Figure 5

Relative growth rates of the British Douglas fir ( Pseudotsuga menziesii (Mirb.) Franco) yield class model for yield class 24, initial spacing 1.7 m × 1.7 m and crown thinning (Edwards and Christie 1981 ). A: The relative volume growth rate (red) and relative loss rate (blue) B: The corresponding relative growth rates of the quadratic mean stem diameter height (blue) and of top height (red).