Fig. 1. Projected root systems of seedlings in Japanese red pine (Pinus densiflora) on a (a) plane, and a (b) slope ß = 45° (Modified from Yamadera, 1990).
Fig. 1. Projected root systems of seedlings in Japanese red pine (Pinus densiflora) on a (a) plane, and a (b) slope ß = 45° (Modified from Yamadera, 1990).