FRUIT AND VEGETABLES. 



119 



half, and how much did he make on his outlay for plow- 

 ing and cultivating? 



390. In the spring of the third year he fertilized, 

 plowed, and cultivated the whole orchard and sprayed all 

 but 20 trees, 10 in the part uncultivated the previous year 

 and 10 in the cultivated part. These trees were left as 

 checks. The spraying cost 40 cents a tree. At harvest 

 time he gathered an average of three barrels of salable 



ENGINE POWER USED IN ORCHARD. 



Gas and oil engines are gradually replacing much of the work formerly done 

 by hand or horse labor. 



fruit to the tree from the 10 trees in the part uncultivated 

 the year before, four barrels each from the 10 trees in 

 the cultivated part, six barrels from the sprayed trees 

 cultivated only one year, and seven barrels from the 

 sprayed trees cultivated two years. He figured (1) the 

 difference in yield due to cultivating the orchard two years 

 as against one year; (2) the difference between the check 



