84 



RESULTS OF THE ADDITION OF POTASH TO 



Nothing 



Hard corn, bu. per A., 5.81 

 iStover, lbs. per A., 935 



Value of average net iucremeut, $15.92. 



Financial result, 12.72 gain. 



RESULTS OF THE ADDITION TO NOTHING OF 



Hard corn, bu. per A., 

 Stover, lbs. per A., 



■Complete" 

 fertilizer. 



30.94 

 1960 



Barn-yard 

 manure. 



35.74 



4780 



Land 

 Plaster. 



— 1.06 



—40 



Fertilizer. Manure. Plaster. 



Value of net 



increment due to $25.01 $35.18 

 Value of decrease due to $0.79 



Financial result, 13.01 gain 10.18 gain 1.51 loss 



Lime. 



.54 

 —40 



Lime. 



$0.25 

 0.71 loss 



These comparisons indicate the surpassing importance of potash 

 for corn upon this soil, thus confirming the general result of the work 

 with corn during the two preceding years. In view of the almost 

 universal response of corn to this fertilizer upon soils of so many 

 different classes and of all degrees of iertility, and in so many widely 

 separated localities, the conclusion that it should be a prominent 

 ingredient of fertilizers used for this crop appears to me irresistible. 



Nitrate of soda also, in this experiment, appears to have been 

 much more than usually beneficial, and more than paid for itself 

 wherever used in combination with potash. 



A fertilizer supply iy^g per acre : nitrogen, 25 to 30 pounds ; potash, 75 

 to 80 pounds, and perhaps 25 pounds of phosphoric acid, should give 

 profitable crops of corn on such a soil as this. 



