Vegetation of Southeast Asia Studies of Forest Types 1963-1965

Figure 18.-The tall "yang khao 1 tree (Dipterocarpus alatus) is readily
distinguished from the air by its tall, straight, light-colored trunk.
Phibun Mangsahan, eastern Thailand Dec. 1963.
Figure 19.-Extensive areas of forests have been felled in some areas of
Thailand, especially in the north, for shifting agriculture, and which
are later abandoned (top left). Progress is being made in such zones
to establish stable agriculture for growing rice, fruit trees, cotton,
tobacco, etc. Near Nakon Nayok, Korat Plateau. Northeastern Thailand.
Nov. 1963.
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