68 
BULLETIN 813, TJ. S. DEPARTMENT OF AGRICULTURE. 
probably due to the closer habit of growth of those trees, which 
lessens the number of fruits knocked from the trees or marred and 
scratched by the movement of the branches by the wind. The more 
compact trees also protect their fruits from sunburn to a greater 
extent than those of a more open character. 
As shown by the last two columns in Table XII and graphically 
in figure 11, the fruit produced by the trees of the Eureka strain is 
more uniform in character than that borne on the trees of the other 
strains. The 7.68 per cent of variable fruit produced by the trees 
of the Eureka strain seems large, but the number is much less than 
was produced by the trees of the other strains, and if the minor forms 
and fluctuating variations were deducted this percentage would be 
very greatly reduced. 
77P/5TS 
/O 
2 /=&*/?- s//a/=>/t *s??Psi/sr 
JIO 
Fig. 11.— Diagram showing the percentages of variable fruits occurring on the trees of the different strains 
of Eureka lemons in the investigational performance-record plat during the 3-year period from July, 
1914, to June, 1917, inclusive. The proportions are based on the number of fruits produced. 
Table XII. — Production of fruit of the three different grades and of variable fruits picked 
from, the lemon trees of the several strains of the Eureka variety in the investigational 
performance-record plat during the 6-year period from July, 1911, to June, 1917, inclu- 
sive. 
[The data for variable fruits cover the 3-year period from July, 1914, to June, 1917, inclusive. The strains 
are ranked according to their proportion (by weight) of fruit of the Green grade.] 
Num- 
ber of 
trees. 
Description of trees. 
Percentage of weight of total 
crop. 
Variable fruits. 
Green 
grade. 
Tree-Ripe 
grade. 
Cull 
grade. 
Average 
yearly 
number 
per tree. 
Per cent. 
17 
Shade-Tree strain 
80.92 
76.54 
76.40 
71.56 
67.36 
66.20 
65.66 
62.87 
57.04 
12.43 
15.07 
15.54 
18.32 
21.32 
23.03 
23.04 
24.87 
34.35 
6.65 
8.39 
8.06 
10.13 
11.33 
10.77 
11.29 
12.26 
8.61 
99.84 
69.00 
68.77 
155. 33 
148. 53 
93.77 
95.68 
88.16 
428. 17 
15.90 
10 
10 
Lowest producing (irrespective of strain) 
17.38 
16.40 
2 
Dense- Productive strain 
12.39 
10 
10 
Highest producing (all Eureka strain) 
Small-Open strain 
9.50 
9.95 
117 
Entire plat 
9.67 
76 
7.68 
2 
50.15 
