30 
BULLETIN 623, U. S, DEPARTMENT OF AGRICULTURE. 
The average total crop of each of the trees from which performance 
records have been obtained for six successive seasons is shown in 
Table II. The percentage of Orchard (or first grade) fruit produced 
by each tree is also expressed, being figured on the basis of the 
weight of the crops, and the proportion of variable fruits, by num- 
ber, is shown. When securing performance records, late bloom fruit 
and split fruit have been recorded, but such fruits have not been 
included with the variable fruits. In Table II the trees are ranked 
arbitrarily according to their average total crops, by weight, without 
regard to the grade or quality of the fruit or its miiformity. Hence, 
the position of any given tree in this table is not necessarily a true 
index of what its relative position would be if the classification 
were made on the basis of the commercial value of its fruit. The 
great number of characteristics of trees and fruit which must neces- 
sarily be taken into consideration in attempting a classification of 
this sort on the basis of the quality of the fruit and the desirability 
of the individual trees renders such a system inaccurate and unsat- 
isfactory when dealing with such a large number of individuals as 
are represented here. On this account the basis of average annual 
yield was adopted. 
Table II. — Summarized statement of the average annual production of 151 Washington 
Navel orange trees for ivhich detailed performance records ivere obtained for six years, 
1910 to 1915, inclusive. 
[Detailed performance records of the trees marked with an asterisk (*) are shown in Table III. Trees 
marked with a dagger (f) are of the Unproductive strain; all others are of the Washington strain.] 
Tree desig- 
nation. 
Annual crop production, 
6-year average. 
Rank. 
Tree desig- 
nation. 
Annual crop production, 
6-year average. 
Rank. 
Weight. 
Num- 
ber. 
Or- 
chard 
grade. 
Vari- 
able 
fruits. 
Weight. 
Num- 
ber. 
Or- 
chard 
grade. 
Vari- 
able 
fruits. 
2.'.'.'.'.'. 
3 
4 
5 
6 
7 
8 
9 
*3-14-27 
*3-12-28 
3-13-29 
*3-14-26 
3-12-29 
*3-13-28 
*3-12-30 
*3-14-25 
4-27-16 
*7:2-25- 1 
*7:2-37- 1 
10:1-29- 8 
4-28-14 
*10:l-28- 9 
7:2-32- 3 
4-26-13 
7:2-31- 1 
10:1-32- 6 
*4-23- 3 
10:1-29- 2 
7:2-25- 3 
4-18-19 
10:1-31- 7 
10:1-31- 5 
3-13- 4 
*10:1-31- 4 
10:1-32-4 
10:1-31-10 
10:1-32-10 
Pounds. 
394.0 
379.6 
354.6 
350.2 
343.4 
341.3 
325. 2 
322.7 
322.7 
311.2 
298.8 
291.7 
291.3 
289.1 
282.6 
282.0 
281.1 
280.6 
280.5 
277.9 
276.4 
275.7 
272.5 
272.0 
272.0 
269.0 
268.4 
266.2 
263.2 
771 
878 
721 
711 
709 
744 
643 
613 
655 
654 
603 
591 
643 
752 
632 
601 
614 
606 
564 
658 
588 
633 
610 
544 
553 
561 
553 
580 
557 
P. cl. 
81.9 
78.2 
80.0 
85.7 
80.9 
81.2 
77.2 
85.8 
81.2 
84.7 
82.6 
81.6 
83.7 
83.9 
78.7 
84.2 
83.0 
85.4 
83.6 
79.4 
83.6 
79.2 
81.6 
85.7 
82.6 
84.4 
83.8 
82.0 
83.4 
P.ct. 
0.54 
.91 
1.28 
.98 
.89 
.81 
.98 
.78 
.76 
.84 
.46 
1.02 
.58 
.47 
.44 
1.08 
.29 
.38 
.83 
.68 
.31 
.27 
.70 
.55 
.60 
.62 
.63 
.86 
.45 
30 
31 
32 
33 
34 
35 
36 
37 
38 
10:1-30- 9 
*10:l-30- 3 
3-17- 4 
10:1-29-10 
6:1-58- i 
10:1-32- 9 
3-14- 4 
10:1-29- 3 
. *10:l-28- 8 
10:1-29- 6 
10:1-28- 6 
10:1-32- 3 
7:1-53- 1 
10:1-30- 7 
10:1-28- 5 
10:1-29- 7 
10:1-29- 4 
10:1-31- 6 
• 4-32- 4 
*10:l-28-4 
4-23- 2 
10:1-32- 7 
7:2-31- 3 
7:2-30- 4 
10:1-29-11 
10:1-30- 5 
10:1-30- 2 
4-18-18 
*4-30- 6 
Pounds. 
262.9 
261.3 
258.0 
256.8 
256.7 
255.4 
253.0 
251.9 
249. 3 
248.7 
248.1 
247.9 
247.4 
246.1 
244.9 
244.5 
242.4 
242.4 
240.7 
240.3 
239.3 
236.6 
235.8 
233.8 
233.3 
232.9 
232.7 
230.6 
229.8 
525 
568 
560 
568 
623 
566 
504 
528 
575 
498 
518 
516 
533 
505 
519 
549 
466 
500 
532 
515 
479 
501 
508 
485 
584 
427 
509 
516 
452 
P. ct. 
84-6 
87.0 
82.8 
85.3 
85.4 
84.0 
85.8 
84.2 
82.6 
82.2 
85.2 
85.4 
83.8 
80.8 
87.8 
85.4 
83.1 
86.4 
80.8 
85.0 
84.0 
81.0 
80.8 
84.4 
86.5 
87.2 
84.8 
82.0 
82.3 
P. ct. 
2.48 
.35 
.57 
.44 
.40 
.18 
1.93 
.76 
.52 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
39...... 
40 
41 
42 
43 
44 
45 
46 
47 
48 
49 
50 
51 
52 
53 
54 
55 
56 
57 
58 
.50 
1.06 
.45 
.75 
.85 
1.02 
.87 
1.57 
.86 
1.03 
1.03 
.52 
.96 
.85 
.52 
.51 
1.17 
2.02 
.87 
2.39 
