32 EXPERI^IENT STATION. [Jan. 



Soy Beans. — The yield of soy beans, as will be noticed, 

 was considerably larger upon the sulfate of potash. We 

 have now carried through a similar experiment with soy 

 beans fifteen times. In seven of these trials the result has 

 been favorable to the sulfate of potash, and in one it was the 

 same on the two salts. The average of all trials is favor- 

 able to the sulfate, and it would seem that there can be 

 little doubt that where the two potash salts are continuously 

 used the sulfate rather than the muriate should be selected. 

 The superiority in yield on the former is usually much more 

 than sufficient to cover the small additional cost of that salt, 

 as compared with the muriate. 



Asparagus. — It will be noticed that the yield of aspara- 

 gus on the muriate of potash is more than 50 per cent, 

 greater than on the sulfate. This result in so far as it goes 

 appears to furnish evidence that the customary practice of 

 depending largely upon the muriate as a source of potash 

 for the asparagus crop is sound. 



Rhuharh. — The yield of rhubarb this year is much 

 larger than in any preceding year during which this crop 

 has been grovvm in this experiment. In the earlier years the 

 yield on the sulfate of potash has been moderately greater 

 than on the muriate; this year it is very much greater, ex- 

 ceeding the yield on the muriate by about 80 per cent. 

 Should further experiment support the evidence afforded 

 thus far by this, it would appear that rhubarb growers in 

 general will be wise to depend upon the sulfate rather than 

 the muriate as a source of potash for that crop. 



Raspberries and Blackherries. — The yield of both these 

 crops is small on both fertilizers, that of raspberries es- 

 pecially so. During the three or four years the experiment 

 on these plots has continued, the sulfate has invariably given 

 better results than the muriate. Particularly noticeable has 

 been the difference in the degree of winter-killing. The 

 canes upon the plot to which muriate of potash is applied 

 seem to be much less hardy than those on the plot where 

 sulfate is used; and, with little doubt, the greater yield on 

 the latter potash salt is mainly a consequence of the fact 

 that the injury due to winter-killing is so much less. 



