BUD VARIATION IX THE MARSH GRAPEFRUIT. 
105 
four 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 
VAR/ABLE ERU/TS PEP CENT BY NUMBER 
3 UNPROPUCT/VE STRA/N 0.39 
S ALTERNATE'BEAR/NG STRA/N 0.44 
5 LOWEST PRODUC/NO 
S H/GHErST, PRODUC/NG . 
(all marsh strain) 
40 MARS/7 STRA/N 
0.46 
0.5 7 
0.64 
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-year period, 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. 
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. 
E/KE /f/£//EST PROPNC/NG TREES 
PER CENT OECROP BY V/E/CNT 
S/Z£S 
3/./ 
//2 
ri-r, t, 
2/.4 
/ZO 
36 
f/.O 
/4J 
80 
//4 
/3.3 
64 
/2./ 
W.3 
48 
S3 
E/YE LOWEST PPODUC/A/6 TREES 
PER CENT OE CROP BY WE/CNT 
7./ 32 8.8 
/2./ 24 2S.4 
GPADES 
48.9 E/RST 30.0 
461 SECOND 59.3 
H 6.8 CULL /6.2 
P2093IHP 
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- 
