Fig. 9

Box plots of the density distribution of peak densities and lowest earlywood densities in each line segment. The upper and lower boxes indicate the peak and lowest earlywood densities in each line segment, respectively. The horizontal lines from the top indicate maximum, first quartile, median, third quartile, and minimum values in the data set, respectively. The white and gray circles indicate outliers at each position. a Pine-Fukui, b pine-Tokyo, c cedar, d larch