The Thai people depend on agriculture need a large amount of water for farming activities had to wait for seasonal rain to grow crops. As a result the crop production suffered from drought. HM King Bhumibol Adulyadej learned about this problem the Government established the Artificial Rainmaking Research and Development Project. Since demand for artificial rain has increased , HM King Bhumibol discovered a new technique to gain more cloud density to increase the amount and extent of rainfall. He named the new cloud-seeding technique "Super Sandwich" Has been widely recognized and has made Thailand the centre of tropical rainmaking