BUD VARIATION IN THE WASHINGTON NAVEL ORANGE. 137 
weights of the fruits of the different groups. This diagram shows 
graphically the fact that the heaviest bearing trees produce the largest 
proportion of the most desirable and valuable sizes of fruits, namely, 
200, 176, 150, and 126 fruits per box. The most productive trees also 
bear the largest proportion of the Orchard grade, or first-grade, fruits, 
as shown by this diagram. On the other hand, the lowest producing 
trees bear a much larger proportion of extremely small and extremely 
large fruits, both of which are usually undesirable from the market 
standpoint. Further, the lowest producing trees bear a smaller per- 
centage of the first-grade and a larger percentage of second-grade 
and cull fruits than the highest producing trees. 
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Fig. 12.— Diagram showing the production by commercial sizes and grades of the crops of the 10 highest and 
10 lowest producing trees, irrespective of strain, in the investigational performance-record plats of the 
Washington Navel orange. The figures indicate the proportion of each size or grade to the total crop, 
calculated from the number of fruits produced during a 4-year period, 1912 to 1915, inclusive. Figure 11 
shows similar comparisons based on the weight of the crop. 
Figure 12 shows the same comparisons as figure 11, but in this case 
the percentages are based upon the number of fruits instead of their 
weights. This diagram brings out even more forcibly than does 
figure 1 1 the fact that the heaviest producing trees bear the largest 
proportion of the most desirable sizes and best grade of fruits. 
This correlation of heavy yield and superior commercial grade in 
the production of Washington Navel orange trees of the Washington 
strain is very important from the standpoint of the standardization 
of the variety through bud selection based on performance records. 
