16 



New Hampshire Experiment Station [Bulletin 239 



TABLE XII. 

 Relation of Method of Fertilization to Yield, Labor and Costs per Acre and per 



Bushel. 1926-1927. 



Increases in fertilizer in 500 pound units increased yields by 

 15 to 30 bushels in the north, but because of dry weather in 1926 

 and blight in 1927 the southern part of the state showed only a 

 tendency toward increased yields. 



Increases in the amount of fertilizer applied did not produce 

 consistent increases in yield. In Coos and Grafton Counties an in- 

 crease from 831 pounds to 1,344 pounds produced a gain of 29.0 

 bushels. Another increase to 1,876 pounds added only 12.0 bushels 

 to the total yield. At a cost of $2.00 a hundred pounds of feriilizer, 

 an additional 500 pounds must result in at least a $10.00 increase in 

 crop value to meet the additional fertilizer expense, and a further 

 increase of $2.50 to meet other costs including extra labor. In Coos 

 County a 50 cent crop would require 20 bushels increase to pay for 

 the fertilizer and 5 bushels to pay for other costs. In the southern 



TABLE XIIL 



Relation of Amount of Fertilizer to Manure and Other Cost Factors. 1926-1927. 



