Thailand is located
20°2’N latitudes and
longitudes. Amongst its 72 provinces 17 are
used for commercial rubber {Hevea brasiliensis
Muell) plantings. These plantations
are in the southern and eastern regions
between 5° 7′ and
98° and 105°E of the country. In recent years some
experimental plantations have also been raised
in the northern pait. About 1.6 million
hectares of rubber plantations have been raised
so far out of its total area of 51.4 million
hectares (Lim Pholoh 1984, pers. comm.)