104 
BULLETIN" 697, U. S. DEPARTMENT OF AGRICULTURE. 
Figures 7 and 8 show the average number of seeds per fruit pro- 
duced by trees of the different strains in the performance-record plats. 
/ ROUGH STRA/H 
/9 MARSH STRAIN 
S HIGHEST, PRODL/C/NG , 
(ALL MARSH STRA/MJ 
/ SMOOTH SEEDY STPA//V 48. 7 WM 
AVERAGE M/WER Of SEEDS PER fftU/T 
2.2M 
2.6 ■ 
2.8m 
S LOWEST PPODUC/NG S/.S I 
4 POUG/i SEEDY STRA/N 52.21 
P209I3HP 
Fig. 7. — Average number of seeds per fruit found on trees of various strains of Marsh grapefruit in the 
investigational performance-record plat A in a grove planted in 1898, being a summary of the data 
secured during the 6-year period, 1910 to 1915, inclusive. 
These data indicate that the most productive and most desiraoie 
strains and groups of trees bear fruit with the least number of seed. 
The high seed con- 
tent of the fruits of 
the seedy strains is 
strikingly shown in 
figure 7. 
Figures 9 and 10 
show the percentages 
of fruits of a variable 
character found in 
the total crops of the 
trees of the various 
strains in the per- 
formance-record plats, 
minor importance. 
S ff/GNEST PRODUCING , 
(ALL MARSH STPA/N) 
40 MARS/1 STRAW 
AVERAGE NUMBER Or JTTDS PTR TPU/T 
3.2 
3.3 
3 UNPRODUCT/VF STRA/N 3.4 
S 10 WES T PPOPUC/NG 3. S 
S ALTERNATE BfAR/NG STRA/N 3.8 
P20920HP 
Fig. 8.— Average number of seeds per fruit found on trees of various 
strains of 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. 
Practically all of these fruits were forms of 
Figures 1 1 and 
12 show the aver- 
age production by 
weight of the difTer- 
ent commercial 
sizes and grades 
from the five high- 
est producing trees 
in each of the per- 
formance-record 
plats in comparison 
with the corre- 
sponding yields of the Ryo lowest producing trees of these plats, 
respectively. These summaries are for the 6-year period, 1910 to 
1915, inclusive, except that the data relating to culls cover only the 
WAR/ABLE rfi(J/TS P/SR CBNT BY NUMBER 
/ SMOOTH SEEDY STRA/N 0.20 E» 
/ ROUG/i STRA/N 
/$ MARSH STRA/N 
S /i/GNEST PPODUC/NG . 
(all ma*jh stxa/h/ 
5 LOWEST PPOPUC/NG 
4 ROUG// SEEDY STPA/N 
Pig 
P20925HP 
-Percentage of variable fruits found on trees of various 
strains of the Marsh grapefruit in the investigational performance- 
record plat A in a grove planted in 189S, being a summary of 
the data secured during the 4-year period, 1912 to 1915, inclusive. 
