66 TOBACCO. 



"There is a handsome profit by using fertilizers in the best com- 

 binations." 



1893. 

 Experiment on Tobacco, Corn and Potatoes. Bulletin No. 45. 



General summary: "Results obtained in 1892 are almost identi- 

 cal with those of the last four years, that is : 



"i. Wherever potash was one of the ingredients of the fertilizer 

 used, whether on corn, tobacco or potatoes, there was an increased 

 yield. 



"2. That where phosphoric acid or nitrogen or both were used 

 without potash, there was scarcely any increase in yield over those 

 plots receiving no fertilizer. 



"3. That there was a profit in the use of fertilizer in every in- 

 stance where potash was one of the ingredients." 

 By a. M. Peter. Bulletin No. 46. 



"For lack of space we can only call attention here to the very re- 

 markable agreement of these results for a series of years in showing 

 the benefit derived from a liberal use of potash fertilizers on the soil 

 of the Station farm. In nearly every instance potash produced a very 

 marked increase in the yield; and, in some cases, it was the most profit- 

 able fertilizer used. The use of potash and nitrogen, or of potash 

 nitrogen and phosphoric acid together, often produced a still greater 

 yield, but the profit was often taken up in the additional cost of the 

 nitrogen, which is the most expensive constituent of fertilizers. A very 

 conspicuous exception to the above statement was proven in the case 

 of tobacco,\vhere the greatest profit was obtained from the use of pot- 

 ash and nitrogen together. The tobacco crop requires a great deal of 

 both of these, but a comparatively small amount of phosphoric acid." 



MARYLAND, 1894. 

 By H. J. Patterson, Chemist. Bulletin No. 26. 



Experiments were made by the Station in the principal tobacco 

 districts of the State. Regarding the effect of potash salts upon the 

 burning quality, it was found that "sulphate of potash produced a 

 better burning tobacco than any other of the potash salts." 



"High grade sulphate of potash is the best source of potash." 

 NORTH CAROLINA, 1893. 

 By R. p. McAnally, Saxon, Rockingham Co. Bulletin No. 89. 

 Soil — Dark grav fftndy land, newly cleaned. This experiment was 



