EXPERIMENTS CONDUCTED WITH A VIEW TO CONTROLLING DISEASE. 47 



TABLE XVIII. MANURIAL EXPERIMENTS WITH CLEOPATRA APPLE TREES, ETC. continued. 



Plot 

 No. 



Manure. 



Tree Sound Fruit. Pitted Fruit. Total. Per cent. Pitted. 



7 Check no manure 



f Sulphate of ammonia 

 8 | Sulphate of potash 

 ( Special bonedust 



I Ordinary superphosphate 

 9 j Sulphate of ammonia . . 

 1 Sulphate of potash 



10 Sulphate of iron 



Ibs. 

 1-5 

 0-25 



17 

 7-5 



29 



11 



66-25 

 11-04 



17 



6 



3 



7 



6 

 16 



55 

 9-17 



6 

 21 

 11 



4 

 25 



8 



75 



12-5 



20 



Ibs. 



208-5 



186-25 



228 



216-5 



163 



209 



1211-25 

 201-87 



194 

 175 

 98 

 179 

 204 

 186 



1036 

 172-67 



189 

 160 

 231-5 

 137 



198 



220 



1135-5 

 189-25 

 424 



0-72 

 0-01 

 7-45 

 3-46 

 17-79 

 5-26 



5-47 



8-76 

 3-43 

 3-06 

 3-91 

 2-94 

 8-60 



5-31 



3-17 

 13-13 



4-75 



2-92 



12-63 



3-64 



6-60 

 4-71 



SUMMARY FOR SEASON 1915. 



The heaviest yield was obtained from a single tree, to which 1 Ib. of sulphate of iron had been 

 applied, and no tree in any of the other plots had approached it. The yield was 424 Ibs., or 10J bushel 

 cases. 



There were 3 unmanured plots of 6 trees each, and the average yield per tree was 167 Ibs.; 

 while in the manured plots it. was 164 Ibs. 



The average percentage of Pit varied from 10 to 3-76, the lowest being in plot 2, which also 

 had the lowest average yield, and the highest in plot 5, with superphosphate and potash. 



Of the fertilized plots the highest average yield per tree, viz., 189 Ibs., was obtained from 

 plot 9, with superphosphate, potash, and ammonia ; and the lowest average yield, viz., 138 Ibs., 

 from plot 2, with superphosphate and potash. 



In the three unmanured plots the percentage of Pit was 9' 56, 7'17, and 5-47 respectively. 



