LOCATION EGYPT LAEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Aquic Glossudalfs
TYPICAL PEDON: Egypt silt loam on a 0.5 percent slope in cultivated field. (Colors are for moist soil unless otherwise stated.
Ap--0 to 5 inches; dark brown (10YR 4/3) silt loam; weak fine granular structure; friable; few fine roots; few medium black and brown concretions; medium acid; clear wavy boundary. (3 to 6 inches thick)
E--5 to 16 inches; brown (10YR 5/3) silt loam; common medium faint yellowish brown (10YR 5/6) and grayish brown (10YR 5/2) mottles; weak fine subangular blocky structure; friable; few fine roots; common medium black concretions; strongly acid; clear wavy boundary. (5 to 15 inches thick)
B/E--16 to 25 inches; yellowish brown (10YR 5/4) silty clay loam; common medium faint grayish brown (10YR 5/2) and yellowish brown (10YR 5/6) mottles; weak coarse prismatic structure parting to moderate medium subanguar blocky; firm; few fine roots; few fine discontinuous vesicular pores; few faint films on faces of peds; common medium black concretions; common tongues of light brownish gray (10YR 6/2) silt loam (E) 0.5 to 4.0 cm wide extend between prisms and peds making up about 20 percent of horizon; strongly acid; clear irregular boundary. (5 to 20 inches thick)
Btn1--25 to 41 inches; yellowish brown (10YR 5/4) silty clay loam; firm; common medium faint yellowish brown (10YR 5/8) mottles; weak coarse prismatic structure parting to moderate medium subangular blocky; firm; few fine roots and pores; few faint clay films on faces of peds; common medium brown concretions; thin pale brown silt coatings between prisms; strongly acid; clear wavy boundary. (12 to 20 inches thick)
Btn2--41 to 52 inches; yellowish brown (10YR 5/4) silty clay loam; common medium faint pale brown (10YR 6/3) and yellowish brown (10YR 5/8) mottles; weak coarse prismatic structure parting to moderate fine subangular blocky; firm; few fine pores; few faint clay films on faces of peds; few fine and medium brown concretions; mildly alkaline; clear wavy boundary. (8 to 20 inches thick)
Btn3--52 to 70 inches; dark brown (7.5YR 4/4) silty clay loam; weak coarse prismatic structure parting to moderate medium subangular blocky; firm; few faint clay films on faces of peds; few medium black stains on faces of peds; thin grayish brown silt coatings between prisms; strongly alkaline.
TYPE LOCATION: Franklin Parish, Louisiana; 5.5 miles south of Winnsboro; 700 feet east of parish Highway; 35 feet north of field road; SW1/4NE1/4 sec. 34, T. 13 N., R. 7 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 100 inches. Exchangeable sodium ranges form 15 to 35 percent within 17 to 40 inches of the upper boundary of the B horizon. Tongues of the E horizon extend in to the B horizon. Reaction, except for those surface layers that have been limed, ranges from slightly acid to very strongly acid in the A horizon and upper B horizon and from neutral to strongly alkaline in the lower B horizon. The effective cation exchange capacity typically ranges from 15 to 50 percent, saturated with exchangeable aluminum within 30 inches of the soil surface.
The Ap or A horizon has hue of 10YR, value 4 to 6, and chroma of 2 or 3.
The E horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 1 to 3. Mottles in shades of brown, yellow, and gray range from few to many. Fine and medium black, brown, or red concretions range from none to common. Tongues of E material extend between prisms in the upper part of the B horizon (B/E horizon).
The B horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 to 6, and chroma of 3 to 6. Mottles in shades of brown, yellow, or gray range from none to many throughout the B horizon. Mottles with chroma of 1 or 2 range from few to many in the upper 10 inches. Texture in the upper part of the B horizon is silt loam, or silty clay loam with 3 to 15 percent sand. The lower part is loam, silt loam, silty clay loam, or clay loam. Fine or medium black, brown, or red concretions range from few to common throughout.
COMPETING SERIES: These are the Fred and Tillou series in the same family and the Alazan, Bude, Calloway, Deerford, Metcalf, Poolville, Tippo, and Verdun series in similar families. Fred soils have alkaline B horizons. Tillou soils have a Bt horizon above the B/E horizon. Alazan soils have fine-loamy control sections and siliceous mineralogy. Bude and Calloway soils have fragipans. Deerford and Verdun soils have natric horizons. Metcalf soils have clayey IIB horizons. Poolville soils have siliceous mineralogy. Tippo soils have coarse-silty control sections.
GEOGRAPHIC SETTING: Egypt soils are on level to gently undulating stream terraces of late Pleistocene age. The soil formed in mixed loess and loamy late Pleistocene age stream terrace sediments. Slope gradients are typicaly less than 1 percent, but range up to 5 percent. The climate is warm and humid. The average annual precipitation ranges from about 45 to 55 inches. The mean annual air temperature ranges from about 60 to 70 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the competing Calloway and Deerford series and the Dexter, Foley, Gigger, Gilbert and Necessity series. Dexter, Gigger and Necessity soils are on higher lying areas and have browner colors. Gigger soils also have fragipans. Gilbert soils are poorly drained and have 1 or 2 chroma B horizons. Foley soils are in the lower depressions and have natric horizons.
DRAINAGE AND PERMEABILITY: Egypt soils are somewhat poorly drained. Runoff is slow and permeability is slow. A perched water table is at depths of 0.5 to 2.0 feet during late winter and early spring.
USE AND VEGETATION: Most areas are used for cropland or pastureland. The main crops are cotton, soybeans, small grains, and truck crops. Wooded areas are in oaks, elm, pine, sweetgum, and honey locust.
DISTRIBUTION AND EXTENT: Louisiana, and possibly Arkansas. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Franklin Parish, Louisiana; 1979.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon.......................0 to 16 inches (Ap,E) Argillic horizon..........16 to 70 inches (B/E,Bt1,Bt2,Bt3) Glossic features......................16 to 25 inches (B/E) Aquic moisture regime
ADDITIONAL DATA: Louisiana Agricultural Experiment Station Lab Sample No. S80LA-41-6; included in the Franklin Parish, Louisiana, Publushed Soil Survey Report, page 116.