24O FLORIDA GEOLOGICAL SURVEY-SEVENTH ANNUAL REPORT. 
subsoil and contains considerable numbers of small fresh-water 
shells, such areas being locally known as ‘‘shell hammocks.” 
The Parkwood fine sandy loam is of small extent, being limited 
to 1 a number of small areas in Sumter and Citrus Counties, in the re¬ 
gion of Panasofifkee Lake and Withlacoochee River. The areas oc¬ 
cur partly surrounding the Warm Spring hammock and on the bor¬ 
ders of swamps and small islands in the swamps. They are low ly¬ 
ing, flat, and barely elevated above the swamp; hence are poorly 
drained. The exceptions are those areas occurring along the With¬ 
lacoochee River banks, which have good drainage. 
It appears that the sandy surface soil of this type consists of sedi¬ 
mentary material originally unconsolidated.* The subsoil is unques¬ 
tionably residual from marl and limestone. 
The greater part of the Parkwood fine sandy loam is cleared and 
under cultivation. Around the hammock at Coleman the same 
trucking crops that are grown on the Parkwood clay loam are 
grown, namely, cabbage and tomatoes, but being less productive it 
is not so much in favor. It has a wider crop adaptation, however. 
Irish potatoes and other truck crops, as well as the general farm 
crops, yield exceptionally well upon it. Around Lake Panasofifkee 
citrus fruits are grown, and, as on the Parkwood clay loam, no ap¬ 
plications of commercial fertilizers are made. 
This soil supports a hammock growth similar to that of the Park- 
wood clay loam, with pines encroaching upon it where it grades into 
the adjoining sandy lands. 
The value of this land is high and it brings about as much as the 
Parkwood clay loam in the Warm Spring hammock. The areas 
around Lake Panasofifkee that are not in orange groves are less 
valuable because of their distance from railroads. 
The average results of mechanical analyses of samples of the soil 
and subsoil of the Parkwood fine sandy loam are shown in the fol¬ 
lowing table: 
