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Figure 2

Volume increment of Scots pine (IV) over stocking degree (S) according to equation (18): (a) varying species proportion by area (P) for a dominant height (Hdom) of 15 m; (b) varying origin (N -natural; P -plantation) and Hdom for P = 0.5; when P < 1, IV is the volume increment of the species related to its occupied area, IVp in Table IV.