BUD VARIATION IX THE VALENCIA ORANGE. 
107 
are also typical of this group, and many others in the list are classified 
with these, though they are not as representative as those mentioned. 
The tree listed in rank 54 is typical of the group commonly called 
alternate bearers or biennial bearers ; that is, a season of normal or high 
3 I o 
200 
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Tig. 1. — Diagram showing the average annual production of the 75 individual trees of the Valencia strain 
in the investigational performance-record plat for the 4-year period, 1912 to 1915, inclusive. The trees 
are here ranked in the order of their average total crop, expressed in poimds. The weight of the fruit of 
the three commercial grades is also shown for each tree. 
production is followed by a small crop the next year, with the return 
of a normal crop the succeeding season. Usually these trees show a gen- 
eral increase in production during a period of years. This tree (rank 
54) produced its small crops in the even years. The tree listed in 
rank 35 is also of this alternate-bearing character but bears its small 
