LOCATION RAZORT AR+MO OKEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Mollic Hapludalfs
TYPICAL PEDON: Razort silt loam, on 0 to 1 percent slopes in pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; dark yellowish brown (10YR 3/4) silt loam; moderate medium granular structure; very friable; many medium roots; neutral; gradual smooth boundary. (0 to 9 inches thick)
AB--8 to 19 inches; dark brown (10YR 3/3) silt loam; weak coarse subangular blocky structure; friable; many fine pores; many wormcasts; common fine roots; slightly acid; gradual smooth boundary. (8 to 12 inches thick)
B21t--19 to 24 inches; brown (10YR 4/3) silt loam; weak medium subangular blocky structure; friable; many fine and medium pores; many wormcasts; common fine roots; common thin patchy clay films on faces of peds and in pores; moderately acid; gradual smooth boundary. (4 to 7 inches thick)
B22t--24 to 33 inches; dark brown (10YR 3/3) silt loam; faint dark yellowish brown mottles; weak medium subangular blocky structure; friable; common fine and medium pores; common thin patchy clay films on faces of peds; few fine roots; moderately acid; gradual wavy boundary. (8 to 10 inches thick)
B23t--33 to 54 inches; brown (10YR 4/3) silt loam; weak medium subangular blocky structure; friable; common fine and medium pores; few thin patchy clay films on faces of peds and in pores; few fine roots; moderately acid; gradual wavy boundary. (18 to 22 inches thick)
2C--54 to 60 inches; mottled strong brown (7.5YR 5/6), brown (10YR 5/3), and gray (10YR 5/1), very gravelly silt loam; massive; friable; 55 percent gravel less than 2 inches in diameter; few fine roots; moderately acid.
TYPE LOCATION: Washington County, Arkansas; SE1/4NE1/4SE1/4 sec. 33, T. 17 N., R. 31 W. Type location is on north side of Hamestring Creek.
RANGE IN CHARACTERISTICS: The solum thickness ranges from 38 to more than 80 inches. The particle-size control section averages 18 to 30 percent clay. The mean annual soil temperature is 54 to 59 degrees F.
The A horizon has hue of 10YR, value of 3, and chroma of 2 to 6, or value of 2, and chroma of 2. Texture is silt loam, loam, fine sandy loam, or gravelly silt loam. Reaction is moderately acid to neutral.
The AB horizon has hue of 7.5YR or 10YR, value of 3 to 6, and chroma of 3 to 6. Texture is silt loam, loam, or clay loam. Reaction is moderately acid to neutral.
The Bt horizon has hue of 10YR, value of 3 to 5, and chroma of 3 or 4, or hue of 7.5YR, value of 4 or 5, and chroma of 4 to 6. Some pedons are mottled with chromas of 1 or 2 below 36 inches. Texture is silt loam, loam, sandy clay loam, or clay loam. Reaction is moderately acid to neutral.
The 2Bt horizon, where present, has similar colors as the Bt horizon, but has gravelly textures.
The BC horizon, where present, has similar colors as the Bt horizon. Texture is silt loam or loam. Reaction is slightly acid or neutral.
The underlying 2C horizon is variable in texture. Colors are similar as the Bt horizon. Reaction is slightly acid or neutral.
COMPETING SERIES: These are the Baltimore, Bassett, Blooming, Caleb, Dowagiac, Dunbridge, Lauramie, Longlois, Lydick, Mohawk, Neda, Newcomer, Oneco, Orwood, Racine, Taopi, Waucoma, and Winneshiek series. Baltimore soils have Bt horizons with redder hue. Bassett, Blooming, and Racine soils formed in two materials that are typically separated by a stone line. Caleb soils have a mean annual soil temperature of 50 to 54 degrees F., and formed in pre-Sangamon sediments of variable texture. Dunbridge, Newcomer, and Winneshiek soils have a lithic or paralithic contact from 20 to 40 inches. Dowagiac, Lauramie, Longlois, and Taopi soils have free carbonates in the lower part of the series control section. Lydick soils are more acid, contain shale fragments and more sand in the C horizons. Mohawk soils have a higher content of silt and have free carbonates from 20 to 60 inches. Neda soils are underlain by stratified coarser textured material. Orwood soils are underlain by sandstone. Oneco and Waucoma soils have a lithic contact from 40 to 60 inches.
GEOGRAPHIC SETTING: Razort soils are on nearly level and gently sloping low terraces and floodplains in the Ozark Highlands (MLRA 116A). Slopes range from 0 to 3 percent. The soil formed in silty alluvium overlying nonconforming residuum, or bedrock of varying character.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Britwater, Elsah, Healing, and Wideman series. Britwater soils lack a mollic colored surface layer, have a redder subsoil and are on adjacent higher terraces. Elsah soils are loamy-skeletal and are on similar landscapes. Healing soils are fine-silty and are on similar landscapes. Wideman soils have a sandy control section and are on similar landscapes.
DRAINAGE AND PERMEABILITY: Well drained; negligible to low runoff; moderate permeability. The saturated hydraulic conductivity is moderately high. These soils may be flooded for brief periods.
USE AND VEGETATION: Native vegetation was mixed hardwoods, including oak, maple, elm, sycamore, and hickory species. Areas large enough for extensive use are in pasture, with some cultivated crops.
DISTRIBUTION AND EXTENT: The Ozark region (MLRAs 116A and 116B) of Arkansas, Oklahoma, and Missouri. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Washington County, Arkansas; 1970
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface of the soil to a depth of 19 inches (Ap and AB horizons)
Mollic intergrade feature - mollic colors in the Ap horizon and a base saturation of less than 50 percent in the AB horizon.
Argillic horizon - the zone from 19 to 54 inches (Bt1, Bt2, and Bt3 horizons)