Organic matter removal and soil compaction are two types of soil disturbance that occur during forest harvesting activities. Both of these types of disturbance have the potential to reduce the long-term productivity of all vegetation which grows on the site. Quantifying the effects of different levels or organic matter removal and soil compaction is one of the objectives of the Long-Term Soil Productivity Study (LTSP). Over 62 research installations in North America are linked in the LTSP network (Powers 1990, and http://www.fs.fed.us/research/wfwasr/soils_brochure2.htm). Previous extension notes have described the study design (Kabzems 1996), and initial trends for regeneration responses (Kabzems 2000a)and vegetation responses (Kabzems 2000b)to the treatments. In this note, the growth responses of trembling aspen and white spruce regeneration to different levels of organic matter removal and soil compaction are reported, according to statistical tests of the main factors.
Download LTSPS Research Note 006 PDF file (1568 KB)
To view this document you need the current version of
Adobe Acrobat Reader, available free from the
Adobe Web Site.
Updated December 17, 2008