Fertilizer Experiments With Pecans


made only 21.0 square inches during the time the experiment
was conducted.
 With the Curtis, the most growth was made by the trees
fertilized with the 6-6-4 mixture, and second, those that received
the 4-6-6. They made an average total wood production per
tree of 82.4 and
75.6 square inch-
es, respectively,
while the checks
made an average
growth of 49.2
s q u ar e inches
each. Two of the
treated plots pro-
duced slightly less
wood growth
than that of the
check. These were
fertilized with
mixtures that
were relatively
high in ammonia;
one received ap-
plications of an 8-
6-2 and the other
an 8-4-4. (Fig. 3.)
 Yield. The
average annual
yield of the Ken-
nedy and Curtis
trees for each
plot is shown in
Table 2. The Ken-
nedy trees pro-
duced a few nuts Fig. 3.-Kennedy trees, Bradford County. A, un-
from the begin- fertilized check; B, fertilized.
ning of the experiment but the bulk of the yield was made from
1927 to 1931, or the seventh to eleventh years, inclusive, after
the trees were set.
 These data show that the Kennedy trees that gave the high-
est yield were fertilized with a 4-8-4, with the 6-4-6 and 8-6-2