FROST PROTECTION TIST LEMON ORCHARDS. 



21 



Table XVII. — Perdentages of fruits by grades produced in the nonheated acre of Eureka 

 lemon trees, plat 3, as compared with the inadequately heated plat 5, and the efficiently 

 heated plat 7, during the calendar year 191.3. 



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



Tables VII, IX, and XL] 



Grade and condition. 



Date of jncking. 



Mar. 4. 



Apr. 2. 



May 20. 



June 24. 



Aug. 12. 



Sept. 13. 



Oct. 20. 



Dec. 12. 



Green grade: 



Not heated 



Partially heated. . 

 Heated 



9.37 

 26.52 

 43.78 



.36 

 45. 24 

 50.02 



9.73 

 71.76 

 93.80 





 

 



90.27 



28.24 



6.20 



16.64 

 25.96 

 44.86 



7.71 

 45.40 

 42.94 



24.35 



71.36 

 87.80 



.65 

 11.43 

 12.20 



75.0 

 17.20 

 



30.92 

 38.96 

 43.85 



16.98 

 27.86 

 26. 10 



47.90 

 66.82 

 69.95 



10.31 

 28.07 

 29.93 



41.79 

 5.11 



.12 



32.50 

 40.56 

 48.54 



12.50 

 52. 52 

 45.48 



45.0 

 93. 08 

 94.02 



2.50 

 5.79 

 5.98 



52.50 

 1.12 

 



36. 94 

 30.20 

 32.92 



14.44 

 49.41 

 56.94 



51.38 

 79.61 

 89.86 



5.56 

 20.39 

 10.14 



43.05 

 

 



(>) 



25.41 



30.0 



0) 



58.20 



62.38 



(I) 



83.61 



92.38 



(') 



11.47 

 7.14 



(1) 

 4.92 

 .48 



39.19 

 10.03 

 18.69 



17.82 

 44.44 

 42.35 



.57.01 

 54.47 

 01.04 



21.37 

 45. 56 

 38.96 



21.62 

 

 



(0 

 92.17 

 61. 13 



Tree-Ripe grade: 



Not heated 



Partially heated. . 

 Heated... 



0) 

 3.19 

 26. 73 



Merchantable fruit: 



Not heated 



Partially heated. . 

 Heated 



0) 

 95. 36 



87.86 



Cull grade: 



Not heated 



Partially heated. . 

 Heated... . 



0) 

 4.64 

 12.14 



Frozen grade: 



Not heated 



Partially heated.. 

 Heated 





 







1 No pickings were made from the nonheated plat 3 in September or December. 



A study of figure 1 1 

 shows that with one 

 exception the curves 

 of merchantable fruit 

 in both the inade- 

 quately heated and 

 the efficiently heated 

 plats are considerably 

 higher than the curve 

 of the same class of 

 fruit in the nonheated 

 orchard. The diagram 

 also presents strikingly 

 the differences in per- 

 centages of merchant- 

 able fruits in the par- 

 tially heated and effi- 

 ciently heated or- 

 chards. With the 

 exception of the pick- 

 ing in December, the 

 percentages of mer- 

 chantable fruit in the 

 partially heated or- 

 chard are found to be 

 somewhat lower than 

 the same class of fruit 

 in the well-heated one. 



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1 



Fig. 10.— Diagram prepared from the figures presented in Table XVI, 

 showing the percentages of merchantable and frozen fruits produced 

 on the heated acre of Lisbon lemon trees, plat 6, as compared with 

 the nonheated acre, plat 8, during the calendar year 1913. 



