SOIL SURVEY OF BRADFORD COUNTY, FLORIDA. 269 
that organic compounds and some iron salts have been carried down 
in solution and precipitated at the place where the ground water 
usually stands or that fine particles of organic matter were carried 
down and fixed by filtration or some other process near the average 
level of the water table. In laboratory examination the material 
burns to a white fine sand, the small lumps quickly falling apart as 
the organic matter is burned out. 
In the alluvial group in Bradford County are found two types of 
the Johnston series, which form 4.4 per cent of the area of the coun¬ 
ty. The types are found in all parts of the county. 
Muck and Peat occupy considerable areas in the county, there 
being 41 square miles of the former and 22.1 square miles of the 
latter. The peculiarities of these types, as well as of the other series 
and types, will be discussed in detail in following pages. The names 
and extent of the several soils are shown in the following table, and 
their distribution is brought out by means of colors on the accom¬ 
panying map. 
Areas of different soils. 
Soil 
Acres 
Per ct. 
Soil 
Acres 
Per ct- 
Portsmouth fine sand. 
135,680 
39.3 
Johnston fine 
sandy 
Portsmouth fine sandy 
loam 
9,472 
2.7 
loam 
48,448 
14.0 
Norfolk sand 
6.848 
2.0 
Norfolk fine sand _ _ 
35,136 
10.2 
Tohnston fine sand_. 5,824 
1.7 
Muck 
26,240 
7.6 
Scranton fine 
sandy 
Portsmouth sand_ 
21,760 
6.3 
loam 
4,544 
1.3 
Peat 
14,144 
4.1 
Coxville fine 
sandy 
Norfolk fine sandy 
loam _ 
2,112 
.6 
loa m 
12,992 
3.8 
Leon fine sand 
11/776 
3.4 
Total 
344 960 
Norfolk loamy sand__ 
9,984 
3.0 
GRAY SOILS. 
SEDIMENTARY MATERIAL-SANDS AND CLAYS. 
Norfolk Series. 
The Norfolk soils are characterized by the light-gray to grayish- 
yellow color of the surface soils, and by the yellow color and friable 
structure of the sand or sandy clay subsoils. They occupy nearly 
level to rolling uplands throughout the Coastal Plain and have been 
derived from marine sediments. The lighter members of this series 
are used for the production of early, medium, and late truck crops, 
