268 FLORIDA GEOLOGICAL SURVEY SIXTH ANNUAL REPORT. 



covers about one-third of the whole region, and most of it is or has been 

 under cultivation. 



2. Subsoiil of same. 



3. "Norfolk fine sandy loam." Typically this is said to be a grayish 

 or light-brown fine sandy loam about 8 inches deep, underlaid by a few 

 inches of yellow sandy loam and then yellow sandy clay or clay loam. 

 It is almost as extensive as the "Orangeburg fine sandy loam," from which 

 it seems to differ chiefly in being paler and therefore presumably contain- 

 ing less iron. Much if not most of it is under 'cultivation. 



4. Subsoil of same. 



5. "Gadsden sandy loam." This is a "brown sandy loam from 8 to 14 

 inches deep, underlain by grayish-yellow or yellow sand or light sandy 

 loam to a depth of 3 feet or more." "The surface soil is very similar to 

 some of the Norfolk fine sandy loam, but the subsoil is dissimilar in 

 that the underlying sandy clay of that type is entirely wanting or is found 

 only in spots at a depth of nearly 3 feet below the surface." This is said 

 to cover 5,952 acres in Leon County, and is mostly under cultivation. 



6. Subsoil of same. , 



Mechanical Analyses of Soils and Subsoils of Tallahassee Red Hills. 



I 2 3~ 4 5 6 



Fine gravel (2-1 mm.) 0.4 0.3 0.3 0.2 0.9 0.7 



Coarse sand (1-.5 mm.) 8.9 4.3 5.0 3.1 13. i 12.1 



Medium sand (.5-. 25 mm.) 12.3 7.6 10.5 5.8 14.1 15. i 



Fine sand (.25-.1 mm.) 42.5 33.1 52.6 38.6 40.9 42.1 



Very fine sand (.1-.05 mm.) 17.3 13.2 14.3 15.3 11.4 10.7 



Silt (.05-.005 mm.) 5.5 5.7 7.4 4-6 5,6 4-8 



Clay (.005-0 mm.) 12.6 35.4 9.8 32.2 13.8 14.3 



Total 99.5 99.6 99-9 99-8 99-8 99-8 



In addition to these there is considerable "Norfolk sand" in this 

 region, but as it occurs also in other parts of Leon County, and the locali- 

 ties are not specified, it would not be safe to quote the analyses in the 

 soil survey report as pertaining to the Tallahassee red hills. 



We are fortunate in having a few chemical analyses of soils 

 from; this region. The first is from the 6th volume of the Tenth 

 Census, p. 198. It represents 9 inches of brown loam upland soil 

 from 6 miles northeast of Tallahassee, where the vegetation was 

 post, red and Spanish oaks, short-leaf pine, hickory and sweet 

 gum," collected in 1880 by Dr. Eugene A. Smith, and analyzed un- 

 der his direction at the University of Alabama by Chappell Cory, 

 Like other analyses published in the same volume, this was made by 

 Peter's acid digestion method (described by Hilgard in Tenth Cen- 

 sus, 5:72; Soils 340-343; and elsewhere). The percentages of the 

 various constituents represent what is dissolved by hot hydrochloric 

 acid in five days, and in some cases may be much less than the total ; 



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