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Project Title: Crop-tree Thinning of Western Larch
Project Number: EP 511
District: Rocky Mountain Forest District
Location: Perry Creek
Lat. 49 34'N - Long. 115 55'W
Principal Researcher: Wayne Johnstone
Kalamalka Forestry Centre,
Vernon, B.C.		 Phone: (250) 260-4769
e-mail: Wayne.Johnstone@gov.bc.ca

Objectives:

To compare the growth and development of a number of individual western larch trees in a young, pure stand, after being subjected to three intensities of thinning and control.

Experimental Design:

Treatments

  • Individual trees were spaced in circles with radii of 2.4, 3.6 and 4.8 m, plus an unspaced control.
  • Six diameter classes between 2.5 and 15.0 cm were recognized at the time of spacing.

Layout:

Six trees in each of the six diameter classes were spaced to randomly assigned radii of clearance. Trees are located for remeasurement using a stem map of the area.

History:

  • 1958 Project establishment and first assessment
  • 1963 - 1998 Remeasurement and progress report every five years
  • 1999 classified biogeoclimatically.

Status: Active

Reports and Publications:

Thompson, C.F. 1992. Crop-tree thinning of Western Larch in Southeastern British Columbia: 30-year Results. B.C. Min. For. Research Note 110., Victoria, B.C.

Thompson, C.F. 1992. Crop-tree thinning of Western Larch in Southeastern B.C., B.C. Min. For., Nelson, B.C. Research Summary RS-002.