SWIET POTATOES. 59 



"Taking the experiments of 1891 and 1892 together we find a 

 very remarkable agreement, even to minute details, and from the 

 results of these experiments, confining our conclusions to the peculiar 

 character and conditions of the soil upon which the experiments were 

 conducted, we conclude that the best results in commercial fertiliza- 

 tion, as tested, will be secured by a combination of potash and phos- 

 phoric acid in the ratio of 2 to i." 



POTATOES-SWEET. 



ARKANSAS. 1889. 



Experiment by A. E. Menke, Director, Newport Branch Station- 

 Third Annual report. Kainit used alone produced the highest 

 profit, amounting to $25.50. 



DELAWARE, 1890. 

 By M. Hayes, Dover. Bulletin No. 11. 



"Nearly $40 per acre was gained by the use of $4.00 worth of 

 potash." 

 Scarlet Clover as Green Manure and Fertilizer. 



"Of any single element, potash yielded the largest returns. Of 

 the combinations, scarlet clover, potash and phosphoric acid, costing 

 $8 per acre, returned $52 worth of potatoes." 

 By John Dager, Camden. Bulletin No. 11. 



"Taking all things into consideration, the muriate of potash gave 

 potatoes most uniform in size and best all around for the market, and 

 the probabilities are that Mr. Dager would succeed best by selecting the 

 muriate. Financially, $4 worth of this salt yielded I24 worth of product." 

 By C. Wright. Near Seaford, Sussex Co. Bulletin No. 11. 



"That story is that unfertilized ground can produce 41 bushels of 

 sweet potatoes per acre; but with an excess of potash the same ground 

 could produce 105 bushels, a gain of 64 bushels, worth $34, for an 

 expenditure of $4. Both phosphoric acid and nitrogen increased the 

 yields, but relatively to a very trifling extent. The presence or ab- 

 sence of potash determined the crop. 



*The results say plainly that potash was needed for that soil and 

 crop. 



Conclusion: "On the practical outcome of the series the results 

 are positive enough. Dropping all theories they stand as follows: 

 Muriate of potash when used alone at Dover returned $8 for every 

 dollar invested in its purchase." 



