LOCATION MCCUNE KS+MO
Established Series
Rev. ACP, PRF
09/2012
MCCUNE SERIES
The McCune series consists of very deep, somewhat poorly drained soils that formed in silty alluvium of the Cherokee Prairies (MLRA 112). These soils are on low terraces and floodplains and have slope ranging from 0 to 2 percent. The mean annual precipitation is about 38 inches and the mean annual temperature is about 57 degrees F.
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Aeric Glossaqualfs
TYPICAL PEDON: McCune silt loam - cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; weak fine granular structure; slightly hard, friable; few small gray concretions; moderately acid; clear smooth boundary. (5 to 10 inches thick)
E1--7 to 16 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; few fine faint redoximorphic concentrations of dark yellowish brown (10YR 4/4); weak fine granular structure; slightly hard, friable; few small gray concretions; strongly acid; gradual smooth boundary. (3 to 12 inches thick)
E2--16 to 25 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; common medium distinct redoximorphic concentrations of dark yellowish brown (10YR 4/4); weak medium subangular blocky structure that crushes easily to fine and medium granular structure; slightly hard, friable; common very fine pores; common fine gray concretions with yellowish brown (10YR 5/6) interiors; few small black concretions; strongly acid; gradual smooth boundary. (5 to 15 inches thick)
E/B--25 to 30 inches; light brownish gray (10YR 6/2) silt loam, (E), light gray (10YR 7/2) dry; common medium distinct redoximorphic concentrations of brown (10YR 4/3) (Bt) that feel slightly more clayey than soil matrix; weak medium subangular blocky structure, hard, friable; few thin darker colored films on some ped surfaces; strongly acid; gradual smooth boundary. (2 to 8 inches thick)
Bt--30 to 46 inches; coarsely mottled grayish brown (10YR 5/2), dark gray (10YR 4/1), and yellowish brown (10YR 5/6) silty clay loam, light brownish gray (10YR 6/2), dark gray (10YR 4/1) and yellowish brown (10YR 5/6) dry; weak medium blocky structure; hard, firm; light brownish gray (10YR 6/2) uncoated mineral grains on peds; thin patchy clay films; strongly acid; gradual smooth boundary. (8 to 20 inches thick)
BC--46 to 65 inches; coarsely mottled grayish brown (10YR 5/2), gray (10YR 5/1) and yellowish brown (10YR 5/6) silty clay loam, light brownish gray (10YR 6/2), gray (10YR 5/1) and yellowish brown (10YR 5/6) dry; weak coarse subangular blocky structure; hard, firm; strongly acid; diffuse boundary. (10 to 30 inches thick)
C--65 to 84 inches; coarsely mottled gray (10YR 5/1), dark yellowish brown (10YR 4/4) and strong brown (7.5YR 5/6) silty clay loam, dry colors same; massive; hard, firm; common black stains; strongly acid.
TYPE LOCATION: Crawford County, Kansas; about 3 miles east and 1 mile north of intersection of Fourth and Broadway in Pittsburg; 700 feet east and 200 feet north of the southwest corner of sec. 14, T. 30 S., R 25 E.
RANGE IN CHARACTERISTICS:
Soil moisture control section: aquic.
Depth to albic horizon: 5 to 10 inches
Depth to argillic horizon: 13 to 37 inches
Depth to glossic horizon: 13 to 37 inches
Depth to redox concentrations: 5 to 10 inches
Depth to endosaturation: 12 to 36 inches from December to April
Particle-size control section (weighted average):
Clay content: 25 to 35 percent
Sand content: 12 to 33 percent
Ap horizon:
Hue: 10YR or 2.5Y
Value: 4 or 5, 6 or 7 dry
Chroma: 2 or 3
Texture: silt loam
Clay content: 13 to 24 percent
Base saturation: 38 to 69 percent
Reaction: slightly acid to strongly acid
A horizon (where present):
Hue: 10YR or 2.5Y
Value: 3 or 4, 5 or 6 dry
Chroma: 1 or 2
Texture: silt loam
Reaction: slightly acid to strongly acid
Note: A horizons having moist value darker than 3.5 are less than 6 inches thick.
E horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6, 5 to 8 dry
Chroma: 1 to 3
Redoximorphic features: Color is due to uncoated mineral grains
Texture: silt loam
Clay content: 8 to 24 percent
Base saturation: 17 to 42 percent
Reaction: moderately acid to very strongly acid
Bt horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6, 5 to 7 dry
Chroma: 1 or 2
Redoximorphic features: mottled redox depletions and redox
concentrations
Texture: silt loam or silty clay loam
Clay content: 23 to 35 percent
Reaction: moderately acid to very strongly acid
C horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6, 5 to 7 dry
Chroma: 1 or 2
Texture: silt loam or silty clay loam
Reaction: moderately acid to very strongly acid
Matrix of the Bt and C horizon has 10YR or 2.5Y hue, value of 4 to 6 and 5 to 7 dry, and chroma of 2 or less. These horizons are coarsely mottled with colors of higher chroma and some with redder hue. In many places mottles are so coarse and abundant that selection of a dominant color is not feasible. The difference in clay content between the E and Bt horizon is less than 15 percent Texture and reaction of the C horizon is like that of the B horizon except that some pedons are stratified with thin layers or lenses or more sandy or more clayey texture.
COMPETING SERIES: This is the
Bursley series.
Bursley: has a cambic horizon above the 2B/E horizon.
GEOGRAPHIC SETTING:
Parent material: silty alluvium
Landscape: plains
Landform: low terraces and floodplains
Slopes: 0 to 2 percent
Mean annual temperature: 57 to 63 degrees F
Mean annual precipitation: 35 to 45 inches
Annual Thornthwaite P-E Index: 64 to 80
GEOGRAPHICALLY ASSOCIATED SOILS: These include to the competing
Hepler soils.
Cherokee soils on uplands, fine family
Dennis soils on uplands, fine, and darker colored
Lula soils on uplands and redder
Medoc soils on uplands, fine family
Opolis soils on uplands, fine family
Osage soils fine family
Parsons soils on uplands, fine family
Radley soils darker colored,
Verdigris soils darker colored
DRAINAGE AND PERMEABILITY:
Drainage: somewhat poorly
Runoff: low
Permeability: slow
Flooding: rarely to occasionally flooded
Saturation: with water during some part of the growing season during most years.
USE AND VEGETATION: Mostly cultivated. Major crops are corn, wheat, and soybeans. Native vegetation is hardwood forest dominated by elm, oak, and ash with a moderate to thin understory of tall grasses.
DISTRIBUTION AND EXTENT: Southeastern Kansas, southwestern Missouri and possibly adjacent parts of Arkansas and Oklahoma. The series is estimated to be of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Crawford County, Kansas, 1969.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 30 to 46 inches (Bt horizon)
Ochric epipedon: The zone from 0 to 8 inches (Ap horizon)
Glossic horizon: The zone from 25 to 30 inches (E/B horizon)
Argillic horizon: The zone from 30 to 40 inches (Bt horizon).
Endosaturation: The zone of saturation at 12 to 72 inches. (E1, E2, E/B, Bt, BC, and C horizons)
National Cooperative Soil Survey
U.S.A.