The contemporary science of agronomics and meterology seem to get lost in the swirling mists of time as Thailand continues to celebrate a ceremony that the oxen that do the ploughing for the rice production have all the answers. It isn't even a Buddhist belief, but rather borrowed from the Hindu religion.
"In the ceremony, two sacred oxen are hitched to a wooden plough and they plough a furrow in some ceremonial ground, while rice seed is sown by court Brahmins. After the ploughing, the oxen are offered plates of food, including rice, corn, green beans, sesame, fresh-cut grass, water and rice whisky.
Depending on what the oxen eat, court soothsayers make a prediction on whether the coming growing season will be bountiful or not. The ceremony is rooted in Brahman belief, and is held to ensure a good harvest."
This is a Thai news report of the ceremony from 2010. There is a fascinating homage to HM the King which begins at 04:11 and has subtitles in English.