LOCATION IDEE LAEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Typic Endoaqualfs
TYPICAL PEDON: Idee silt loam, on a low level ridge; less than 1 percent slope in soybeans.(Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; dark grayish brown (10YR 4/2) loam; weak medium subangular blocky parting to weak medium fine granular structure; friable; common fine roots; very strongly acid; abrupt smooth boundary. (2 to 8 inches thick)
Bt1--6 to 16 inches; grayish brown (10YR 5/2) silt loam; many medium and coarse distinct yellowish brown (10YR 5/4) masses of iron accumulation; weak coarse subangular blocky structure; friable; few fine roots; thin patchy clay films on faces of peds; very strongly acid; gradual wavy boundary. (6 to 15 inches thick)
Bt2--16 to 34 inches; grayish brown (10YR 5/2) silty clay loam; many coarse distinct brown (7.5YR 4/4) masses of iron accumulation; weak medium subangular blocky structure; plastic; few fine roots; thin discontinuous clay films on faces of peds; few dark gray (10YR 4/1) clay flows in channels; few black accumulations; strongly acid; clear wavy boundary. (10 to 30 inches thick)
Bt3--34 to 44 inches; grayish brown (10YR 5/2) silty clay loam; many coarse distinct dark yellowish brown (10YR 4/4) masses of iron accumulation; weak coarse subangular blocky structure; firm; few fine roots; distinct discontinuous clay films on faces of peds; few dark gray (10YR 4/1) clay flows in channels; common medium and coarse black accumulations that are firm and brittle; few white barite crystals; moderately acid; clear wavy boundary. (6 to 20 inches thick)
2Btb1--44 to 56 inches; yellowish brown (10YR 5/6) silt loam; many medium distinct grayish brown (10YR 5/2) iron depletions; weak coarse prismatic parting to weak medium subangular blocky structure; firm, slightly brittle; few fine roots; few fine pores; distinct discontinuous clay films on faces of peds; many black stains; moderately acid; gradual wavy boundary. (6 to 25 inches thick)
2Btb2--56 to 70 inches; brown (7.5YR 4/4) loam; streaks and pockets of brown (7.5YR 5/2); weak very coarse subangular blocky structure; firm and brittle; few fine pores; thin patchy clay films on faces of peds; few black stains; slightly acid; gradual wavy boundary.
TYPE LOCATION: Morehouse Parish, Louisiana, about 9.5 miles southeast of Mer Rouge, 180 feet east of center of gravel road, 12 feet north of fence in the NW1/4NW1/4, sec. 15, T. 20 N., R. 8 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 100 inches or more. The A and B horizons range from slightly acid to very strongly acid, except for surface horizons that have been limed. The 2Bt horizon ranges from slightly acid to very strongly acid.
The A horizon has hue of 10YR, value of 4 or 5, and chroma of 2 or 3. Iron depletions are in shades of gray, and iron accumulations are in shades of yellow, or brown. Texture is silt loam or silty clay loam.
The Bt horizon has hue of 10YR, value of 4 or 5, and chroma of 2. Iron depletions are in shades of gray, and iron accumulations are in shades of yellow, and brown. Texture is silty clay loam or silt loam.
The 2Bt horizon has hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 2 to 6. Iron depletions are in shades of gray, and iron accumulations are in shades of yellow, or brown. Texture is very fine sandy loam, loam, sandy clay loam, silt loam, or silty clay loam.
COMPETING SERIES: These are the Acy, Dundee, Essen, Galvez, Hebert, McGehee, and Patoutville series of the same family. Acy soils have black or very dark gray coatings on faces of peds in the upper Bt horizon. Dundee soils have thinner solum and lack IIB2t horizons. Essen, Galvez, and Patoutville soils have neutral or alkaline lower B horizons. Hebert and McGehee soils have B2t horizons with hue of 5YR. Hebert soils also have silt coats on faces of peds and McGehee soils have silty clay B3 and C horizons.
GEOGRAPHIC SETTING: Idee soils are on nearly level to nearly level low terraces that were natural levees of distributaries of the Mississippi River. Slopes range from 0 to 5 percent. This soil formed in loamy alluvial sediments or mixed alluvial and loess deposits over loamy alluvial sediments. Near the type location the mean annual precipitation is about 51 inches and the mean annual temperature is about 66 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Hebert series and the Dexter, Goodwill, Forestdale, Perry, and Portland series. Dexter soils are at higher elevations, are better drained and have higher chroma Bt horizons. Goodwill soils are at slightly higher elevations and have Bt horizons that are dominantly 3 to 6 chroma. Forestdale, Perry, and Portland soils are at lower elevations and have clayey control sections.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow runoff; moderately slow permeability.
USE AND VEGETATION: Most areas are cleared and used for soybeans and cotton. Woodland is mixed hardwoods.
DISTRIBUTION AND EXTENT: Louisiana and possibly Arkansas. This series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Morehouse Parish, Louisiana; 1981.
REMARKS: Series was reclassified to a Typic Endoaqualf from an Aeric Ochraqualf in 5/2001. Colors in the upper 30 inches of the type location pedon and in the series range in characteristics do not support an Aeric subgroup classification. Series also was assigned to an active activity class based on lab data for the type location pedon.