BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Plantation Trial Unit Division of Bangladesh Forest Research Institute (BFRl) carried out a research in the western coastal area of Bangladesh during 2018—2020 in order to assess the growth of Sonneratia apetala (Keora) in relation to stand age. For this purpose, in the Char Kukri-Mukri area, 32 PSPs were established for eight age classes (11, 15, 20, 30, 35, 40, 42, and 45 years), and in the Rangabali area, 28 PSPs were established for seven age classes (30, 35, 42, 44, 45, 48, and 50years), followed by a stratified random sampling method. A significant difference was found (p < 0.05) for the height and diameter at breast height (DBH) growth of S. apetala stand among the different ages of plantation in both areas. At the Char Kukri-Mukri area, for 11 years old plantation found the highest height (0.357m) and DBH (0.570cm) growth rate after 1 year and continued after 2 years (0.662m; 1.085cm). On the other hand, for a stand age of 30 years, the highest height (0.216m) and DBH (0.246cm) growth rate were found in the Rangabali area after 1 year and continued after 2 years (0.353m; 0.390cm). A positive and strong relationship was found between height and DBH growth
rate after 1 and 2 years (r=0.850 and r=0.891) in the Char Kukri-Mukri area respectively. On the other hand, a positive and very strong relationship was found between height and DBH growth rate after 1 and 2 years (r=0.931 and r=0.913) in the Rangabali area
successively. This result will aid in the selection of appropriate forest management practices for managing S. apetala plantations on a sustainable basis in the western coastal belt of Bangladesh.
Toon wood (Cedrela toona) is less known in Bangladesh as a commercial timber species, but it also has the prospects of being used for joinery, musical instruments, and some specific furniture manufacturing purposes depending on its physical and mechanical properties. This study was intended to identify the compatibility of Toon (Cedrela toona) wood for furniture manufacturing in terms of exhibiting some machining and hand tool properties viz., planning, shaping, boring, mortising, and turning tests. The appraisal in both machining and hand tool property tests were based on the frequency of the defect-free samples. The finishing property was also ascertained by using two types of polishing materials, viz., carpa and shellac. The defects of the samples were conjectured by visual and tactile observation. The percentage of defect-free samples was assessed for each property operation and classified based on five quality grades. The results of this study mainly emphasized good working properties, and toon wood may be suitable for furniture manufacturing.
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