EFFECTS OF FREEZES ON CITRUS IX CALIFORNIA 



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Train, run by the College of Agriculture of the University that it 

 would be better to wait, whenever the damage had been at all severe, 

 until the extent of the damage became clearly defined, the majority of 

 the growers adopted this policy. 



The effect of early and late pruning was easily observed and. was 

 tested out by many growers. The following two instances may be 

 cited as definite experiments. In one orchard of old lemon trees a 



Fig. 14. Badly injured Eureka lemon tree, pruned February 1, 1913, 

 and photographed four and one-half months later, showing the dicing back 

 of large limbs after the first pruning. Such early pruned trees as this 

 made no better growth than unpruned trees and required a second pruning. 

 Photo by Tylor June 24, 1913 (compare fig. 13.) 



certain portion of the trees were cut back in February, and all wood 

 at that time thought to be dead was cut out. A check row, however, 

 was left, which was not pruned until summer. The cuts made during 

 February were in most places on wood that ultimately died. In this 

 case there was no apparent difference in amount of new growth 

 produced on the trees under the different treatments, but in the case 

 of the early pruning, a second cutting was necessary in order to 

 completely remove all the dead, frozen branches (figs. 13 and 14). 

 In an experiment, carried out by the Citrus Experiment Station 



