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 



