SOIL SURVEY OF BRADFORD COUNTY^ FLORIDA. 287 
Mechanical analyses of Johnston tine sand. 
Number 
Descrip¬ 
tion 
Fine 
gravel 
Coarse 
sand 
Med¬ 
ium 
sand 
Fine 
sand 
Very 
fine 
sand 
Silt 
Clay 
261136 'd _ 
261127 
Soil_ 
Subsoil— 
Per ct. 
0.2 
.0 
Per ct. 
0.7 i 
.6 ■ 
Per ct. 
1.5 
1.8 
Per ct. 
45.9 
54.1 
Per ct. 
37.7 
35.0 
Per ct. 
6.7 
5.3 
Per ct 
7.7 
3 3 
JOHNSTON FINE SANDY LOAM. 
The soil of the Johnston fine sandy loam, to an average depth of 
about 15 inches, consists of a black or very dark gray fine sand or 
loamy fine sand, containing' a large amount of organic matter. Be¬ 
neath this the material is a light-gray or gray fine sand, which, at 
about 24 inches, grades into a drab and yellow mottled, plastic fine 
sandy clay or clay. In places the black surface layer is not more 
than 3 or 4 inches deep. The light-gray subsurface soil, or the ma¬ 
terial between the black surface and the stiff clay subsoil, is some¬ 
times mottled with yellow or brown, and occasional strata of orange- 
colored sand are encountered between these depths. 
The Johnston fine sandy loam is the predominating bottom soil 
of the county, and is developed along the larger stream's. The bot¬ 
toms along the Santa Fe and New Rivers are prevailingly of this 
type, though in places in such areas the clay does not occur within 
the 3-foot section. 
The type occupies the low first bottoms along the streams and is 
subject to frecpient overflow. Adjoining the stream there are some 
low, poorly drained areas where the surface seldom dries between 
overflows. These areas constitute a swampy phase of the type, 
which supports a natural growth consisting mainly of water or 
turkey oak, ironwood, haw, sweet gum, ash, and slash pine. Owing 
to the accumulation and decomposition of vegetable matter under 
conditions of poor drainage, the surface soil has a somewhat mucky 
nature, which is not possessed by the better drained part of the type. 
The Johnston fine sandy loam is composed of alluvial stream de¬ 
posits, consisting wholly of reworked Coastal Plain material. 
Practically none of the type is under cultivation. In most cases 
the merchantable timber has been removed and the remaining long- 
leaf pine is “boxed” for turpentine. The type is devoted largely to 
pasture and the production of naval stores. It cannot be profitably 
utilized for agriculture until reclaimed by means of extensive drain¬ 
age systems. 
