FROST PROTECTION IN" LEMON ORCHARDS. 
13 
Table VII. — Total estimated production by grades from plat 3, an acre of Eureka lemon 
trees, for each picking during the calendar year 1913. 
(The data in this plat were computed from the individual-tree records of ten Eureka lemon trees. This 
plat was not heated during the winter of 1912-13 and was selected for comparison with plat 2 in an 
orchard of Lisbon lemon trees which was not heated during that period and with plats 5 and 7 in 
orchards of Eureka lemon trees which were heated during that same period. Plat 3 was partially pro- 
tected bv heaters in neighboring orchards. The data from plat 2 are presented in Table VI, from plat 
5 in Table IX, and from plat 7 in Table XI.] 
Classification. 
Date of 
picking. 
Total for 
Feb. 15. 
Apr. 5. 
May 27. 
June 21. 
Aug. 20. 
Nov. 17. 
year. 
Number of fruits: 
10,330 
400 
6,630 
3,070 
1,620 
890 
390 
150 
1,330 
520 
4,750 
2,160 
25,050 
7,190 
Total raerchantaT)le fruit . . 
10, 730 
9,700 
2,510 
540 
1,850 
6,910 
32,240 
Cull grade 

99, 510 
260 
29,880 
540 
2, 190 
30 
030 
200 
1,550 
2,590 
2,620 
3,620 
Frozen grade 
13(i 380 
Total 
110,240 
39,840 
5,240 
1,200 
3,600 
12, 120 
172, 240 
Weight of fruits: 
Green grade 
Tree-Ripe grade 
Lbs. oz. 
2,519 6 
91 4 
Lbs. oz. 
1,769 6 
682 8 
Lbs. oz. 
431 14 
200 10 
Lbs. oz. 
106 4 
29 6 
Lbs. oz. 
301 4 
85 10 
Lbs. oz. 
1,331 14 
376 4 
Lbs. oz. 
6,460 
1 465 10 
Total merchantablefruit. . 
2,610 10 
2,451 14 
632 8 
135 10 
386 14 
1,708 2 
7,925 10 
Cull "rado 

6,156 14 
41 14 
4,565 10 
115 
31S 2 
5 10 
76 4 
22 8 
196 4 
293 12 
290 
478 12 
11,603 2 
Total 
8,767 8 
7,059 6 
1,065 10 
217 8 
605 10 
2,291 14 
20,007 8 
T.VBLE VIII. — Total estimated production by grades from -plat 4, an acre of Lisbon lemon 
trees, for each picking during the calendar year 1913. 
[The data in this plat were computed from the individual-tree records of five Lisbon lemon trees. This 
plat was heated during the winter of 1912-13 and was selected for comparison with plat 1 in an orchard of 
Lisbon lemon trees, which was not heated during that period. The data from plat 1 are presented in 
Table V.l 
Classification. 
Date of picking. 
Total 
for 
year. 
Mar. 3. 
Apr. 1. 
May 19. 
June 23. 
Aug. 11. 
Sept.l2. 
Oct. 26. 
Dec. 12. 
Number of fruits: 
52,620 
39,840 
9,420 
3,020 
17,980 
4,840 
8,300 
3,160 
2,740 
4,420 
1,080 
2,340 
1,520 
700 
11,360 
80 
105,020 
58,400 
Tree-Ripe grade 
Total merchantable 
fruit 
92,460 
12,440 
22,820 
11,460 
7, 160 
3,420 
2,220 
11, 440 
163, 420 
Cull grade . . 

28,960 
1,260 
1.980 
2,600 
1,320 
320 
280 
580 
40 
160 
40 
580 



5 500 
Frozen grade 
32' 620 
Total. 
121, 420 
15, 680 
26,740 
12,060 
7,780 
3,620 
2,800 
11, 440 
201 540 
Weight of fruits: 
Lbs. oz. 
13,132 8 
7, 848 12 
Lbs. oz. 
2,277 8 
542 8 
Lbs. oz. 
2,543 12 
982 8 
Lbs. oz. 
2, 148 12 
666 4 
Lbs. oz. 
681 4 
863 12 
Lbs. oz. 
227 8 
373 12 
Lbs. oz.lLbs. oz. 
400 0,3,051 4 
102 8| 20 
Lbs. oz. 
24,462 8 
Tree-Ripe grade 
11,400 
Total merchantable 
fruit 
20,981 4 
2,820 
3,526 4 
2,815 
1,545 
601 4 
502 8 3,071 4 
35,862 8 
Cull grade 

4,045 
143 12 
217 8 
361 4 
223 12 
47 8 
53 12 
70 
6 4 
18 12 
6 4 
50 oj 

691 4 
Frozen grade 
4 552 8 
Total 
25,026 4 
3,181 4 
4,111 4 
2,916 4 
1,621 4 
626 4 
552 83-071 4 
41, 106 4 
