II. TALLAHASSEE RED HILLS. 269 



but this method is beheved to give results more compatible with the 

 observed productivity of soils than any other. 

 The analysis is as follows : 



Water and organic matter i-9^2 per cent 



Potash (K2O) .065 " " 



Soda (Na20) .013 " " 



Lime (CaO) .243 " " 



Magnesia (MgO) .023 " 



Phosphoric acid anhydride (P2O5) .323 " " 



Sulphuric acid anhydride (SO3) .011 " '" 



Brown oxide of manganese (Mn304) .024 " " 



Peroxide of iron (Fe203) 1.491 " " 



Alumina (AI2O3) 3.977 " 



Soluble sihca 2.640 " '" 



Insoluble matter 86.460 " 



As compared with other northern Florida soils analyzed in the 

 same report, this is the highest in iron and phosphorus, and the low- 

 est in soda, manganese, and sulphur. It is considerably above the 

 world's average in phosphorus, but, like most other Florida soils, 

 rather low in potassium. 



Two samples of soils with corresponding subsoils were col- 

 lected by the writer near Tallahassee in the summer of 1914 and 

 partially analyzed by L. Heimburger, Assistant State Chemist. The 

 methods used* are somewhat different from those used in the Tenth 

 Census, but the results seem similar enough, as far as thev go. 



The samples are as follows : 



1. Rich dense woods near top of hill on St. Augustine road about a 

 mile east of Tallahassee. Gray sandy loam with considerable humus. 

 o — 6 inches. 



2. Subsoil of same, a little more yellow in color, 6 — 12 inches. 



3. Open short-leaf pine woods on north side of railroad about 2 

 miles east of Tallahassee. Similar to No. i, but with less humus. A 

 few earthworms were encountered in digging this sample, strange to say. 

 — 6 inches. 



4. Subsoil of same. 6 — 12 inches. 



Both localities seem to be in areas mapped as '"Orangeburg fine sandy 

 loam" on the government soil map, but the second is most like the '"Orange- 

 burg" soils of other states. 



*See appendix. 



