On November 14 the same year, His Majesty donated his private funds to launch the Royal Rainmaking Project, and he devoted a great deal of time and energy to develop rainmaking technology. Later, he entrusted M.R. Debariddhi Devakula, an expert in agricultural engineering at the Ministry of Agriculture and Cooperatives, to undertake research into rainmaking. M.R. Debariddhi conducted intensive research and experimentation over several years from various models applied by various countries, such as the United States, Australia, and Israel. After initial research, the first practical experiment took place over a mountain barrier at Khao Yai National Park in Nakhon Ratchasima Province in July 1969, supervised by His Majesty. The operation used light aircraft and seeded clouds with dry ice, or solid carbon dioxide. His Majesty had personally devised chemical formulae for seeding clouds in the rainmaking process. The first attempt at artificial rainmaking was successful; the clouds turned grey and rain did fall. However, there was no way to ensure that rain fell on a specific area. Then further experiments were carried out in HUA HIN District, Prachuap Khiri Khan Province, with rainfall in target areas.