114 POMOLOGY 



Table XXII 



RELATION OF THINNING VERSUS NON-THINNING TO THE TOTAL CROP 



Average a tree, lbs. 



Colo. Unthinned 2 trees 843 



Thinned 8 trees 610 



Utah Unthinned 4 trees 254 



Thinned 4 trees 269 



Ohio Unthinned 6 trees 924 



Thinned 9 trees 954 



W. Va. Unthinned 3 trees (young) 159 



Thinned 10 trees (young) 116 



Unthinned 1 tree 664 



Thinned 1 tree 648 



Unthinned 1 tree 670 



Thinned 1 tree 468 



Unthinned 1 tree 534 



Thinned 1 tree 528 



Average unthinned trees 578 lbs. 



Average thinned trees 513 " 



The average difference in these particular experiments 

 is 65 pounds or about 13^ bushels to a tree in favor of the 

 unthinned tree. While no set of figures could be accepted as 

 representing the exact relation of thinning to the total crop, 

 as no two experiments would be alike since so many factors 

 are involved, yet they are indicative of what might be ex- 

 pected. Although these figures show that the total crop may 

 be somewhat reduced, they must be viewed in the light of the 

 discussion under size of fruit and it must be realized that the 

 economic value of the crop is very likely to be higher from the 

 thinned trees. 



102. When to thin. — The time for thinning will vary 

 with the variety, season, latitude, and possibly other factors. 



