Thai farmers plough their field with ploughing machines in Ayutthaya province, central Thailand, Thursday, May 4, 2006. With rapidly rising of oil price Thai farmers had to pay double of the fuel from last year's growing season. Rising oil prices remained a threat to strong economy growth for Thailand this year and next, according to a U.N. report. (AP Photo/Apichart Weerawong)

Because of rapidly rising of the fuel prices, instead of ploughing machine, a Thai farmer ploughs his field with a buffalo Thursday, May 4, 2006 in Suphanburi province, central Thailand. Rising oil prices remained a threat to strong economy growth for Thailand this year and next, according to a U.N. report. (AP Photo/Apichart Weerawong)