![]() ![]() Soil Moisture: An udic soil moisture regime. Landscape: river valleys on flat coastal plains Parent material: red alluvium presumed to be derived originally from Permian age redbeds and associated sediments. Kolin soils: siliceous mineralogy, and have a yellowish matrix. Gore soils: do not have a clay decrease of 20 percent or more from the maximum clay content within 152 cm (60 in) of the soil surface. Woodtell soils: 102 to 152 cm (40 to 60 in) to stratified or thinly bedded loamy and clayey sediments of Tertiary age. Telogia soils: underlain with limestone that ranges from 102 to 152 cm (40 to 60) from the surface Oula soils: 102 to 152 cm (40 to 60 in) toĬatahoula Formation of Tertiary age tuffaceous siltstones or claystones. Kellison soils: 102 to 152 cm (40 to 60 in) to Tertiary age claystone. Rayburn soils: 102 to 152 cm (40 to 60 in) to a paralithic contact.Ĭolbert soils: 102 to 152 cm (40 to 60 in) to a lithic contact with limestone bedrock. ![]() In the lower part reaction ranges from neutral to moderately alkaline. Reaction: upper part ranges from slightly acid to slightly alkaline. Identifiable secondary carbonate: amount-none to common, kind-concretions Texture: very fine sandy loam, silt loam, silty clay loam, clay, or silty clay or stratified with these textures Hue: 10YR (Some pedons have a variegated matrix in shades of red, brown, or gray) Identifiable secondary carbonate: amount-none to few, kind-concretions Texture: silty clay loam, clay, or silty clay Variegated matrix in shades of red, brown, or gray Redox depletions: amount-none to many, shades- gray Redox concentrations: amount-none to many, shades- red or brown Reaction: very strongly acid to moderately acid. Texture: very fine sandy loam or silt loam Value: 3 to 5 (where value is 3, the thickness is less than 15 cm (6 in) Slickensides or wedge shaped peds are within 125 cm (49.2 in) of the soil surface. Linear extensibility is 6 cm or more between the soil surface and a depth of 100 cm (39.4 in). ![]() Particle-size control section (weighted average) Solum thickness: 102 to 152 cm (40 to 60 in). Latitude 30 degrees, 22 minutes, 2 seconds N Longitude 92 degrees, 32 minutes, 2 seconds W WGS 84). (Evangeline USGS quad 1550 feet north and 2800 feet west of the southeast corner of section 12, T. TYPE LOCATION: Acadia Parish, Louisiana about 3 miles north-northeast of Iota to end of Parish Road 436 0.9 mile northwest on woodland road 300 feet south of drain and 200 feet northeast in woodland. (0 to 61 cm thick)Ĭ1-109 to 152 cm (43 to 60 in) pale brown (10YR 6/3) silty clay loam massive firm many fine and medium round iron-manganese concretions slightly acid gradual wavy boundary.Ĭ2-152 to 203 cm (60 to 80 in) pale brown (10YR 6/3) silt loam massive friable neutral. (Combined thickness of the Bt horizons range from 41 to 119 cm )īC-71 to 109 cm (28 to 43 in) variegated matrix of reddish brown (5YR 5/4) and yellowish red (5YR 5/8) silty clay loam moderate medium subangular blocky structure hard, firm few medium distinct yellowish red (5YR 4/6) masses in matrix stratified pockets of pale brown (10YR 6/3) silt loam very strongly acid gradual wavy boundary. (0 to 13 cm thick)īt-18 to 41 cm (7 to 16 in) red (2.5YR 4/8) silty clay moderate medium subangular blocky structure slightly hard, firm common fine and medium roots common very fine and fine tubular pores few distinct clay films on surface of peds and in pores very strongly acid clear wavy boundary.ītss-41 to 71 cm (16 to 28 in) yellowish red (5YR 4/6) silty clay moderate medium subangular blocky structure hard, firm few fine and medium roots common very fine and fine tubular pores common distinct slickensides with wedge shaped aggregates common distinct clay films on surface of peds and in pores common coarse prominent strong brown (7.5YR 5/6) masses of iron accumulation and common medium prominent pale brown (10YR 6/3) iron depletions in matrix very strongly acid gradual wavy boundary. (8 to 15 cm thick)Į-8 to 18 cm (3 to 7 in) pale brown (10YR 6/3) silt loam weak medium platy structure parting to weak fine granular slightly hard, friable many fine and medium roots very strongly acid abrupt smooth boundary. (Colors are for moist soil unless otherwise stated.)Ī-0 to 8 cm (0 to 3 in) brown (10YR 4/3) silt loam weak fine granular structure slightly hard, friable many fine and medium roots strongly acid abrupt smooth boundary. TAXONOMIC CLASS: Fine, smectitic, thermic Vertic Hapludalfs Mean annual air temperature is about 19.5 degrees C (67 degrees F), and mean annual precipitation is about 1549 mm (61in). These gently sloping to moderately sloping soils are on terraces. These soils formed in loamy and clayey sediments of Pleistocene age. The Iota series consists of very deep, well drained soils. Official Series Description - IOTA Series ![]()
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