32 EXPERIMENT STATION. [Jan. 



sible. There were, moreover, a few plots in which considerable 

 damage was done by insects. The results, therefore, are not 

 to be reported in detail at this time, but the following conclu- 

 sions seem to be fully warranted as the result of observations 

 and records so far made. 



1. The use of some fertilizer will clearly prove profitable 

 on many bogs. The average product on Ihe no-fertilizer plots 

 (7 in number) in our experiments this year was 7.5 bushels per 

 plot, or at the rate of 150 bushels per acre. The average prod- 

 uct on the fertilizer plots (19 in number) was 13.4 bushels per 

 plot, or at the rate of 268 bushels per acre. The average prod- 

 uct on the 10 plots to which a comiDlete fertilizer was applied 

 was at the rate of 306.5 bushels per acre. A complete fertilizer 

 was made up by the mixture of nitrate of soda, acid phosphate 

 and a potash salt, 



2. The use of nitrate of soda greatly promotes the growth 

 of vines, and seems also to be favorable to fruitfulness. Even 

 with the smallest quantity of nitrate used in our experiments 

 (at the rate of 200 pounds per acre) the growth of the vines has 

 been very luxuriant, — so luxuriant that the fruit, although 

 abundant, was poorly colored and probably inferior in keeping 

 qualities. The vine growth was so rank that another year the 

 rate at which nitrate is used will be greatly reduced. It is he- 

 lieved thai nitrate in excess of 100 pounds per acre will seldom 

 he necessary. 



3. The influence of high-grade sulfate of potash appears to 

 be decidedly favorable. It promotes fruitfulness, good color 

 and high quality. The highest yield obtained on any of the 

 plots (223^ bushels, which is at the rate of 450 bushels per 

 acre) was produced where the maximum quantity of sulfate of 

 potash was used in connection with a moderate amount of ni- 

 trate of soda and acid phosphate. The total fertilizer applica- 

 tion to this plot was at the rates per acre : — 



Pounds. 



Nitrate of soda, 200 



Acid phosphate, ........ 400 



High-grade sulfate of potash, 400 



