There are certain income for farmers and increased. Considering the statistics of timber since the average yield 2509 (1966) 60 kg/Rai/year. When grown as a substitute with rubber production well House restaurant-2543 (2000) increasing to 268 kg./4 x/year increase in farm town Wai during 35 years, farmer, farmers, rubber. In addition, the plant is grown and has a regular income for almost all year round. Price volatility is not much.