Table 2 . -- Estimated hemlock volume loss from black-headed budworm and 

 hemlock sawfly epidemics (1948-1955) in Southeast Alaska 



Acres B^- ^ ^ . vol. Total 

 ^ per acre 



Heavy loss 8,000 x 7,250 58,000,000 bd. ft. 



Moderate loss 52,000 x 2,700 140,400,000 bd. ft. 



Light loss 52,000 x 1,350 70,200,000 bd. ft. 



Total loss 268,600,000 bd. ft. 



FOREST MANAGEMENT RESEARCH 



Regeneration Studies 



In determining, by reproduction surveys, whether a clearcut area is 

 stocked, everything depends upon the examiner's ability to identify 

 an "established" seedling. In surveys made on cutover areas where 

 advanced reproduction was either absent or ignored the counts of new 

 seedlings each year varied greatly on the quadrat as noted in 

 table 3 below. There were 39 seedlings at the end of 1927. Logging 

 was completed in 1926. 



Table 3. -- Seedling variation on a reproduction plot 



Year During the year this number of seedlings 



Died Germinated Remained 



1928 11 30 58 



1929 31 8 35 



1930 5 14 44 



1931 12 II 43 



1932 8 8 43 



1933 3 3 43 



Of the 58 seedlings remaining in the fall of 1928, only 25 lived 

 through 1933. These were the "established" seedlings and they are not 

 so easy to recognize unless they are advanced seedlings that have 

 already become established before logging. 



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