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Gender-specific characteristics of tree-ring growth and differential responses to climate change in the dioecious tree Populus cathayana in Xiaowutai Mountains, China A Measurement Method of Wood Growth Ring Density Based on X-Ray Combined Image Processing THE ESTABLISHMENT AND PREDICTION OF THE DYNAMIC VARIATION MODEL OF WOOD GROWTH RING DENSITY FOR THE PLANTATION FOREST OF PINUS KORAIENSIS RESEARCH ON WOOD PROPERTIES IMPROVEMENT V. GENETIC PARAMETER ESTIMATES FOR RING DENSITY COMPONENT TRAITS OF NEW CLONES IN POPULUS DELTOIDES×P.SIMONII Timber Growth Ring Density Forecast Based on Process Neural Network with Time-Varied Input and Output Functions Studies on Variation of Poplar I-69 Tree-ring Width and Tree-ring Density TREE-RING CHARACTERISTICS OF LARIX GMELINII AND PINUS SYLVESTRIS VAR. MONGOLICA AND Influence of Host Plants and Rearing Density on Growth, Development and Fecundity of Arma chinensis Response of Ring Width and Ring Density of Platycladus orientalis to Climate Change in Beijing