16 
BTJLLETIIT 821, TJ. S. DEPAETMEl^T OF AGEICULTTJEE. 
Table XIII.— ToiaZ estimated production, hy^ grades, from plat 9, 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 ten Lisbon lemon trees. This 
plat was heated during the winter of 1912-13 and was selected for comparison with plat 10 in an orchard 
of Lisbon lemon trees which was not heated during that period. The data from plat 10 are presented 
in Table XIV.] 
Classification. 
Date of picking. 
Total for 
Mar. 12. 
Apr. 3. 
May 13. 
June 25. 
Aug. 12. 
Sept.l3. 
Oct. 25. 
Dec. 12. 
year. 
Number of fruits: 
Green grade 
64, 440 
80, 100 
10, 270 
2,310 
23,080 
2,030 
19,580 
21, 920 
4,900 
6,400 
2,950 
3,620 
220 
1,050 
3,320 
200 
128, 760 
Tree- Ripe grade 
117,630 
Total merchantable 
fruit 
144, 540 
12, 580 
25, 110 
41, 500 
11,300 
6,570 
1,270 
3,520 
246,390 
Cull grade 

8,380 
890 
60 
2,630 
10 
1,870 
40 
640 

600 

2,310 

70 

9,070 
8,490 
Frozen grade 
Total 
152, 920 
13,530 
27,750 
43,410 
11, 940 
7,230 
3,580 
3,590 
253 950 
Weight of fruits: 
Lbs. oz. 
16,752 8 
15,280 10 
Lbs. oz. 
2,513 2 
440 
Lbs. oz. 
5,744 6 
449 6 
Lbs. oz. 
4,935 
4,303 12 
Lbs. oz. 
1,170 
1,246 14 
Lbs. oz. 
621 4 
575 10 
Lbs. oz. 
57 8 
157 8 
Lbs. oz. 
868 12 
50 10 
Lbs. oz. 
32,662 8 
22,504 6 
Tree- Ripe grade 
Total merchantable 
fruit. 
32,033 2 
2,953 2 
6,193 12 
9,238 12 
2,416 14 
1,196 14 
215 
919 6 
55.166 14 

924 6 
120 10 
8 12 
412 8 
2 8 
222 8 
5 10 
93 2 

84 6 

120 

10 

1,063 2 
941 4 
Frozen grade 
Total 
32,957 8 
3,082 8 
6,608 12 
9,466 14 
2,510 
1,281 4 
335 
929 6 
57,171 4 
Table XIV. — Total estimated production, by grades, from plat 10, an acre of Lisbon 
lemon trees, for each picking during the calendar year 1913. 
[The data in this plat were computed from the indiA-idual-tree records of ten Lisbon lemon trees. This 
plat was not heated diulng the winter of 1912-13 and was selected for comparison ■uith plat 9 in an 
orchard of Lisbon lemon trees which was heated during that period. The data from plat 9 are presented 
in Table XIII.] 
Classification. 
Date of picking. 
Total for 
Mar. 12. 
May 13. 
Jtine 26. 
Dec. 1. 
year. 
Number of fruits: 
Green grade 
3,470 
4,460 
160 
10 
450 
1,510 
3,090 
170 
7,170 
Tree-Ripe grade 
6,150 
Total merchantable fruit 
7,930 
170 
1,960 
3,260 
13,320 

155, 230 
90 

120 
40 
80 

290 
Frozen grade 
155, 270 
Total 
163, 160 
260 
2,120 
3,340 
168, 880 
Weight of fruits: 
Green grade 
Lbs. oz. 
810 10 
782 8 
Lbs. oz. 
35 
1 14 
Lbs. oz. 
107 8 
251 14 
Lbs. oz. 
865 
27 8 
Lbs. oz. 
1,818 2 
Tree-Ripe grade .... 
1,063 12 
Total merchantable fruit 
1,593 2 
36 14 
359 6 
892 8 
2,881 14 
Cull grade 

14,475 10 
13 12 

11 14 
4 6 
9 6 

35 
Frozen grade 
14, 480 
Total 
16,068 12 
50 10 
375 10 
901 14 
17,396 14 
In studying the figures presented in the accompanying tables it will 
be seen that in all the nonheated plats large numbers of frozen 
fruits were taken from the trees during the first six months following 
