Optimum harvesting time and clone choices for eucalyptus growers in Vietnam

Cited 2 time in Web of Science Cited 2 time in Scopus

Nguyen, Huu-Dung; Youn, Yeo-Chang

Issue Date
Forest Policy and Economics, vol.15, pp. 60-69
Eucalyptus cloneTree farmingOptimal harvesting timeVietnam
This paper investigates the productivity and optimal rotation for economic timber management of Eucalyptus
urophylla S.T Blake clones being planted in Northeast Vietnam in Fluvic Gleysol and Ferric Acrisol soils. In the
first section of the paper, timber yield functions for all eucalyptus monoculture clones and seedlings are identified.
Next, the biological optimum rotation period for maximizing sustained yield is calculated based on the
yield functions for each soil type. In the last section, the economically optimal rotation (EOR) lengths for all
clones and seedlings planted in the two types of soil are calculated using a modified Faustmann model.
The results indicate that eucalypts in Fluvic Gleysol will produce larger timber yields than in Ferric Acrisol.
Among the clones commonly planted in Northeast Vietnam, eucalyptus clones U16 and PN14 can yield the
largest timber volumes in Fluvic Gleysol and Ferric Acrisol, respectively. Our EOR model reveals that EOR
lengths of eucalyptus plantations in Northeast Vietnam are longer than the biological rotation time by 1–
3 years under the governmentally subsidized credit scheme for rural households. If growers borrow from
commercial and private entities, such rotation period will be substantially shortened and negative site values
will appear in a number of cases. Nevertheless, wherever eucalyptus clones are economically qualified, their
EOR length is longer than what is currently practiced. To capture the highest profits from eucalypt plantations,
growers should extend their current farming business cycle of 7 years to 14–18 years under the subsidized
credit scheme and to 10–12 years under the commercial borrowing interest rate. As increasing land use
profitability is of great concern across the region, these findings are of practical importance for Vietnamese
farmers in choosing clones, land lots, and economic optimal rotation for their farming businesses.
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College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Forest Sciences (산림과학부)Journal Papers (저널논문_산림과학부)
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