With the changing times, and the advent of western technologies, Thailand was compelled to initiate further developments to be on the par with the outside world. This is particularly true immediately after the concluding of the Bowing Treaty with the United Kingdom in B.E. 2398 (1855), which was a major condition determining Thailand’s steps towards trade liberalization, culminaiting in a rapid growth of the Thai economy, and its increasing economic links to the world economy. Thailand’s imports and exports doubled in both value and volume terms. As such, Thailand’s agricultural sector had to undergo a transformation process - from the then self-reliance approach to a new concept of export-orientated production. In this process, rice has increasingly become the primary export item consistently, which has tremendously brought in foreign exchange to the kingdom.