6i ^ POTATOES. 



1891. 

 i^Y H. C. TowNSEND, Fort Fairfield. Annual Repoff. 



"In this experiment all the fertilizers caused an increase in the 

 crop, but the combination of dissolved bone-black ana muriate of 

 potash produced the increase at least cost per bushel." 



MASSACHUSETTS (State Station), 1886. 



By C. a. Goessmann, Director. Annual Report. The experiments 

 of three years, from 1884 to 1886, are considered together. The 

 yield was largely increased by the fertilizers containing potash. In 

 1884 the plot that received muriate of potash was free from scab. 

 "The latter (manured with muriate), on the other hand, had the 

 smoothest skins and were almost entirely free from scab, which seri- 

 ously disfigured those from plots 2 and 3.** 



1893. 



Eleventh Annual Report. The experiment was made to compare the 

 effects of muriate of potash and sulphate of potash upon potatoes. 

 The results are as follows: 



"The yield of potatoes is in every instance larger in case sulphate 



of potash has furnished the potash of the fertilizer used, than where 



muriate of potash has served for that purpose." 



MASSACHUSETTS (Hatch Station), 1890. 



By H. H. Goodell, Director. Bulletin No. 14. 



"Potash for this crop, as for corn, seemed to be most deficient in 

 this soil. This is thus far the only experiment tried under my direction 

 on potatoes, and I am not justified in forming any sweeping conclusions. 

 It, however, appears to me likely that the 'special potato fertilizers' 

 in the market furnish too small a proportion of potash. It will pay, I 

 believe, to use them in moderate quantities, if at all, in connection 

 with sulphate of potash for the heavier and muriate of potash for the 

 lighter soils." 



1892. 

 By W. L. Phillips, Marblehead. Bulletin No. 18, April, 1892. 

 Soil — Gravelly loam. 



"These comparisons make it evident that potash was more bene- 

 ficial than either phosphoric acid or nitrogen. Alone, and in every 

 combination, it much more than pays for itself; but it is far more 

 effective when phosphoric acid is present than when used alone, and 



