12 
BULLETIN 821, U. S. DEPARTMENT OE AGRICULTURE. 
good fruits, until the December picking, when a total of 9,320 mer- 
chantable lemons is recorded, as compared with no frozen ones. 
Table VI shows the estimated production by grades for an acre 
of Lisbon lemon trees (plat 2) during the calendar year 1913. These 
figures are calculated from the actual individual-tree performance 
records of ^ve selected trees in the plat. This orchard was not 
heated during the winter of 1912-13, but was partially protected by 
heaters in neighboring orchards. It was selected for comparison 
with plat 3 in an orchard of Eureka lemon trees which was not heated 
during that period. 
Table VI. — Total estimated production by grades from plat 2, 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 not heated during the winter of 1912-13 and was selected for comparison with plat 3 in an 
orchard of Eureka lemon trees which was not heated during that period. Plat 2 was partially pro- 
tected by heaters in neighboring orchards. The data from plat 3 arc presented in Table VII.] 
Classification. 
Date of picking. 
Total for 
Feb. 15. 
Apr. 4. 
May 27. 
June 24. 
Aug. 20. 
Nov. 17. 
year. 
Number of fruits: 
16, 700 
120 
33, 160 
3,340 
15,700 
4,400 
6,880 
2, 560 
10, 480 
0,080 
3,480 
1,860 
80, 400 
18,360 
Total merchantable fruit. 
16,820 
36, 500 
20, 100 
9,440 
16,560 
5,340 
101,760 
Cull grade 

54,220 
780 
72,640 
1,660 
7,360 
1,300 
1,260 
680 
2,180 
2,220 
2,360 
6 640 
MO, 020 
Total 
71,040 
109,920 
29, 120 
12,000 
19,420 
9,920 
251, 420 
Weight of fruits: 
Lbs. oz. 
4,235 
28 12 
Lbs. oz. 
8,621 4 
648 12 
Lbs. oz. 
4,081 4 
873 12 
Lbs. oz. 
1,742 8 
.512 8 
Lbs. oz. 
2,251 4 
1,038 12 
Lbs. oz. 
961 4 
328 12 
Lb", oz. 
21 892 8 
Tree- Ripe grade 
3', 431 4 
Total merchantable fruit . 
4,263 12 
9,270 
4,955 
2,2.55 
3,290 
1,290 
25,323 12 

5, 551 4 
108 12 
10,413 12 
240 
1,172 8 
143 12 
196 4 
93 12 
307 8 
333 12 
337 8 
920 
17,978 12 
Total 
9,815 
19,792 8 
6,367 8 
2,595 
3,691 4 
1,961 4 
44 2'^2 8 
A study of the figures in Table VI shows that a large percentage 
of the fruit in the February and April pickings was frozen. The 
small number of merchantable fruits recorded at the different pickings 
throughout the year in this plat is due to the fact that the trees were 
somewhat protected. This plat, like plat 1, had about returned to 
normal production at the close of the year. 
In Tables VII to XIV, inclusive, the estimated production is 
shown by grades for plats 3 to 10, inclusive, as described in Table II. 
