6. Fall planting of species mixtures presents special dilemmas. Because of the 

 interaction of species and date within the fall planting period, one cannot expect a 

 given planting date to provide good conditions for all species in a mixture. A mixture 

 of spruce and larch, for instance, would have to be planted in two separate operations 

 to provide reasonable survival of both species. Spring planting would minimize such 

 problems . 



7. Under the conditions of this study, restrictions against planting after June 1 

 seem inappropriate, except for western larch. For Douglas-fir, grand fir, and F.ngelmann 

 spruce, spring planting of stock stored as long as 11 weeks and planted as late as 



June 19 gave survival results equal to or slightly less than earlier spring plantings; 

 however, western larch was particularly sensitive to late spring planting, especially 

 on the drier sites. This sensitivity probably resulted largely from the effect of 

 storing on larch, a species that tends to break bud and commence growth under storage 

 conditions that maintain physiological quiescence in the other species studied. 



8. When planting must be done during times that have been shown to be less 

 favorable than others, planting rates should be adjusted (if possible) to help provide 

 plantations of desired density. 



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