Table 2. The equation of the Kozak’s stem taper model used in this study (Kozak, 1988).
Model
Taper equation
Kozak 1988
d
=
a
1
D
B
H
a
2
a
3
D
B
H
X
b
1
Z
2
+
b
2
1
n
(
Z
+
0.001
)
+
b
3
Z
+
b
4
e
Z
+
b
5
D
B
H
H
where
Z
= relative height
=
h
H
X
=
1
−
h
H
1
−
p
a
n
, b
n
= parameters
d
= diameter(estimated) when h/H