Lumber recovery and grades of falcata (Paraserianthes falcataria (L.) Nielsen) at different ages and sites
2014
Alcachupas, P.L. | Alipon, M.A.
This paper presents the lumber recovery and grades of 4-, 6- and 8-year-old falcata (Paraserianthes falcataria (L.) Nielsen) from three sites: Pating-ay, Prosperidad, Agusan del Sur (Site 1); Nong-nong, Butuan City (Site 2), and Las Nieves, Agusan del Norte (Site 3) in CARAGA Region [Philippines]. The log samples were conventionally sawn using a portable horizontal narrow band sawmill. The differences in lumber recovery (LR), processing rate (PR) and lumber recovery factor (LRF) were significantly affected by age and site. Also, higher grade yields of No. 1C (No. 1 Common) were obtained from 8- and 6-year-old logs from Site 1, while 4-year-old logs yielded mostly No. 3 C. Lumber. The presence of defects such as unsound knots and pith and end splits affected the grades and quality of lumber produced. In some lumber, the magnitude of splits on one or both ends ranged from 200 mm to 500 mm long irrespective of diameter and age classes. The study recommends the development of grading standards for ITPS lumber and a cost and benefit analysis of the optimum rotation age for efficient utilization of the species.
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