Individual Growth Model for Eucalyptus Stands in Brazil Using Artificial Neural Network

Table 1

Characteristics of Eucalyptus grandis × Eucalyptus urophylla stands located in Monte Dourado, Pará state, Brazil.

Age (months)	24–72
Diameter at breast height: d.b.h. (cm)	4.0–29.4
Average diameter: 𝑞 (cm)	7.3–18.4
Total height: Ht (m)	8.5–34.1
Dominant height: Hd (m)	13.1–34.8
Basal area (m² ha^−1)	4.7–27.2
Volume (m³ ha^−1)	23.8–353.9
Density (trees ha^−1)	760–1180

d.b.h.=∑^𝑛_𝑖=1d.b.h._𝑖/𝑛, 𝑞=∑^𝑛_𝑖=1d.b.h._𝑖²/𝑛, Ht is the distance between the ground and the top of the tree, and Hd is the five trees heights of largest d.b.h. on each plot.