BUD VARIATION IN THE EUREKA LEMON. 
67 
in the plat, 35 were above this average and 41 below it, as shown in 
Table VI. The limits of the average individual-tree production 
within the strain were 338.24 pounds and 165.86 pounds, being 
108.21 pounds (or 47.1 per cent) above the mean and 64.17 pounds 
(or 27.9 per cent) below it, respectively. In each of the other strains 
represented by 10 or more individuals, the individual-tree variations 
are also considerably greater above the mean than below it. 
Table XI. — Average annual crop of the individual lemon trees of several of the important 
strains found in the investigational performance-record plat of the Eureka variety, ranked 
according to the weight of their average total crops, for the 6-year period from July, 1911, 
to June, 1917, inclusive. 
<8 
Description of trees. 
Average annual production per tree. 
Total crop. 
Green grade. 
Tree-Ripe grade. 
Cull grade. 
Pounds. 
Num- 
ber. 
Pounds. 
Num- 
ber. 
Pounds. 
Num- 
ber. 
Pounds. 
Num- 
ber. 
10 
Highest producing (all 
299. 45 
230. 03 
217.55 
200. 39 
179. 86 
153. 72 
144. 79 
96.09 
89.44 
1,341.83 
1.051.88 
980. 83 
902. 91 
808. 88 
721. 25 
597. 33 
405. 00 
379. 42 
201. 71 
144. 63 
155. 67 
131. 58 
119. 07 
87.69 
117.17 
73.42 
68.46 
754. 00 
541. 58 
576.83 
490. 16 
445. 68 
328. 58 
426. 93 
266. 30 
250. 25 
63.83 
57.20 
39.85 
46.17 
41.43 
52.80 
18.00 
14.93 
13.48 
292. 65 
263. 29 
183. 75 
212. 07 
188. 70 
264. 50 
79.47 
66.82 
60.83 
33.92 
28.20 
22.03 
22.63 
19.36 
13.23 
9.62 
7.74 
7.50 
295. 18 
76 
247. 01 
2 
117 
Dense-Productive strain... 
220. 25 
200. 68 
10 
Small-Open strain * 
174. 50 
?, 
128. 17 
17 
Shade-Tree strain 
90.93 
10 
10 
Dense-Unproductive strain 
Lowest producing (irre- 
spective of strain) 
71.88 
68.33 
Table XII shows the percentage of fruit of the three commercial 
picking grades produced by the trees of the various Eureka strains, 
together with the average number and percentage of variable fruits 
recorded in each strain. The strains are here listed in the order of 
their rank by percentages of fruit of the Green grade produced per 
tree. The Shade-Tree, Dense-Unproductive, and Dense-Productive 
strains rank considerably above the others under this classification. 
However, it should be remembered that while in general fruit of the 
Green grade is superior to that of the Tree-Ripe grade, the fruit of 
the three strains just mentioned is much inferior in texture, thickness 
of skin, and other characteristics to that of the Eureka strain; hence, 
the superiority which would appear to be indicated by a study of 
this table alone is entirely lost when consideration is given to the 
character of the fruit itself. 
While the trees of the Small-Open strain are shown to have pro- 
duced a slightly higher percentage of Green-grade fruit than the 
trees of the Eureka strain, the actual production of the trees of the 
Small-Open strain is so much less than that of those of the Eureka 
strain that the inferiority of that strain is very apparent. The 
decreased percentage of Cull-grade fruit produced by the trees of the 
Shade-Tree, Dense-Unproductive, and Dense-Productive strains is 
