1
---
20-0-0
2 3
--- ---
16-0-4 16-4-0
4 5 6
--- --- ---
12-0-8 12-4-4 12-8-0
7 8 9 10
--- --- --- ---
8-0-12 8-4-8 8-8-4 8-12-0
11 12 13 14 15
--- --- --- --- ---
4-0-16 4-4-12 4-8-8 4-12-4 4-16-0
16 17 18 19 20 21
--- --- --- --- --- ---
0-0-20 0-4-16 0-8-12 0-12-8 0-16-4 0-20-0

It is quite apparent that in this scheme the entire field of fertilizer
formulas is covered in a regular way. In addition to this formula plan
other experiments are also under way to determine the influence of the
different fertilizing materials, carrying the phosphate, ammonia and
potash, and the influence of lime, rock phosphate, various green
manuring crops, etc. The experiments are carried out in commercial
orchards on several soil types and in several localities.

While the years the experiments have been running are yet too few for
any final conclusions, and the details too numerous to present in a
brief sketch here, there have nevertheless been some very interesting
results from the use of fertilizers which is readily shown by a few
lantern slides. Here is, for instance, a view of a fertilized and an
unfertilized section of one of our experiments in Georgia. The views
were obtained in the fall, and one could tell at a glance, not only that
the unfertilized trees were not as large, but also quite strikingly that
they had nearly lost all of their foliage, whereas the trees on the
fertilized section were still in full foliage, thus presenting a very
strong contrast. The effect of fertilizers on the foliage is shown also
in a series of slides of representative trees, from one of our
experiments in Louisiana, likewise taken in the fall. The first tree had
not been fertilized, the second had be