Florida Agricultural Experiment Station


irregular line near the southern edge of Section A. The land
was subsequently cleared and remained fallow throughout the
winter and spring of 1926. In March 1926 and again in 1927
corn was planted in the area, without any addition of fertilizer.
In September 1927 and again in 1928 the area was divided into
plots and tested for response to manganese, phosphates, potash
and copper, with a variety of different crops. In 1930, after
having received no fertilizer for almost two years, the area was
again divided into plots for a celery fertility experiment. Seven-
teen different fertility treatments were included, each replicated
six times on plots of 1/90 acre each. They were planted to
celery for the first time in the late fall of 1930, and celery was
planted each year thereafter until the final crop was harvested
in the spring of 1936, after which this series of plots was
abandoned and a new series begun in Area 3. Throughout this
period of six years other truck or cover crops were planted after
the celery was removed in the spring but none received addi-
tional fertilizer. Fertilizer was added only for the celery crop.
All celery strippings were removed from this area each year.
 Experimental Area 3 was broken out of native sawgrass in
the fall of 1933. This area is located in the south half of
Section D of the southeast sector at the Everglades Experiment
Station. It was moled at a depth of 30 inches throughout, at
an approximate spacing of 15 feet. It was plowed again in the
spring of 1935 and a third time in 1936. From the time it
had been broken in 1933 it had been disked several times to keep
down weed growth, although it was not kept in a continuously
fallow condition throughout this period. The entire area re-
ceived its first fertilizer treatment on January 26, 1937, five
days before the first celery plants were set. This treatment
consisted of a broadcast application of copper, manganese and
zinc sulfates, at rates of 100, 100 and 15 pounds per acre, re-
spectively, over the entire area. The area was divided into
40 plots, consisting of four plots each of 10 different fertility
treatments. The individual plot area was slightly less than
1/30 acre. These different fertilizer treatments were applied
on January 28 and the plants were set the first week in February
for the first celery crop on this area. All strippings from the
plots of this area were turned back to the soil upon which they
were produced.