LOCATION PLEVNA KSEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Fluvaquentic Endoaquolls
TYPICAL PEDON: Plevna fine sandy loam - in native grass. (Colors are for moist soil unless otherwise stated.)
A1--0 to 10 inches; black (10YR 2/1) fine sandy loam, dark gray (10YR 4/1) dry; weak medium granular structure; soft, very friable; many fine roots; mildly alkaline; clear smooth boundary.
A2--10 to 17 inches; very dark gray (10YR 3/1) fine sandy loam, dark gray (10YR 4/1) dry; moderate fine granular structure; slightly hard, very friable; many fine roots; few medium distinct strong brown (7.5YR 5/6) irregularly shaped masses of iron accumulation with diffuse boundaries in the lower five inches; moderately alkaline; gradual smooth boundary. (Combined thickness of the A horizon is 10 to 24 inches.)
Bg--17 to 40 inches; dark gray (10YR 4/1) fine sandy loam, gray (10YR 6/1) dry; massive; hard, very friable; common medium distinct strong brown (7.5YR 5/6) and brown (10YR 5/3) irregularly shaped masses of iron accumulation with diffuse boundaries throughout; many fine roots to 24 inches, few below; moderately alkaline; gradual smooth boundary. (15 to 30 inches thick)
2C--40 to 60 inches; brown (10YR 5/3) fine sand, pale brown (10YR 6/3) dry; single grained; loose; few fine faint strong brown (7.5YR 5/6) irregularly shaped masses of iron accumulation with diffuse boundaries in upper 10 inches; moderately alkaline.
TYPE LOCATION: Pratt County, Kansas; 10 miles east and 1 mile north of Pratt, Kansas; 600 feet west and 20 feet north of the southeast corner of sec. 30, T. 27 S., R. 11 W.
RANGE IN CHARACTERISTICS: The thickness of the solum ranges from 30 to 54 inches. The mollic epipedon is 10 to 24 inches thick. The soil typically contains no free carbonates; however, some pedons contain free carbonates at depths below 20 inches. This soil is neutral to moderately alkaline throughout. The control section has more than 50 percent fine or coarser sand.
The A horizon has hue of 10YR, value 2 or 3 and 3 to 5 dry, and chroma of 1 or 2. It typically is fine sandy loam or sandy loam and less commonly loamy fine sand. Most pedons have redoximorphic accumulations in the lower part of this horizon.
The B horizon has hue of 10YR or 2.5Y, value 4 to 6 and 5 to 7 dry, and chroma of 2 or less. It is fine sandy loam or sandy loam. Redoximorphic accumulations are distinct or prominent in the upper part, and typically are less distinct in the lower part.
The C horizon has hue of 10YR or 2.5Y, value of 4 to 6 and 5 to 7 dry, and chroma of 1 to 4. It is fine sand or sand. In a few pedons, it is loamy sand, fine sandy loam, or sandy loam. Redoximorphic accumulations are faint or distinct and are lacking in some pedons.
COMPETING SERIES: These are the Bunejug (NV), Cohoctah (MI), and Rosecreek (NV). These soils have fewer frost free days.
GEOGRAPHIC SETTING: Plevna soils are on flood plains in river valleys. The slope gradient is 0 to 1 percent. The soils formed in loamy alluvium in the upper part; in most pedons the alluvium is more sandy below depths of 40 inches. The mean annual temperature varies from 55 to 57 degrees F, and the mean annual precipitation varies from 21 to 33 inches. Thornthwaites Annual P-E Index ranges from 32 to 52.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dillwyn, Kanza, Pratt, Tivoli, Waldeck, and Zenda soils. The Plevna soils are on similar positions as the Dillwyn, Kanza, and Waldeck soils. Zenda soils are on low terraces. The better drained Pratt and Tivoli soils are on undulating or hilly higher topographic positions.
DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is low or very low. Permeability is moderately rapid. The groundwater table is at depths of 1 1/2 to 3 feet below the surface during much of the growing season; it rises to within a few inches of the surface during wet seasons and drops to about 4 feet during late summer and early autumn. The soil is frequently flooded.
USE AND VEGETATION: Almost all areas are in native meadow and range. Vegetation is tall prairie grasses.
DISTRIBUTION AND EXTENT: South-central Kansas. The Plevna series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Reno County, Kansas, 1964.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: the one from the surface to approximately from the surface of the soil to approximately 17 inches.
Cambic horizon: the zone from 17 to 40 inches
Aquic moisture conditions: redoximorphic features in the zone from about 10 to 17 inches.
Endo: Apparent water table from the surface to 2 feet.
Series Interpretation Record: KS0092