Change of morphological character of bamboo culms in relation to the age have been described. Presence or absence of culm sheath and nodal root rings, branching pattern and colour was found to be diagnostic characters for determining the age of culms ranging from 1 to 4 years in the clumps of five major bamboo species of Bangladesh.

Acacia mangium Willd. (mangium) is a promising fast growing multipurpose tree species of the family Leguminosae. The species has been successfully introduced to Bangladesh and is being planted since 1983. An attempt was made to prepare the volume tables for the species. Diameter at breast height (D)-volumc and D-hcight-volume relationships were determined to estimate the total volumes overbark and underbark. It was observed that the logarithmic function to the base e gives a good fit model for the same.