BUD VARIATION IN THE MARSH GRAPEFRUIT. 



99 



Because, as already stated, it is almost impossible, on the basis of 

 performance records alone, to make an intelligent estimate of the 

 relative value of different trees in any group, except of those which 

 vary greatly in the amount of their production, no discussion of that 

 nature will be attempted here. The records of the individual trees 

 are presented to show the variations that occur between them. Con- 

 clusions of relative values are limited to comparisons of the various 

 strains and the groups of highest and lowest producing trees in the 

 two plats. 



POUNDS 

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Fig. 1.— Average annual total crop and the production by the two commercial grades from the individual 

 trees in the investigational performance-record plat A of Marsh grapefruit in a grove planted in 1898, 

 being a summary of data secured during the 6-year period, 1910 to 1915, inclusive. 



In order to show more clearly the relative variations in production 

 that occur in the crops from the individual trees, figures 1 and 2 are 

 presented, showing graphically the average total annual production 

 of each tree and the production of the two commercial grades. The 

 trees are ranked in these diagrams in the same order as in Table III. 

 While the average production of the 25 trees in plat A, shown in 

 figure 1, varies from 528.1 to 195.8 pounds, 17 of them, or 68 per 

 cent, are seen to be within the comparatively uniform range of 430.9 

 to 337 pounds. The five lowest producing trees m this plat are aU 

 of the Seedy strain. The trees in plat B, recorded in figure 2, are 

 younger than those in plat A, hence their average production is 

 much lower. Their range of variation is from 240.1 to 79.3 pounds. 



