ABSTRACT
A study was undertaken to estimate the magnitude of dynamic stresses (MDS) induced in some mature tropical
hardwood species during felling operation and their effect on the harvested wood. Five areas in Shasha forest reserve,
Osun State, Nigeria were selected as the study sites because of the prevalent high. Two hundred and eighty nine trees
represented by nine different species were studied. The species are Afzelia africana, Nauclea diderrichii, Terminalia
superba, Khaya ivorensis, and Triplochiton scleroxylon Entandrophragma angolensis, Cordia millen ii, Mansonia
altissima and Milicia excelsa. Using a checklist, information were collected on tree factors, terrain of the sites and
experience of the operators. During felling of each tree, the duration of impact was estimated. Data collected were
subjected to statistical analysis. The average content of the green wood ranged from /08% to /47% (dry basis) for all the
species. T71eaverage ill7,actforce ranged from /.498 X J06N to 7.588 X J06N, while the maximum dynamic stress
ranged from 8.38 x 10 N/m for Trip/ochiton scleroxylon (Obeche) to /8.75 x 106N/m1for Naue/ea diderrichii (Opepe).
The observed values of dynamic stress are very much higher than the ultimate static stress values for all the species and this
will definitely affect the wood quality of the felled trees.
O., O (2021). Felling Induced Dynamic Stresses In Some Tropical Hardwoods From Nigerian Lowland Rainforest. Afribary. Retrieved from https://afribary.com/works/felling-induced-dynamic-stresses-in-some-tropical-hardwoods-from-nigerian-lowland-rainforest
O., Omole "Felling Induced Dynamic Stresses In Some Tropical Hardwoods From Nigerian Lowland Rainforest" Afribary. Afribary, 23 Apr. 2021, https://afribary.com/works/felling-induced-dynamic-stresses-in-some-tropical-hardwoods-from-nigerian-lowland-rainforest. Accessed 23 Dec. 2024.
O., Omole . "Felling Induced Dynamic Stresses In Some Tropical Hardwoods From Nigerian Lowland Rainforest". Afribary, Afribary, 23 Apr. 2021. Web. 23 Dec. 2024. < https://afribary.com/works/felling-induced-dynamic-stresses-in-some-tropical-hardwoods-from-nigerian-lowland-rainforest >.
O., Omole . "Felling Induced Dynamic Stresses In Some Tropical Hardwoods From Nigerian Lowland Rainforest" Afribary (2021). Accessed December 23, 2024. https://afribary.com/works/felling-induced-dynamic-stresses-in-some-tropical-hardwoods-from-nigerian-lowland-rainforest