Residue Reduction 



One of the objectives of the study was to evaluate additional residue reduction 

 achieved by relogging. Post-harvest residues 3 inches (7.62 cm) in diameter or longer 

 amounted to 8,940 cubic feet (253 m 3 ) on Danby Ridge and 8,978 cubic feet (255 m 3 ) on 

 Lee Creek. Relogging resulted in removal of 5,291 cubic feet (150 m 3 ) on Danby Ridge, 

 a reduction of 59 percent. An additional 3,931 cubic feet (113 m 3 ) was removed in re- 

 logging Lee Creek, a reduction of 44 percent. A per-acre approximation of the cubic 

 volumes existing prior to each treatment is shown in table 5. Pre-harvest volumes were 

 found by applying a board foot: cubic foot ratio of 5 to 1 to the total of table 1. 

 Post-harvest and post-relogging volumes were obtained from table 4. 



Residue conditions following relogging on both study areas are shown in figure 3 

 (Danby Ridge) and figure 4 (Lee Creek) . 



Table 5. — Gross residue 



volumes per acre for major phases 



of study 



Study phase 



: Danby Ridge : 



Lee Creek 





Cubic feet 



Cubic feet 



Preharvest 



4,500 



3,760 



Harvesting: 







Post harvest 



1,788 



1,805 



Residual 



20 



500 



Total 



1,808 



2,305 





(51 m 3 ) 



(65 m 3 ) 



Relogging: 







Post relogging 



730 



1,009 



Residual 



20 



500 



Total 



750 



1,509 





(22 m 3 ) 



(43 m 3 ) 



10 



