LOCATION BOLIVAR MO+KS OKEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Ultic Hapludalfs
TYPICAL PEDON: Bolivar fine sandy loam - on a 3 percent convex east-facing slope in pasture at an elevation of 1,000 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; brown (10YR 4/3) fine sandy loam; pale brown (10YR 6/3) dry; weak very fine granular structure; very friable; many fine roots; many worm casts; strongly acid; abrupt smooth boundary. (4 to 9 inches thick)
E--8 to 10 inches; brown (10YR 5/3) fine sandy loam; weak very fine granular structure; very friable; many fine roots; many worm casts; moderately acid; clear wavy boundary. (2 to 7 inches thick)
BE--10 to 13 inches; strong brown (7.5YR 5/6) loam; weak very fine and fine subangular blocky structure; friable; common fine roots; common worm casts; moderately acid; clear smooth boundary. (0 to 5 inches thick)
Bt1--13 to 18 inches; yellowish red (5YR 4/6) clay loam; strong fine subangular blocky structure; firm; common fine roots; many distinct clay films on faces of peds; few large worm channels; few worm casts; strongly acid; clear wavy boundary.
Bt2--18 to 23 inches; yellowish red (5YR 4/6) clay loam; few fine distinct light olive brown (2.5Y 5/4) and dark red (2.5YR 3/6) mottles; moderate very fine and fine subangular blocky structure; firm; few fine roots; many distinct clay films on faces of peds; few worm channels; few fine weathered sandstone fragments; very strongly acid; clear smooth boundary.
Bt3--23 to 28 inches; mottled yellowish red (5YR 4/6), strong brown (7.5YR 5/8) and yellowish brown (10YR 5/8) channery sandy clay loam; weak fine subangular blocky structure; friable; common distinct gray and olive clay films on faces of peds and at the partings and cracks of soft weathered sandstone fragments; 20 percent soft sandstone channers; very strongly acid; clear smooth boundary. (Combined thickness of the Bt horizon is 10 to 27 inches.)
Cr--28 to 44 inches; brown soft sandstone in 1 to 3 inch lenses thinly interbedded with dark gray and light gray lenses of clay shale; a few clay flows at the partings of the sandstone and shale; very strongly acid; clear smooth boundary. (10 to 20 inches thick)
R--44 inches; red massive sandstone.
TYPE LOCATION: Barton County, Missouri; about 4 miles east of Milford; 310 feet east and 2510 feet south of the northwest corner, sec. 26, T. 33 N., R. 29 W.; USGS Jerico Springs quadrangle.
RANGE IN CHARACTERISTICS: The thickness of the solum is 20 to 40 inches and generally corresponds to the depth to weathered soft sandstone. Depth to hard bedrock is 38 inches or more.
The Ap horizon has hue of 7.5YR or 10YR, value of 3 or 4, and chroma of 2 or 3. Some pedons have an A horizon 1 to 5 inches thick. The E horizon has hue of 7.5YR or 10YR, value of 4 to 6, and chroma of 3 or 4. It is fine sandy loam or loam. Reaction is strongly acid or moderately acid unless limed. Some pedons have a stony surface layer.
The BE and Bt horizons have hue of 2.5YR to 10YR, value of 4 or 5, and chroma of 4 to 8 with some part redder than 10YR. It is loam, sandy clay loam, sandy loam, clay loam or their channery, flaggy or very flaggy analogues in the lower part. The Bt averages from 25 to 35 percent clay. Reaction ranges from slightly acid to very strongly acid.
COMPETING SERIES: These are the Deanburg, Liddieville, Pamunkey, Sandhill, Stiversville, and Toine series. Deanburg, Liddieville, Sandhill, and Toine soils have thicker sola and do not have weathered sandstone within a depth of 40 inches. Pamunkey soils formed in stratified fluvial sediments derived principally from weathered felsic and mixed basis rocks and are greater than 40 inches to weathered bedrock. Stiversville soils formed in residuum from phosphatic sandy limestone and are deeper than 40 inches to weathered bedrock.
GEOGRAPHIC SETTING: Bolivar soils are on undulating to gently rolling upland that has somewhat broken topography. Slope gradients are dominantly less than 9 percent but range from 1 to 50 percent. The soils formed in residuum from acid sandstone with thin beds of clayey and sandy shales. Mean annual temperature ranges from 59 to 63 degrees F, and mean annual precipitation ranges from 35 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Barco, Barden, Bates, Collinsville, and Hector soils. Barco soils are in a mollic subgroup and are on similar landscapes. Barden soils are higher in the landscape and are in the fine particle size family. Bates soils are on similar landscapes and have a mollic epipedon. Collinsville soils are on steeper side slopes and have bedrock within a depth of 20 inches. Hector soils are lower in the landscape and have bedrock within a depth of 20 inches.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoff is medium to high.
USE AND VEGETATION: Most of these soils are used for pasture or hay. A smaller acreage is cropped to wheat, milo, soybeans, and corn with the remaining areas in timber. Native vegetation was deciduous hardwoods.
DISTRIBUTION AND EXTENT: Southwest Missouri and southeast Kansas (MLRA 116B). The series is extensive.
MLRA OFFICE RESPONSIBLE: Little Rock, Arkansas
SERIES ESTABLISHED: Lawrence County, Missouri, 1923.
REMARKS: Diagnostic horizons and features recognized in this series are: ochric epipedon - the zone from the surface of the soil to a depth of 13 inches (Ap, E, and BE horizons);
argillic horizon - the zone from approximately 13 to 28 inches (Bt1, Bt2, and Bt3 horizons);
paralithic contact - 28 inches; lithic contact - 44 inches;