Optimal harvesting schedules for a Gmelina arborea plantation in a Nigerian tropical rain forest
Optimal harvesting schedules for a Gmelina arborea plantation in a Nigerian tropical rain forest
J. S. A. Osho
ABSTRACT
A Linear Programming (LP) model was used to prescribe
timber harvest in the management of an even-aged forest
plantation. The plantation is being managed for timber
production on fifteen years rotation and on a 5-year
periodic planning. The solution of the LP showed that
about 5.8 x 107 m3 of wood was maximized. The optimal
solution preserved 2,945 ha (20, 730, 202 m3) of wood
was maximized. The optimal cut in Period-I (1995-2000),
3,766 ha (22,158,071 m3) in Period-II (1995-2005) and
2,515 ha (14,959,539 m3) in Period-III (2006-2010). Two
other feasible solutions were also worked out. The
volume per hectare of the plantation for Gmelina arborea
was unusually large because the plantation was not
thinned as at the time of the study.
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December 1995
Vol. 45, Iss. 4
