**8. Conclusion**

Agricultural zoning is a regulatory approach that redefines property rights. The technique has been used to preserve agricultural area and ensure food security. Many empirical evaluations of its effectiveness in several countries have been made, but they cannot be used as a reference to other countries as each country has unique context and circumstance.

Thailand is one of the Asian developing countries, which has adopted the agricultural zoning, but the method is adjusted to be the commodity-based format and not use-based format. The main objectives of agricultural zoning in Thailand are to address the issue of mismatching between land use and land suitability and the issue of crop price instability. Agricultural zoning in Thailand has been established since 1979, but it showed limited success mainly due to the variable factors that the government considers which are not in line with private demand. In addition, the implementations of latter policies are contradicted to the zoning policy. The program has caused an agricultural transformation in Thailand in the dimension of crop diversification, but it needs a major revision in order to achieve its goals.

The revision proposed is to set agricultural commodity price based on its origin. There are two strategies for meeting Thailand's agricultural zoning objectives. First, after setting the price based on its origin, the government should also play a small role as possible in intervening the agricultural commodity market. Second, the government should integrate a crop production information system with the Agri-map of the MOAC for farmer to check the production area quantity of each crop in the country. This current production quantity information should be updated at least monthly, so that farmer will have sufficient information to make a decision on the quantity supply of the agricultural commodity apart from the price.
