45 



RESULTS OF THE ADDITION OF POTASH TO 



Value of increment due tu fertilizer, 



Financial result, 



Valne of increment due to manure, 



Financial result, 



Value of decrease due to plaster, 



Financial result. 



Value of increment due to lime, 



Financial result. 



$16.22 



4.22 profit 

 $13.34 

 11.66 loss 

 % .86 

 1.58 loss 

 $2.78 

 1.82 profit 



These comparisons make it evident that this soil needed potash. 

 Neither alone nor in any combination did nitrogen or phosphoric acid 

 appear to do much good, and in some cases the result of their use was 

 an apparent decrease in crop. In both cases with a single exception 

 the results of their use were invariably a financial loss. This excep- 

 tion is plot 14 where the addition of bone-black appears to have 

 caused an increase sufficiently great to pay for its use. From the 

 fact, however, that the addition of bone-black to potash on plot 11 

 was not beneficial, it may be concluded that the increase apparently 

 due to phosphoric acid in plot 14 was produced by accidental causes. 



