66 



Bulletin 303 



or more during 1914 — the year preceding that in which fruit was borne; 

 the second group contained spurs that had made less than two centimeters 

 growth in the same period. The percentage of spurs setting fruit in 

 each group is given in table 18. 



In 1 91 6 similar data were obtained at the station orchard at Ithaca. 

 All spurs that had elongated one centimeter or more in 191 5 were placed in 

 one class, and those that had grown less than one centimeter were placed 

 in another. The percentages of spurs that produced fruit are recorded 

 in table 19. It is seen from the table that spurs which have elongated 

 more than one centimeter during any one year are more likely to set fruit 

 in the following year than are spurs that have made a weaker growth.^ 



TABLE 19. Set of Fruit in 191 6 on Spurs Making Different Growth Lengths 



DURING the Preceding Year 



Casual observations during 191 5 seemed to indicate that flowers pro- 

 duced in the terminal bud of twigs making more than approximately 

 twenty centimeters length growth in 19 14 did not set as well as did flowers 

 on shorter twigs. In 1916, however, the same varieties were setting at 

 the ends of long twigs. 



' Yeager (1916), in a bulletin which was received here while this paper was being prepared for publica- 

 tion, likewise reports a correlation between the amount of growth that a spur makes in one year and its 

 production in the following year. 



180 



