110 BULLETIN 624, U. S, DEPARTMENT OF AGRICULTURE. 
far below the trees of the Valencia strain. The trees of the Barren 
strain are again found at the foot of the list. 
The percentages of the two grades making up the commercial crops 
in the various strains are shown graphically in figure 3. These data 
are based on the weight of the average production per tree for the 
4-year period, and the strains are arranged in the order of the per- 
centage of first, or Orchard, grade fruit produced. This diagram, 
like figure 2, can be interpreted rightly only by comparison with the 
data of actual yield as shown in Table IV. 
Figure 4 shows the average weight of fruit of the different commer- 
cial sizes and grades which was produced during the 4-year period 
on the 10 highest producing trees in the investigational performance- 
record plat in comparison with the corresponding yields of the 10 
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Fig. 3. — Diagram showing the percentages of Orchard and Standard grade fruit per tree in the average 
annual commercial crops of the trees of the various strains found in the investigational performance- 
record plat of Valencia oranges for the 4-year period, 1912 to 1915, inclusive. The strains are listed 
according to their proportion by weight of Orchard (or first) grade fruit. 
lowest producing trees of the plat. This diagram illustrates graph- 
ically the fact that the heaviest bearing trees produce a larger pro- 
portion of the most desirable and valuable sizes of fruits than the 
lowest producing trees. The most productive trees also bear the 
largest proportion of fruit of first, or Orchard, grade, so that they 
are more profitable from the standpoint of quality and size of fruits, 
in addition to being high producers. On the other hand, the lowest 
producing trees bear a much larger proportion of extremely small 
fruits and fruits of the Standard (or second) grade. 
Figure 5 is similar to figure 4, in that it shows the percentages of 
fruit of the different commercial sizes which were produced by the 
10 highest and the 10 lowest yielding trees in the performance- 
record plat, but in this diagram the figures are based on the number 
