Fig. 5From: An improved pollen number counting method using a cell counter and mesh columnsPollen and debris number with or without passage through the 20-μm mesh column. Particle numbers of pollen grain and debris were shown by boxplots. Boxplots were made by Table 2 data. N = 6, 6, 6, 6. Boxplots show center line: median; box limits: upper and lower quartiles; horizontal line of whiskers: not greater than 1.5 times the interquartile rangeBack to article page