36 



EXPERIMENT STATION. 



[Jan. 



The average yields under the varying fertilizer treatments 

 are as follows : — 



Potatoes. — Average Yields jier Acre (Bushels). 



Potash Salt. 



Large. 



Small. 



No potash (plots 1, 9, 17, 25, 33) , . 

 Kainit (plots 2, 10, 18, 26, 34) , 

 High-grade sulfate (plots 3, 11, 19, 27, 35), 

 Low-grade sulfate (plots 4, 12, 20, 28, 36), 

 Muriate (plots 5, 13, 21, 29, 37), . 

 Nitrate (plotse, 14, 22, 30, 38), , 

 Carbonate (plots 7, 15, 23, 31, 39), 

 Silicate (plots 8, 16, 24, 32, 40), . 



141.40 

 207.03 

 217.66 

 221.09 

 223.70 

 215.33 

 209.86 

 199.86 



.39.00 

 31.03 

 31.73 

 30.56 

 38.33 

 36.23 

 53.10 

 42.13 



It will be noticed that the no-potash plots on the average 

 give a yield mnch inferior to that produced on the plots 

 receiving potash. The best average yield is produced by the 

 muriate, but the differences between the yield on this potash 



