1900.] 



PUBLIC DOCUMEXT — Xo. 33. 



31 



With such variations in relative standing, it will be agreed 

 we must interpret results with caution. Still, it is ])elieved 

 that the average yield of the ditierent salts should be pub- 

 lished as a matter of record : — 



Average Yield of Plots. 



* Two ounces or over. 



Conclusions. 



1. It will be noticed that the soil is potash hungry, for 

 every one of the salts used increases the yield. 



2. The high-grade sulfate of potash stands first. It has 

 with rare exceptions been found more effective in increasing 

 the yield than the muriate, with which it has been frequently 

 compared, and it gives better quality. We are justified in 

 the conclusion that the application of potash in this form 

 for the potato will give good results. It should be pointed 

 out that our soil is moderately heavy and retentive. On 

 drier sorts the muriate may compare with the sulfate more 

 favoral)ly. 



3. The comparatively new carbonate of potash-magnesia 

 ranks second. It is as carbonate that potash exists in wood 

 ashes, which, however, are believed to favor some forms of 

 scab. The fertilizer did not have that effect. This appears 

 to be, then, a very useful form of potash. In mechanical 

 condition it leaves nothing to be desired, being fine and 

 remaining dry under all conditions of weather. The price 

 is at present too high to allow its general use. 



