41 



KESULTS OF THE ADDITION TO NOTHING OF 



Value of increment due to fertilizer 



Financial result, 



Value of increment due to manure, 



Financial result, 



Value of decrease due to plaster, 



Financial result, 



Value of increment due to lime, 



Financial result, 



$5.94 



6.06 loss. 

 $10.08 

 14.92 loss. 

 $1.70 



2.42 loss. 

 $3.5.s 



2.62 profit. 



From these comparisons we see that none of the fertilizers used 

 appear to have caused much increase in crop. Between nitrogen, 

 phosphoric acid and potash there is no essential difference. This soil 

 appears to have required one about as much as another; but gave a 

 profit on none, whether used singly or in any combination. Both 

 "complete fertilizer" and barn-yard manure gave considerable 

 increase in crop ; but in neither case in paying quantities. Even if 

 we consider the manure as only half exhausted, we shall still have a 

 loss on its use at the price allowed. 



Lime alone, in this experiment, appears to have caused a paying 

 increase ; but this is small. Plot 14 was undoubtedly better naturally 

 than plot 15. Still the yield on 14 was compared not with 15 but 

 with the average product of 12 and 15. It, therefore, appears quite 

 certain that the lime was moderately beneficial. This, indeed, we 

 might naturally expect on a good soil rich in organic matter as this 



