Ministry of Forests Research Branch Ministry of Forests

Research Branch header -
 You are here:
  Research Branch > Stand Management > Juvenile Thinning > EP 511

Crop-tree Thinning of Western Larch (EP 511)

Objectives

To determine the effects of tree size and post-thinning density on the growth and development of thinned western larch crop trees.

Treatments

In this single-tree experiment, 20 trees within each of six diameter classes were selected at the time of trial establishment (120 trees in total). Each of three crop-tree thinning treatments (removal of all competing vegetation to a radii of 2.4, 3.6, and 4.8 m around each selected tree) plus an unthinned treatment were randomly assigned to five trees within each diameter class.

The study was established in 1958 in a 31-year-old, fire-origin mixed stand of western larch, Douglas-fir and lodgepole pine within the IDFdm2 biogeoclimatic subzone northwest of Cranbrook. The installation was re-measured on about a 5-year cycle until 1998, when it was switched to a 10-year re-measurement interval.

Publications

Thompson, C.F. 1992. Crop-tree thinning of western larch in southeastern British Columbia: 30-year results. B.C. Ministry of Forests, Victoria. Research Note No. 110.

Contact TOP Top of the page
feedback privacy disclaimer copyright top of this page

Last Modified: 2007 APR 20.  Ministry contact: Frank van Thienen
Webmaster: For.Prodres@gov.bc.ca

 

footer