A Cover Crop Program for Florida Pecan Orchards 27

Representative samples of nuts were collected from each tree
in the experiment at harvest, measured by hand and the per-
centage of kernel determined.
 Frotscher:-During the first period the nuts produced by the
trees in legume Plots 1 and 2 ran 70 percent or more to the
larger sizes, while from the check and oat Plots 3 and 4 only
39 percent were in this group. However, there were practically
no differences in the percentage of kernel in the samples from
the different plots. In the second period without a planted
cover crop and where oats and Crotalaria spectabilis were grown
in winter and summer, respectively, the trees produced a higher
percentage of 15/16 inch and larger nuts than where the legumes
were grown. However, because of a heavy yield there was a
greater quantity of nuts in the larger grades in the legume than
in the non-legume and check plots. Again, the percentage of
kernel did not vary to any great extent but ran slightly higher
than during the first period.
 In Table 6 details are given for the 1934 crop. An examina-
tion of the data shows that trees in the legume plots produced
a lower percentage of nuts sizing 15/16 inch and larger than
those in the winter non-legume and check plots. However,
since yields from the legume plots were much heavier, there
were more nuts in the larger sizes from these plots. The per-
centage of kernel varied very little in the different plots, but
it was somewhat higher than during 1928-1931.
 The average .size for 1928-1934 showed somewhat higher per-
centages of larger nuts from the trees where the legumes were
grown than for the other treatments. This was because of high
percentages of larger nuts obtained during the first period when
the yields were much lighter. Moisture conditions were not so
favorable during this time and the mulch produced by the winter
cover crops seems to have been more effective. It will be noted
also that kernel percentages were about the same when averaged
over the entire period for the different plots.
 Stuart:-During 1928 to 1934 more than half of the nuts in
 all plots were 14/16 inch and smaller. The percent kernel did
 not vary greatly when averaged, although it was somewhat less
 for the nuts produced in legume Plot 2-A to which no sulfate
 of ammonia was applied.
 In 1934 the trees in legume Plot 2-B, which received additional
 ammonia, produced the highest percentage of 15/16 inch nuts
 and larger. Nut sizes varied somewhat in all plots but did not