SPRAYS AND SPRAYING 139 



Cost of Spraying and Profits Derived. In 1903, 

 at the farm of J. V. Salisbury & Son, Phelps, N. Y., 

 the total expense of spraying 1 1 4 acres five times was 

 $55.76, the items being as follows: 



504 pounds of copper sulphate, at 6 cents . . $30.24 



8 bushels of lime, at 35 cents 2.80 



12 pounds of white arsenic, at 5> cents . . .66 



55 hours' labor for man, at I7/^ cents . . 9-63 



47 hours' labor for team, at 17)^ cents . . 8.23 



Wear of sprayer 4.20 



$55.76 



Cost of spraying per acre for each application was 

 80 cents. 



Bushels 



Yield of sprayed rows, per acre 147 



Yield of unsprayed rows, per acre . ' . '. 83 



Increase in yield per acre ....... 64 



A good showing, considering that there was no blight 

 this year. 



64 bushels per acre on 14 acres (896 bushels), worth . $448.00 

 Less cost of spraying 55.76 



Net profit on 14 acres $392.24 



Net profit per acre 28.01 



Mr. Salisbury sprayed potatoes for his neighbors at 

 80 cents per acre and furnished everything. In other 

 experiments conducted in 1 904 by the Geneva Experi- 

 ment Station, the cost of each application was as low 

 as 6 1 cents per acre, and the net profit as high as 

 $60.00 per acre. 



(N. Y.) Geneva Bui. 241, p. 275. 



