. 33 



RESULTS OF THK ADDITION OF POTASH TO 



Hard Corn, bush, per acre, 

 Soft Corn, " " " 

 Stover, pounds, " " 



Si 



2.8 



— .9 



170 



Value of average net increment, 

 Financial result. 



$1.28 

 1.92 loss. 



RESULTS OF THE ADDITION TO NOTHING OF 



Value of increment due to fertilizer, 



Financial result, 



Value of increment due to manure, 



Financial result, 



Value of increment due to plaster, 



Financial result. 



Value of decrease due to lime, 



Financial result. 



$5.94 



6.06 loss. 

 $9.50 

 $15.50 loss. 

 $ .98 



.26 profit. 

 $ .18 

 1.14 loss. 



The differences brought out by these comparisons result in ranking 

 the three ingredients of the fertilizers about as estimated during the 

 period of growth. Phosphoric acid produces the largest increase, 

 then come nitrogen and potash in the order named. The differences 

 are, however, small ; and the increase is, in no case, sufficient to pay 

 for the fertilizer. Barn-yard manure does much better than " com- 

 plete fertilizer" which indicates either a more general exhaustion than 

 the latter can meet or a beneficial physical or chemical effect from the 

 manm-e. 



Plaster appears to be somewhat beneficial and produces an apparent 

 small profit ; but the diflJ"erence is too small to have any special signi- 

 5 



