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Spatial Variations in Stem Heartwood and Sapwood for Larix gmelinii Trees with Various Differentiation Classes Growth Characteristics of Heartwood and Sapwood of the Major Tree Species in Northeastern China COMPARATIVE STUDIES ON THE PERMEABILITY BETWEEN THE SOLVENT- EXCHANGED AND THE AIR-DRIED WOOD Impacts of Tree Species and Tissue on Estimation of Nonstructural Carbohydrates Storage in Trunk Radial Variation in Sap Flux Density as a Function of Sapwood Thickness in Two Eucalyptus (Eucalyptus urophylla) Plantations Character istics of Sap F lux Den sity andW a ter Use of P inus ca ribaeaP lan ta tion in Dry Sea son on the L eizhou Peninsula Effect of Pretreatment with Freezhing on Carbonization of Sugi (Cryptomeria japonica) Sapwood Effect of Flow Rate and Pressure Difference on Determination of Air Permeability of Masson Pine Effects of Provenances on Growth Characteristics of Sapwood and Heartwood of Larix gmelinii Trees A New Sapwood Rot on Seedlings of Prunus persica in Liaoning Province Variations in Amount and Ring Number of Sapwood and Heartwood of Pinus tabulaeformis AN APPROACH TO RELATIONSHIP BETWEEN SAPWOOD PERMEABILITY AND DISTRIBUTION OF LEAF AREA FOR LARIX PRINCIPIS-RUPPRECHTII