PRUNING THE DIFFERENT TREE FRUITS 265 



(E. W, MitcTiell) 



Fig. 99. The brush pusher (Fig. 97) in operation. 

 TABLE 37 



Percentage of Trees Pruned and Number Pruned per Day, 

 BY Age, Hilton Area, 1928 to 1931* 



Age of Trees in 1930 



Records t 



Total 

 Bearing Trees 



Trees 

 Pruned 



Trees Pruned 

 in 10 Hours 





Number 



Number 



Percent 



Number 



60 or more 



92 



18,048 



43 



6.2 



50 to 59 



71 



11,696 



46 



4.7 



30 to 49 



106 



18,385 



48 



6.0 



20 to 29 



157 



37,040 



65 



12.8 



10 to 19 



118 



25,873 



48 



12.7 



All ages 



544 



111,042 



53 



9.0 



* Adapted from Relation of Soil and Cultural Practices to the Costs and Returns in 

 Producing Apples, Hilton Area, Monroe County, New York (unpublished thesis for degree 

 of Ph.D., Cornell University, p. 33, 1934), by C. C. Spence. 



t Includes all cost records taken each year. 



