Xew York Agricultural Experiment Station. 31 



Table Showing Amount of ^^^ertilizing Constitdtents Used. 



An examination of the foregoing data shows : 



1. That the amount of nitrogen in 1,000 pounds of different 

 fertilizers varied from 26.1 to 45 pounds. 



2. That the amount of available phosphoric acid varied from 

 58.5 to 97.8 pounds in 1,000 pounds of different fertilizers. 



3. That the amount of potash varied from 61.5 to 115.5 pounds 

 in 1,000 pounds of different fertilizers. 



The fertilizers used are all supposed to be specially adapted for 

 potatoes, but we see considerable variation in composition. They 

 vary the least in nitrogen between the highest and lowest amounts 

 of this kind of plant-food contained in them. They vary a little 

 more in the amount of available phosphoric acid contained in 

 in them ; while, in potash, the highest one contains nearly twice as 

 much as the one containing the lowest amount of potash. These 



