Gurjan Tree (Dipterocarpus alatus)
Scientific Name: Dipterocarpus alatus — Gurjan, Yang Oil Tree.
Native Home: South and Southeast Asia, including India and parts of mainland Southeast Asia.
Height: 30–45 metres.
Lifespan: Several decades or longer.
Uses and Harvesting
Timber: Used for construction, plywood, boats and general woodwork.
Harvesting: Mature trees are felled for timber; resin and oleoresin may also be collected.
Age to Harvest: Around 25–40 years or more for timber, depending on growing conditions and forestry practices.
Products: Timber, plywood, resin, oleoresin and plantation-grown trees.
History and Global Production
Traditional Use: Wood has been used in buildings and boats, while resin has served traditional and commercial purposes.
Global Spread: Native to South and Southeast Asia and planted in some tropical forestry regions. Sustainable management is important because natural populations have declined in parts of its range.
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