22 



BUKLETIlSr 821, U. S. DEPAKTMENT OF AGRICULTURE. 



Table XVIII. — Percentages of fruits by grades produced in the nonheated acre of Lisbon 

 lemon trees, plat 10, as compared with the heated plat 9, during the calendar year 1913. 



[These percentages are computed from the total number of lemons produced by these plats, as shown in 



Tables XIII and XIV.] 



Grade and condition. 



Date of picking. 



Mar. 12. 



Apr. 3. 



May 13. 



June 25. 



Aug. 12. 



Sept. 13. 



Oct. 25. 



Dec. 12. 



Green grade: 



Not heated 



Heated 



2.13 

 42.14 



2.73 

 52.38 



75.91 



(1) 

 17.07 



61.54 

 83.17 



3.85 

 7.32 



21.23 

 45. 11 



71.23 

 50.50 



(1) 

 41.04 



(1) 

 53.61 



0) 

 40.80 



0) 

 50.07 



(1) 

 6.15 



29.33 



92. 51 



92.48 



Tree-Ripe grade: 



Not' heated 



Heated 



5.09 

 5.57 







Merchantable fruit: 

 Not heated 



4.86 

 94.52 



n 



92.98 



65.39 

 90.49 



92.46 

 95.61 



(1) 

 94.65 



0) 

 90.87 



C) 



35.48 



97.60 

 98.05 







Cull grade: 



Not heated 



Heated 





 



95.14 

 5.48 



0) 

 6.58 



(1) 

 .44 



34.61 

 9.48 





 .04 



5.66 

 4.31 



1.89 

 .09 



(1) 

 5.36 



0) 

 



G) 

 9.13 



(1) 

 



(1) 

 64.53 



(I) 

 



2.40 

 1.95 



Frozen grade: 



Not heated 



Heated 





 







1 The bulk of the fruits in the nonheated plat were frozen and were removed at the March picking, 

 fruits were taken from the trees during April, August, and September. 



No 



^/>/f, /tf/iy y(//f£- /tt/a. sr/'r 



Fig. 11. — Diagram prepared from the figures presented in Table 

 XVII, showing the percentages of merchantable and frozen 

 fruits produced on the nonheated acre of Eureka lemon trees, 

 plat 3, as compared with the inadequately heated acre, plat 5, and 

 the efficiently heated acre, plat 7, during the calendar year 1913 . 



Table XVIII gives 

 the percentages of 

 fruits by grades for 

 each picking during the 

 calendar year 1913 in 

 the nonheated plat 10, 

 an acre of Lisbon lemon 

 trees, as compared with 

 plat 9, an acre of heated 

 trees. The percentages 

 of frozen and mer- 

 chantable fruits in 

 these plats are shown 

 in figure 12. 



LESSONS TAUGHT BY 

 THE INVESTIGATIONS 

 IN 1913. 



The data presented in 

 this bulletin show that 

 in the lemon orchards 

 under investigation in 

 the Corona district of 

 California which were 

 protected with a suf- 

 ficient number of heat- 

 ers during the freeze of 



