M POTATOES. 



NORTH CAROLINA, 1888. 



By T. W. Jones, Columbia, Tyrrel Co. Annual Report. 



"Kainit alone yielded a profit of $9.30 from an investment of $2.80." 



OHIO, 1886. 

 By N. S. Townsend, Director. Fifth Annual Report. 



"Wherever potash, alone or in combination, was used, less scabby 

 potatoes were found than upon any other plots. It may not be safe, 

 however, to infer from this that potash prevents scab, but it seemed, 

 in this case, to have that effect to some extent." 



OREGON, 1893. 

 By H. T. French, Agriculturist. Bulletin No. 24. Kainit produced 

 about 145 bushels per acre against 81 bushels per acre unmanured. 

 Unleached ashes produced only 48 bushels. 



"This fertilizer, as seen in the table, nearly trebles the yield over 

 the plot where no fertilizer was used. . . . What is said of guano 

 is largely true of kainit (German potash salts) and super-phosphate. 

 These substances cost less than the guano." 



RHODE ISLAND, 1890. 

 By C. O. Flagg, Director. Third Annual Report. 



"Muriate of potash in combination produced 76 bushels per acre 

 more than the sulphate of potash in combination." 



WEST VIRGINIA. 1892. 

 By D. D. Johnson, Agriculturist. Bulletin No. 20, January, 1892. 



"The best results were obtained from the combination of kainit 

 (800 lbs. per acre) with acid phosphate, causing an increase of 161 1-3 

 bushels per acre. The increased yield caused by the use of fertilizers 

 was at the rate of 161 1-3 bushels per acre, which, at 40 cents per 

 bushel, amounts to the sum of $64.53 1-3, leaving a net profit of 

 $57.43 1-3 per acre, less the increased labor required to take care of 



the increased crop." 



1893. 

 By D. D. Johnson, Agriculturist. Bulletin No. 29. This experi- 

 ment was carried out at the Station and was a repetition of the ex- 

 periment made in 1891. Three varieties of potatoes were used. 

 "A combination of kainit and S. C. dissolved bone produced the 

 greatest amount of large and the smallest percentage of small tubers." 

 "Here again we have a remarkable agreement with the facts 

 brought out in the experiment of 1891. Plot No. 5, without any fer- 

 tilization, produced 88^ lbs., while plot i, with 43 lbs. kainit, produced 

 140.4 lbs." 



