Forest Investment Account (FIA) - Land Base Investment Program
FIA Project 2421004

    Fourth year post-treatment response for a problem forest type research trial
Project lead: West Fraser Mills Ltd.
Author: Yole, David W.
Imprint: Burns Lake, B.C. : Morice and Lakes TSA, 2006
Subject: Forest Investment Account (FIA), Pinus Contorta, Effect of Fires on
Series: Forest Investment Account (FIA) - Land Base Investment Program
A formal growth and yield research trial was initiated in 2001 on a poor growing lodgepole pine (Pl) stand in the Northern Interior of British Columbia. This report describes the response of the stand to treatments four years after treatments were imposed. The stand developed on a moist to mesic, fine-textured site within a 23 year-old wildfire, known locally as the Swiss Fire near Houston BC. The trial was designed to look at response of a 15 year-old Pl problem forest type (PFT) stand to innovative and conventional silviculture treatments to see if poor growing stands respond positively to treatment. As PFTs are currently removed from the THLB, it was decided that more research was needed to determine whether such PFTs have greater site growth potential than expressed by the repressed Pl stand category that currently exists. The stand being studied is approximately 22 years old and very dense (~50,000 sph), approximately 1.5m in total height and has an estimated Site Index of 6.6m/50 years. Such a stand fits the category of non-merchantable, low site or PFT, given current harvesting/utilization standards (Yole, 2001). Left untreated, this stand would not be expected to be merchantable in size in less than 150 years. This trial was designed and installed in an attempt to reveal what factors are limiting growth and whether treatments can eventually lead to a productive stand that will contribute to the THLB.
prepared by David W. Yole.


Post-Treatment Response Report (3.2Mb)

To view PDF documents you need Adobe Acrobat Reader, available free from the Adobe Web Site.

Updated August 16, 2010 

Search for other  FIA reports or other Ministry of Forests and Range publications.

Please direct questions or comments regarding publications to