40 EXPERIMENT STATION. [Jan. 



The average yields on the different potash salts were at the 

 following rates per acre : — 



Bushels. 



Muriate of potash : — 



No. 1 onions, 480.10 



Pickling onions, . . . . . . . 77.80 



Sulfate of potash : — 



No. 1 onions, 557.70 



Pickling onions, 57.97 



For rhnbarb the muriate of potash gave the larger crop, at 

 the rate j^er acre of 77,400 ponnds, against 64,828.7 pounds on 

 the sulfate. 



The cauliflowers gave the better crop on the sulfate, the rates 

 per acre being as follows : — 



Pounds. 



Muriate of potash, 24,695 



Sulfate of iDotash, 30,691 



The asparagus gave the better yield on the sulfate, but the 

 difference was small. The rates per acre were as follows : — 



Pounds. 



Muriate of potash, 4,951.0 



Sulfate of potash, 5,176.7 



The results with onions and with cauliflowers arc the most 

 striking, and are in close agreement with results previously 

 obtained. The cauliflower, like the cabbage, seems to be more 

 certain to give a satisfactory crop on the sulfate than on the 

 muriate on soils fairly retentive of moisture. 



The crops on the plot in this field, where manure is used 

 without fertilizers, are in most cases still nearly as good as on 

 the plots where fertilizers are used in addition to the manure; 

 but we would again point out that the history of this plot and 

 its manurial treatment previous to its inclusion in this field 

 were different from those of the other plots. N^evertheless, 

 the fact that the crops on this plot still compare so favorably 

 with those on the plots where fertilizer also is used raises the 

 question whether the latter is a benefit. 



TV. In the experiments comparing the different potash 

 salts, which were begun in 1808, and in which these salts are 



