Figure 2From: Evaluating Douglas-fir and western hemlock volume growth in response to thinning and fertilisationGraphs of stand volume (m3/ha) versus total age for Douglas-fir (a) and western hemlock (b). Volume trajectories are shown for four levels of thinning at a site index of 29Â m. 0% removal: ; 20% removal: ; 35% removal: ; 50% removal: .Back to article page