Table 5. Model constraints for estimating optimal timber production in national forests.
Constraint
Description
Sustained timber yield
0.7
H
p
−1
≤
H
p
≤ 1.3
H
p
−1
(
H
p
: Harvest volume at period
p
)
Age-class distribution
All age-class
Min.
10%
Ratio in area by species
Larch (
Larix kaempferi
)
Min.
30%
Deciduous
10%
Pine (
Pinus densiflora
)
Max.
20%
Ratio in area by forest stand
Conifers
Min.
25%
Deciduous
25%