70 



BULLETIN 813, U. S. DEPARTMENT OF AGRICULTURE. 



to June, 1917, inclusive, have been considered in this study. During 

 this period pickings were made every month except in February, 

 1917, when interfering rains made it impossible to do the work at 

 the scheduled time. Inasmuch as it would be unfair to consider the 

 fruit picked in March, 1917, as all produced during one month, it 

 was decided that for the purpose of this comparison of seasonable 

 production the crops picked at that time should be arbitrarily halved 

 and credited to February and March equally. 



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Fig. 12.— Diagram showing the percentages of the total yields of Green-grade fruits and of Tree-Ripe 

 fruits, by weight, produced each month by the trees of the various strains of Eureka lemons in the inves- 

 tigational performance-record plat during the 3-year period from July, 1914, to June, 1917, inclusive. 

 The strains are arranged from left to right in the order of their rank for total production, as shown in 

 Table X. 



The first part of Table XIII shows the average individual-tree 

 production of fruit of the Green and Tree-Ripe grades for each month, 

 expressed in pounds. The comparative behavior of each strain in 

 this respect is best studied by expressing the monthly yields in per- 

 centages of the annual crop, and these data are given in the second 

 part of the table, and are shown graphically in figures 12 and 13. 



