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 14 acres five times was 

 $55-7^, 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 S 1 A cents . . .66 



55 hours' labor for man, at 17% 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 even-thing. 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. 



