1954 planting 1957 1958 1959 1960 Growth 









No . 



No . 



Av . 



No . 



Av . 



No . 



Av 



fi V • 



Mortality 



increase , 





Plot 



Are a 



trees 



tree s 



ht . 



trees 



ht . 



trees 



ht . 



1957-1960 



1959-1960 

























seasons 







AC Lc S 







r L . 





r L . 





r L . 



Pe r c en t 



Pe rc e n t 



1 





0.1 



36 



35 



0.90 



34 



1 .17 



32 



1 .39 



11.1 



54.4 



2 





.1 



53 



51 



.84 



47 



1 .11 



48 



1 .32 



9.4 



57 .1 



3 



(check) 



.1 



53 



53 



1 .14 



53 



1 .45 



53 



1 .71 







50.0 



4 





.1 



52 



44 



.97 



44 



1 .07 



36 



1 .34 



30 .7 



38 .1 



Spraying herbicide from aircraft probably would result in more even dosage 

 per acre than was obtained by hand spraying. This in turn might cause more 

 leader dieback and might not reach the brush foliage as effectively as hand 

 spraying. The results obtained by hand spraying in this test suggest that 

 little is to be gained by applying herbicides after planting under the condi- 

 tions outlined here. Site preparation suitable for planting could probably 

 be achieved more satisfactorily by spraying prior to planting, and possibly 

 burning, or by powered mechanical scarification. 



2 



