Variations in Wood Properties of Masson Pine (Pinus massoniana L.) Plantation Model for Maturation Age of Wood Property and Extend of Juvenile Wood Zone in Poplar Trunks Water Status Change in Wood Drying Studied By Time-Domain NMR DIFFERENTIATION OF JUVENILE WOOD ZONE AND EFFECT OF TREE GROWTH RATE ON INCREMENT OF THE JUVENILE WOOD Comparison on the Pulping Property between Juvenile and Mature Wood of Populus simonii×P.nigra GEOGRAPHICAL VARIATION AND CORRELATION IN SPECIFIC GRAVITY AND TRACHEID LENGTH OF JUVENILE WOOD OF MASSON PINE A Study on the Genetic Variation in the Mechanical Properties of Single Tracheids of Japanese Larix Stress-Strain Constitutive Relations of Longitudinal Compressed Elm Wood with Compound Alkali Liquor Processing The Chemical Groups and Bonds Characterization of Juvenile Wood and Mature Wood Lignins of Chinese Fir