**2. It appears that neither acid phosphate nor nitrate of soda, 

 when used separately or in combination with each other, were of much 

 or no benefit, but that when either was used 'with Sulphite of potasli 

 the results were beneficial as to yield; the greatest yield being pro- 

 duced when both were applied together with sulphate of potaSh.*" 



The effect of fertilizers on the quality: "It appears from the re- 

 sults that the potatoes from the plots fertilized with potash sulphate 

 alone contained the largest amount of dry matter, and were, therefore, 

 considered the best in quality." 



1891. ,,,) .^. : 



Bulletin No. 37, December 1891, page 13. Thehighest profit of $23.40 

 resulted from muriate of potash. - ., ,. 



"By referring to the table it would seem that potash greatly in- 

 creased the yield, while phosphoric acid and nitrogen gave some 

 beneficial effects." 



1895. ; i 



By M. A. ScovELL, Director. Bulletin No. 61. 



"The season was very unfavorable for j6btatoes, yet t!h6 effect of 

 potash was proportionately as great as in previous expefirrlfents. The 

 average yield from the unmantired plots wak 43 bushfels of potatoes 

 per acre, while muriate of potash aldne hiore than doubled the crop, 

 and the complete mixture containing 160 lbs. of muriate of potash 

 produced 126.8 bushels of potatoes." 



LOUISIANA, 1889. 

 By W. C. Stubbs, Director, Baton Rouge. Bulletin No. 26. 



"In five cases the meal and kainit gave a larger yield than meal 

 and acid phosphate, despite the fact that, the stand of the former was 

 inferior. This would seem to indicate that potash is of some benefit." 



MAINE, 1890. 

 Farmers' Experiments, by O. B. Keene, Easton, Aroostook Co. 

 Annual Report, Part III. Potash and ammonia produced a large 

 increase of potatoes in the experiment. 



"This experiment is interesting in showing the remarkable effect 

 of commercial fertilizers on some soils. Tile aver'a'ge bf the 'plots 

 receiving no fertilizers was 132 bushels per acre. Thie average of the 

 plots receiving nitrate of soda and muriate df potash was 262 bushels 

 per acre. Here the crop was doubled *by adding 150 lbs. of hitrat6 bi 

 soda and 100 lbs. of muriate of potash. The cbst of the cheriiib^ls in 

 this case was about 4.2 cents per bushel." 



