thickness is greater than 60 inches. The fine earth fraction is clay loam, silty clay loam, or silty clay with silicate clay content ranging from 25 to 35 percent. Particles coarser than very fine sand range from 15 to 40 percent and are mainly concretions of calcium carbonate. Some Bk horizons contain enough strongly cemented concretions to be gravelly. The weighted average calcium carbonate equivalent in the 10- to 40-inch control section ranges from 40 to 60 percent. Depth to a distinct and contrasting calcic horizon ranges from 28 to 42 inches.
The A horizons have hue of 10YR or 7.5YR, value of 3 to 5, and chroma of 2 or 3. Thickness is 10 to 20 inches.
The Bk1 and Bk2 horizons have hue of 10YR or 7.5YR, value of 5 or 6, and chroma of 3 to 6. Pitted concretions of calcium carbonate, 1 to 5 mm across, range from few to common and makes up less than 10 percent by volume. Soft masses and/or threads of calcium carbonate range from few to common. Calcium carbonate equivalent of the fine earth fraction ranges from 25 to 35 percent. Some pedons contain a Bw horizon that is calcareous.
The Bk3 and Bk4 horizons have hue of 10YR or 7.5YR, value of 6 or 7, and chroma of 4 to 6. Concretions, 1 to 10 mm across, soft masses, films and threads of calcium carbonate range from common to many and make up 10 to 35 percent by volume. Calcium carbonate equivalent of the fine earth fraction ranges from 40 to 50 percent.
COMPETING SERIES: These are the
Bolar,
Carbengle,
Sunev, and
Topsey series in the same family and the similar
Lewisville,
Nuvalde,
Oakalla and
Venus series. The Bolar soils have a lithic contact within 40 inches of the surface. Carbengle soils have a paralithic contact within 40 inches of the surface. Sunev soils contain more finely divided lime and less concretions of calcium carbonates in the upper Bk and have a less distinct calcic horizon. Topsey soils have sola less than 40 inches over shaly and marly sediments. Lewisville, Nuvalde, and Venus soils have less than 40 percent calcium carbonate equivalent in the 10- to 40-inch control section. Oakalla soils have mollic epipedons more than 20 inches thick.
GEOGRAPHIC SETTING: Rumley soils are on nearly level to gently sloping stream terraces. Slopes range from 0 to 3 percent. The climate is dry subhumid, mean annual precipitation ranges from 25 to 32 inches, and mean annual temperature ranges from 65 to 68 degrees F. Thornthwaite P-E indices range from 40 to 52.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the competing
Oakalla and
Sunev soils and the
Brackett,
Lampasas,
Nuff, and
Seawillow soils. Oakalla and Sunev soils are on lower positions. Brackett soils are on higher slopes and have an ochric epipedon. Lampasas soils are on nearby uplands and have a lithic contact. Nuff soils are on slightly higher upland positions and have a solum less than 40 inches thick. Seawillow soils are on similar positions but have ochric epipedons.
DRAINAGE AND PERMEABILITY: Well drained. Slow to medium runoff. Moderate permeability.
USE AND VEGETATION: Used mainly for cropland. Oats and wheat are the principal crops.
DISTRIBUTION AND EXTENT: Mainly in Texas, along streams in the Grand Prairie. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Lampasas County, Texas; 1989.
REMARKS: This soil was formerly included with the Lewisville series.
The classification was changed 11/89 from Typic Calciustolls to Udic Calciustolls.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 0 to 14 inches.
Cambic horizon - 14 to 26 inches.
Calcic horizon - 26 to 63 inches.
National Cooperative Soil Survey
U.S.A.