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Clonal means of the axial compression stiffness (E; a), axial compression strength (σa; b) at 12% of water content, bending stiffness (MOE; c) and bending strength (σb; d) at full saturation related to clonal means of wood density. Different symbols indicate different clones and error bars represent one standard error. Correlation coefficient of the linear equations is marked with a single asterisk (*) if significant at the 5% level and with two asterisks (**) if at the 1% level.
