BUD VARIATION IN" THE WASHINGTON NAVEL ORANGE. 69 



season after the increase in 1911. Contrasted with this record is the 

 annual average yield of 100.8 pounds produced by tree 7: 1-68-13, 

 listed in rank 136 in the same tables. This tree also shows a fairly 

 uniform crop throughout the periods, but with a reduced yield during 

 the last two seasons. 



It will be noticed that while the weight of the average crop of the 

 tree ranked No. 11 is practically three times that of the other tree, 

 the average number of fruits produced is only slightly more than 

 twice as many. A determination of the average weight per fruit 

 gives comparative results of 0.5 and 0.35 pound. The most desirable 

 commercial sizes of the Washington Navel oranges are those which 

 pack 126, 150, 176, and 200 to the box, the highest prices usually 

 being received for the 126 and 150 sizes. A fruit weighing 0.5 pound 

 is generally of the 150 size, while 'one weighing 0.35 pound is about 

 size 200. An inspection of the number of fruits of the various sizes 

 borne by the two trees shows that the tree ranked No. 11 had more 

 of the 150 size than of any other, while the other tree produced the 

 largest number of the 200 size. Comparing the number of fruits 

 of the 126, 150, 176, and 200 sizes produced by the two trees, we find 

 that the highest producing tree bore approximately 63 per cent of 

 these desirable sizes, while the other tree had only 45 per cent of the 

 same sizes. 



A comparison of the relative proportions of high-grade fruit pro- 

 duced by these trees shows again the superior value of the high- 

 producing tree, for it had 82.6 per cent of the Orchard grade, or first- 

 grade, fruit, while the other tree had only 78.2 per cent of this grade. 

 The number of variable fruits found on these trees was very small, 

 being only 0.43 per cent of the total number of fruits in the case of 

 the high-producing tree and 0.42 per cent on the other tree. 



It will be seen that this and similar high-producing trees are of 

 superior value, not only on account of their high production, but 

 also because of their large proportion of fruit of the most desirable 

 sizes and their high percentage of first-grade fruit. These conditions 

 also make such trees of special value to the propagator as sources of 

 bud wood for nursery propagation or for rebudding older trees of 

 undesirable strains. 



In Table IV are given the average total crops of the 481 trees in the 

 record plats on which data have been secured for four successive 

 years, and in Table V are presented the annual detailed performance 

 records of 64 representative trees from this list. These tables are 

 similar in character to Tables II and III, but they present data for 

 a 4-year instead of a 6-year period. The trees listed in Table V were 

 chosen on the same basis as those in Table III, but in order to reduce 

 the length of the table it was necessary to omit some of the trees of 

 the Thomson, Goldeu Nugget, and Yellow Washington strains. 



