Research Branch

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Effects of Thinning and Fertilizing Mixed Western Hemlock - Sitka Spruce Stands

Author(s) or contact(s): L. de Montigny and R.J. de Jong
Source: Research Branch
Subject: Thinning and Spacing
Series: Extension Note
Other details:  Published 1998. Hardcopy is available.


Limited information exists on the growth and yield of young mixed western hemlock (Tsuga heterophylla) and Sitka spruce (Picea sitchensis) stands on the Queen Charlotte Islands following pre-commercial thinning and fertilization. As a result, research into thinning and fertilization was initiated by the South Moresby Forest Replacement Account research committee. Our research project (Experimental Project [EP] 1097), conducted on Graham Island, investigates tree and stand growth responses to thinning and nitrogen and phosphorus fertilization in young Sitka spruce-western hemlock stands. In this extension note, we describe this project, present the 5-year response results taken from remeasurements after the 1996 growing season, and offer some preliminary conclusions.

Download Extension Note 28 PDF file (356 KB)

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Updated April 19, 2007