B.C. Ministry of Forests Forest Science Program
		Abstract for Working Paper 27

		Site Index Adjustment for Old-growth Coastal Western Hemlock Stands in the Kalum Forest District
		Authors or Ministry Contacts: G.D. Nigh and B. Love
		Branch: Research
		Subject: Growth and Yield
		Series: Working Paper
		Other details: Published July 1997, 13 pages.

Abstract

Inventory information indicates that the average site index of old-growth western hemlock (Tsuga heterophylla (Raf.) Sarg.) leading stands in the cwh portion of the Kalum Timber Supply Area is 13.3 m. Field observations by many foresters suggest that second-growth stands are performing much better than the inventory information indicates. Therefore, a study was conducted to examine the change in estimated site index when old-growth hemlock stands are harvested and regenerated to managed hemlock. The site indices of old-growth stands were compared to those of regenerated stands by spatial (paired plot technique) and temporal (relocated temporary sample plot) methods. Site indices measured in the managed stands were 11.3 m greater than those measured in the old-growth stands. The application of the results is discussed.

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