VARIATION" IN" THE CHEMICAL COMPOSITION OF SOILS. 3 
containing small gravel and iron concretions. It is of moderate productiveness, 
but needs applications of complete fertilizer to give the best results. The sample 
analyzed was typical. There were iron concretions in this sample having well-pol- 
ished surfaces. 
20. Orangeburg sandy loam. Subsoil of No. 19. Depth 12 to 36 inches. 
21. Greenville sandy loam. Two miles east of Fort Gaines, Ga. Depth to 10 
inches. The soil consists of a reddish-brown medium sandy loam, with a brick-red 
sticky sand to sandy loam subsoil, becoming heavier with depth. It is of sedimentary 
origin and derived from unconsolidated deposits of the Coastal Plain. This soil is 
one of the most productive soils of the upland Coastal Plain region. The sample 
analyzed was typical. There were in this sample iron concretions of about the same 
size and abundance as in the Orangeburg sandy loam. The surfaces of these concre- 
tions, however, were rough, inclosing soil grains on the surface, which indicates that 
the process of formation is still going on, or that the concretions in the Orangeburg 
sample had been polished by water action since their formation. 
22. Greenville sandy loam. Subsoil of No. 21. Depth 10 to 36 inches. 
23. Norfolk fine sandy loam. One mile north of Elza. Ga. Depth to 10 inches. 
This is a pale-yellow to gray fine sandy loam, underlain by a yellow fine sandy loam 
which grades into a light sandy clay at an average depth of 18 inches. It is derived 
from reworked material carried from the higher-lying soil provinces. This soil is of 
moderate productiveness. The sample analyzed was typical, except that the sub- 
soil was more brownish red than yellow. 
24. Norfolk fine sandy loam. Subsoil of No. 23. Depth 10 to 36 inches. 
25. Norfolk fine sandy loam. Three miles southwest of Murphy, Ga. Depth to 16 
inches. The general description given for No. 23 applies equally well to this sample. 
The soil is somewhat too brown and the subsoil more brown than yellow, otherwise 
the sample is typical. 
26. Norfolk fine sandy loam. Subsoil of Sample No. 25. Depth 10 to 36 inches. 
27. Tifton fine sandy loam. One and three-fourths miles northeast of Bellville, Ga. 
Depth to 12 inches. This type consists of a gray or yellowish -gray medium sandy 
loam, overlying an ocherous-yellow, heavier and more compact medium sandy loam. 
Both soil and subsoil contain iron concretions and the type is known as pimply land. 
The type is derived from unconsolidated Coastal Plain deposits. The Tifton soils are 
somewhat more productive than the Norfolk soils. The sample analyzed is typical, 
except for a slightly redder shade in the subsoil. 
28. Tifton fine sandy loam. Subsoil of No. 27. Depth 12 to 36 inches. 
29. Huston fine sandy loam. One mile south of Minden, La. Depth to 6 inches. 
The soil of this type is a light-gray or yellowish-gray fine sandy loam, underlain by a 
buff or reddish-yellow, somewhat mottled heavy fine sandy loam or sandy clay. 
The type is derived from unconsolidated sediments of the Eocene period modified 
by an admixture of Lafayette material. The productiveness is low. Both soil and 
subsoil are typical. 
30. Ruston fine sandy loam. Subsoil of No. 29. Depth 6 to 36 inches. 
31. Ruston fine sandy loam. One and one-fourth miles northeast of Bluffton, Ga. 
Depth to 10 inches. The description given for No. 29 applies to this sample, which, 
however, approaches the Orangeburg in color characteristics, the soil being browner 
and the subsoil redder than normal. Otherwise the sample is typical. 
32. Ruston fine sandy loam. Subsoil of No. 31. Depth 10 to 36 inches. 
33. Susquehanna fine sandy loam. Two and one-half miles north of courthouse, 
Smith County, Tex. Depth to 12 inches. The soil is a gray to brown fine sand or 
light fine sandy loam, resting on a red or yellowish clay, which is usually stiff and 
plastic and mottled in the lower depths. Iron concretions are found throughout the 
soil profile. The type has been derived principally from the underlying clays. It 
is rated as of medium productivity. The soil and subsoil are typical. 
34. Susquehanna fine sandy loam. Subsoil of No. 33. Depth 12 to 36 inches. 
