154 
fertilized plats over the unfertilized. There were a large 
number of pines which were brought over the minimum 
weight by the application of fertilizer, and their value w^as 
therefore actually doubled, besides receiving the regular 
rate of one cent a pound for all weight over three pounds. 
A glance at the tabulated results will show that the greatest 
yield per acre was 15.35 tons made by 12-A, while the lowest 
was 10.29 tons from plat 1. The greatest gain over check 
was 8049 pounds, obtained from 2-B, and the greatest loss 
recorded was 1634 pounds from 7-A. From a commercial 
standpoint the greatest profit from a fertilized plat was $72.24 
per acre from 2-B, and the greatest financial loss was $29.84 
per acre from 7-A, which was also the section showing the 
greatest agricultural loss. With the exception of plats 10 and 
11, the greatest gain per acre and the greatest profit happened to 
be derived from the same section. Although this need not neces- 
sarily be true, it appears from the results to be so in a general 
way, with the present prices of pineapples and fertilizer material. 
It has been demonstrated that superphosphate gave poor 
results when applied alone at the rate of eighty pounds of 
phosphoric pentoxide per acre, but that much better results 
were obtained with the same material and the addition of 
750 pounds of lime per acre. While our results with super- 
phosphate alone do not show poor results, such as were ob- 
tained in Florida, the results obtained at the Florida Station 
with re gard to superphosphate and lime are certainly cor- 
roborated. Where the lime and superphosphate are applied 
together, the water soluble phosphoric acid is changed to 
citrate soluble and water insoluble calcium salts, which prob- 
ably accounts for the better results obtained from the limed 
plats. 
It has also been shown- that nitrate of soda has given poor 
results when applied to pines. Our results corroborate this 
fact, and it might be mentioned again that of the nine plants 
which failed to fruit, six were in plat 6 and five of the six 
were in section A, which would seem to indicate that nitrate 
of soda not only affects the growth of the plant unfavorably 
but also exerts an inhibiting influence upon the productions 
of fruit. 
If we take the actual average of the seven different sections 
containing a common fertilizing element, we get a figure rep- 
resenting the average pineapple of all the; sections containing 
the common element. By repeating this process with all the 
different ingredients used, we get a series of interesting fig- 
2 Florida Bulletin Xo. 73. 
