EFFECTS OF FREEZES ON CITRUS IN CALIFORNIA 319 



After sorting, the fruits of each grade were counted and weighed. 

 The percentage of each of these four grades of fruit produced on each 

 plot is given in the following table, and is self-explanatory. 



The average cost of heating in the orchards where the plots were 

 located has also been secured from records kept by the growers for 

 this purpose. 



TABLE 15 



PERCENTAGES OF DIFFERENT GRADES OF FRUIT ON EACH PLOT. 

 Figures based on iveight of fruit in the crop of the year. 



LISBONS 

 Heated Plots Unheated Plots 



61.4% Green 19.2% 



26.5%.. Tree Ripe .... 4.8% 



Plot 4 10.6%. Frozen 74.3% Plot 1 



1-6%... Culls 1.6% 



74.4% Green 31.3% 



17.1% Tree Ripe .... 1.6% 



Plot 6 6.5% Frozen ..66.8% Plot 8 



2.1%. Culls 0.2% 



57.2% Green .10.5% 



39.4%. Tree Ripe 6.1% 



Plot 9 1.6%. .Frozen 83.2% Plot 10 



1.9% Culls 0.2% 



Average of the three series. 



64.3% Green 20.4% 



27.7% .Tree Ripe 4.2% 



6.2%. ..Frozen 74.8% 



1.9%. Culls 0.7% 



EUREKAS 



Plot 7 Plot 5 Plot 3 



Well heated Poorly heated Unheated 



Green 50.7% 39.9% 32.3% 



Tree Ripe. 43.2% 42.4% 7.3% 



Frozen 2.6% 14.1% 58.0% 



Culls... 3.5% 3.6% 2.4% 



UNHEATED EUREKAS vs UNHEATED LISBONS 

 Unheated Eurekas Unheated Lisbons 



32.3%. ..Green.. 49.5% 



7.3% .Tree Ripe 7.8% 



PlotS 58.0% .Frozen .40.7% Plot 2 



2.4%... ..Culls . 2.1% 



Both plot 3 and plot 2 were partially protected by heaters in neighboring groves 



