Figure 5
From: Evaluating Douglas-fir and western hemlock volume growth in response to thinning and fertilisation
Comparison of Douglas-fir volume estimates from Equations 3/ 4 to those from DFSIM. Four scenarios were run: Natural stand with no treatments (part a, Tables 1A – 1C in Curtis et al. 1982); Planted to 1000 stems per ha (part b, Tables 2A – 2C in Curtis et al. 1982); Planted to 1000 stems per ha and commercially thinned (part c, Tables 7A – 7C in Curtis et al. 1982); Natural stand pre-commercially thinned and fertilised (part d, Tables 11A – 11C in Curtis et al. 1982). Volume trajectories are shown for Equations 3/4 and DFSIM on a high site (site index = 38.1), medium site (site index = 32.0), and a low site (site index = 25.9). Equations 3/4, low 
; Equations 3/4, medium 
; Equations 3/4, high 
; DFSIM, low 
; DFSIM, medium 
; DFSIM, high 
.