LOCATION LULA OK+KS MOEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Typic Argiudolls
TYPICAL PEDON: Lula silt loam--rangeland. (Colors are for moist soil unless otherwise stated.)
A--0 to 10 inches; very dark grayish brown (10YR 3/2) silt loam, dark grayish brown (10YR 4/2) dry; moderate medium granular structure; hard, friable; medium acid; gradual smooth boundary. (6 to 16 inches thick)
BA--10 to 18 inches; dark reddish brown (5YR 3/3) silty clay loam, reddish brown (5YR 4/3) dry; strong medium granular structure; hard, friable; medium acid; gradual smooth boundary. (6 to 14 inches thick)
Bt1--18 to 32 inches; dark reddish brown (2.5YR 3/4) silty clay loam, reddish brown (2.5YR 4/4) dry; common fine faint dark red mottles; moderate medium blocky structure; hard, firm; clay films on faces of peds; few fine black concretions; strongly acid; gradual smooth boundary. (10 to 28 inches thick)
Bt2--32 to 52 inches; dark reddish brown (2.5YR 3/4) silty clay loam, reddish brown (2.5YR 4/4) dry; few fine faint dark red mottles; moderate medium blocky structure; very hard, firm; clay films on faces of peds; few fine black concretions; few coarse chert and limestone fragments less than 76 mm in diameter; neutral; abrupt wavy boundary. (0 to 24 inches thick)
R--52 to 55 inches; hard limestone bedrock.
TYPE LOCATION: Craig County, Oklahoma; about 4 miles west and 1 mile north of Centralia; 2,000 feet east and 1,000 feet south of the northwest corner of sec. 19, T. 27 N., R. 18 E.
RANGE IN CHARACTERISTICS: Solum thickness and depth to limestone bedrock ranges from 40 to 60 inches. Thickness of the mollic epipedon is 10 to more than 20 inches.
A horizon:
Hue: 5YR to 10YR
Value: 2 or 3
Chroma: 2 or 3
Texture: loam or silt loam
Reaction: medium or slightly acid.
BA horizon:
Hue: 5YR to 10YR
Value: 3 or 4
Chroma: 3 or 4
Texture: loam, silt loam, clay loam, or silty clay loam
Reaction: medium or slightly acid.
Bt horizon:
Hue: 2.5YR to 7.5YR
Value: 3 or 4
Chroma: 4 to 6
Texture: clay loam or silty clay loam.
Reaction: strongly to slightly acid in the upper part and medium acid to neutral in the lower part.
The R layer is hard fractured limestone bedrock that is tilted less than 20 degrees from horizontal.
COMPETING SERIES: These are Caspiana, Catoosa, Dardanelle, Deepwater, Mason, Mer Rouge, and Tiptonville series in the same family. Soils in similar families are Armistead, Ashwood, Benklin, Claremore, Clareson, Fitzhugh, Newtonia, Nowata, Okay, and Reelfoot series. Armistead, Benklin, and Reelfoot soils have wetness mottles within 16 inches of the surface. Ashwood soils have a fine control section. Caspiana, Deepwater, Mason Mer Rouge, Newtonia, and Tiptonville soils have a solum more than 60 inches thick. Catoosa, Claremore, and Clareson soils have a solum less than 40 inches thick. In addition, Clareson soils have a clayey-skeletal control section. Dardanelle soils do not have bedrock within 60 inches of the surface. Fitzhugh and Okay soils have a fine-loamy control section. Nowata soils have a loamy-skeletal control section.
GEOGRAPHIC SETTING: Lula soils are on nearly level to gently sloping ridgetops or summits of the uplands in the Cherokee Prairies. Slopes are 0 to 5 percent. They formed in material weathered form limestone of Pennsylvanian age. Mean annual precipitation ranges from 37 to 45 inches. Mean annual temperature ranges from 57 to 64 degrees F. Thornthwaite annual P-E indices is more than 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Catoosa, Claremore, Clareson, and Newtonia series and Scullin, Shidler, and Summit series. Catoosa, Claremore, Clareson, Newtonia, Scullin, and Shidler soils occur on similar areas of the landscape. In addition, Scullin soils have a fine control section and a solum less than 40 inches thick. Shidler soils have a solum less than 20 inches thick. Summit soils occur on side slopes usually below areas of Lula soils and a fine control section.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: Mainly used for range. The native vegetation is mainly tall grass prairie. Minor acreage is cultivated to small grains, soybeans, grain sorghum, or tame pasture.
DISTRIBUTION AND EXTENT: Cherokee Prairies of Oklahoma, Kansas, and possibly Missouri. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Crawford County, Kansas; 1969.
REMARKS: These soils were formerly included in the Newtonia series.
7/19/2002 - Cleaned up the formatting and updated the horizon nomenclature. No other changes made. PRF