

Percent of 





?9;nplg tr??? 



Scars, basal and bole 



54 



Broken top 



31 



Bole splintered 



1 



Leaning 



6 



Total trees damaged 



59 



Oth^r defept 





Rots, heart or butt, cat face 



8 



Forked, bayonet top, no leader 



21 



Sweep, crook 



7 



Other defect 



2 



Total trees with defect 



29 



Regeneration on recently logged area 



A succession of four poor seed years has limited the establishment of 

 seedlings on recently logged areas. Observations indicated, however, 

 that numerous seedlings which became established beneath old-growth 

 stands survived logging disturbance. A regeneration survey of the 

 Maybeso clearcut showed that 60 percent of the area was stocked with 

 advanced seedlings, largely hemlock, which had become established 

 beneath old-growth stands. An additional 4 percent of the area was 

 stocked with seedlings which became established subsequent to logging. 



The advanced seedlings are well developed and appear to be in a 

 favorable position for becoming early components of regenerating 

 stands. The progress of these advanced seedlings will continue to be 

 followed, however, since there is some doubt as to how many of them 

 can survive in the open environment caused by clearcutting. 



Many occur on moss-covered, undisturbed soils which are subject to 

 high surface temperatures. These high temperatures increase seedling 

 transpiration and deplete moisture near the soil surface. 



Eight 1/4-milacre plots, on which 41^ western hemlock and 55 Sitka spruce 

 advanced seedlings existed, were established in the clearcut to observe 

 seedling survival and growth. Four plots were on well-drained soils and 

 four were on imperfectly drained soils. Summer mortality and growth, and 

 winter mortality will be recorded on these plots for several years. 



The study was begun in June and the first notes on mortality and growth 

 were made at the end of September. Mortality during the first summer 

 of record was 25 percent for seedlings less than 6 inches tall and 5 

 percent for seedlings grt^ater than 6 inches tall. Considering that 

 even the most poorly developed seedlings were tallied in June, mortality 

 does not appear unusually high. Most of the larger seedlings are well 

 developed and their roots penetrate into the deeper and more moist 

 organic layers insuring adequate water despite dry soil surface con- 

 ditions. These first records also indicate that mortality was slightly 

 higher and growth less on imperfectly drained soils. 



- 17 - 



