U. S. DEPARTMENT OF AGRICULTURE. 
35. Susquehanna fine sandy loam. Eight miles northeast of Shubuta, Miss. Depth 
to 10 inches. The description of No. 33 applies to this sample. Both soil and sub- 
soil are typical. 
36. Susquehanna fine sandy loam. Subsoil of Xo. 35. Depth 10 to 36 inches. 
37. Susquehanna fine sandy loam. Four miles south of Hartsfield, Ga. Depth 
to 12 inches. The description of Xo. 33 also applies to this sample. The subsoil 
does not seem to be as highly plastic as the average of the type; otherwise the sample 
is typical. 
38. Susquehanna fine sandy loam. Subsoil of Xo. 37. Depth 12 to 36 inches. 
39. Portsmouth fine sandy loam. Two miles south of Murphy-, Ga. Depth to 12 
inches. This is a black to rusty-brown, mucky, fine sandy loam, compact and heavy 
when wet. Large quantities of organic matter in all stages of decomposition are 
present. The type is formed from the worked-over material of the higher-lying 
provinces. When drainage conditions are favorable, the fertility is fair." The soil 
and subsoil are typical. 
40. Portsmouth fine sandy loam. Subsoil of Xo. 39. Depth 12 to 36 inches. 
41. Susquehanna clay. Three miles east of Shubuta, Miss. Depth to 4 inches. 
The soil of this type is a clay loam, sometimes containing gravel, and the subsoil a 
stiff, tenacious, red and mottled clay. It is formed from unconsolidated deposits of 
the Coastal Plain. The soil is very refractory and hard to cultivate and at present 
has very little agricultural value. The sample, both soil and subsoil, are typical. 
42. Susquehanna clay. Subsoil of Xo. 41. Depth 4 to 36 inches. 
43. Coxville fine sandy loam. Florence, S. C. Depth to 8 inches. The soil of 
this type consists of a gray to dark-gray moderately heavy fine sandy loam overlying 
a stiff, rather plastic clay, which ranges in color from yellow in the upper part to 
mottled yellow, drab, and bright red in the lower section. Small iron concretions 
and quartz gravel are sometimes encountered in both soil and subsoil. In productivity 
it is only fair. This soil is derived from unconsolidated deposits of the Coastal 
Plain province. 
44. Coxville fine sandy loam. Subsoil of Xo. 43. Depth 8 to 16 inches. 
45. Coxville fine sandy loam. Lower subsoil of No. 43. Depth 16 to 36 inches. 
PREPARATION OF SAMPLES AND METHODS OF ANALYSIS. 
The preparation of the samples for analysis was essentially that 
described in the previous report x and the methods of analysis were 
those used in the analysis of silicate rocks followed in the previous 
work, and described in detail by Hildebrand. 2 
In carrying on this work the authors gave considerable attention 
to the limits of error in the more important determinations involved 
in soil analysis, and lest too much significance be attached to small 
differences they feel warranted in making the following statement. 
When working on the same sample of a soil of average composition 
the determinations of two analysts who have had experience with 
the methods used should not differ more than 0.50 per cent in the 
case of SiO ? , 0.05 in the case of Ti0 2 , 0.20 A1 2 3 , 0.15 Fe 2 3 , 0.003 
MnO, 0.10 CaO, 0.15 MgO, 0.05 K 2 0, 0.05 Na 2 0, and 0.04 P 2 5 , 
these figures being percentage of soil, not percentage variation. 
Duplicates by the same analyst should of course agree more closely. 
Variations in the solubility of glassware were found to be a most fre- 
quent source of disagreement in CaO and MgO determination. 
IV. S. Dept. Agr. Bui. No. 122 (1914). -'U. S. Geol. Survey Bui. 422 (1910). 
