BUB VAEIATION IN THE MARSH GEAPEPEUIT. 



105 



foui' years, 1912 to 1915, inclusive. Figure 11 shows that the heaviest 

 producing trees in plat A also bore the largest proportion of fruit of 

 the most desirable sizes and of the Ivory- White (or first) grade. The 

 data in figure 12 show 



vA/?/ASi£r rRu/rs P£:ff cr//r by numbcp 



U^PROPLfCT/V£: STRA/N 

 ALT£:RNAT£'-BfAR/NQ STRA/N 

 Lowers T PRODUC/NG 



3 

 S 

 5 

 S 



that in plat B there 

 was very little differ- 

 ence between the 

 heaviest and lowest 

 producing trees with 

 respect to these same 

 characters. 



In figures 13 and 14 

 are shown the average 

 number of fruits of the 

 various commercial 

 sizes produced during 

 the 6-yearperiod, 1910 



to 1915, inclusive, by the five highest yielding and the five lowest 

 yielding trees in the two performance-record plats. This production 

 is expressed in percentages of a packed box for the fruit of each size. 



WGfi£:ST. PRODUC/NG , 



(all marsm srffAwJ 



40 MARS^ STRA/N 



Fig. 10. — Percentage of variable fruits found on trees of various 

 strains of the Marsh grapefruit in the investigational performance- 

 record plat B in a grove planted in the fall of 1903, being a 

 summary of the data secured during the 4-year period, 1912 to 1915, 

 inclusive. 



p^p c^A/r orcpcp by wm/ir 



3/./ 



/2.0 



MJ 



/3.3 



/0.3 



7./ 



/3./ 



S/Z£S 

 //2 

 S6 

 80 

 64 

 48 

 32 



f/y£ LOW^T PROPUC/m rpffs 

 Pfp cfNT or CROP BY wr/s//r 



2/.4 



//.o 



//.4 

 /2./ 

 9.S 

 8.8 



24 2S.4 

 CRAD£S 



48.9 F/RST 30.0 

 467 SfCOW S9.3 



6.8 



CULL /6.2 



Fig. 11. — Average annual production by commercial sizes and grades from the five highest and the five 

 lowest producing Marsh grapefruit trees, irrespective of strain, in the investigational performance- 

 record plat A in a grove planted in 1898. The figures indicate the proportion. of each size and grade to 

 the total crop, calculated from their weights during the 6-year period, 1910 to 1915, inclusive, except that 

 the datarelating to culls cover only the 4-year period, 1912 to 1915, inclusive. 



The yield on the acre basis is figured at the rate of production of both 

 the highest and lowest yielding trees and the actual values of those 

 possible yields are given. The figures show that the highest produc- 



