Levels-of-Growing-Stock Study (LOGS)
- Levels-Of-Growing-Stock (L.O.G.S.) Cooperative Study in Douglas-fir
- About the LOGS Cooperative
- Study objectives
- LOGS partners
- Study results for the CFS-BCMOF LOGS installations
- Future potential...
Study objectives
Study objectives were to determine how the amount of growing stock retained in repeatedly thinned stands of Douglas-fir effects:
- Cumulative volume production
- Tree size development
- Growth/growing stock ratios
Each installation followed the common work plan:
- 8 thinning regimes plus control, replicated 3 times = 27 plots (0.08 ha), each with a 10.1 m treated buffer surround (0.16 ha)
- treatment regimes differ in the amount of basal area allowed to accumulate in the growing stock (the amount of growth retained is a predetermined percentage of the gross basal area increase of the unthinned control plots)
- treatment plots are calibration thinned at establishment to a common stocking density
- treatment interval is dictated by local site productivity (stand height increment of 3.05 m)
Project status
- On-going