Fig. 2From: Variation in black spruce (Picea mariana (Mill.) BSP) wood quality after thinningChange before and after thinning year (time = 0) in ring density (RD, kilograms per cubic metre) (a) and average ring density (Average RD, kilograms per cubic metre) (b) for both thinned (CT, black circle) and control (C, white triangle) standsBack to article page