Ag News: Gas Prices Up Again and Tractor and Combine Sales DownAg News: Gas Prices Up Again and Tractor and Combine Sales DownThe nation's average gas price increased for the fourth straight week, rising 15.3 cents from a week ago to $4.46 per gallon. Total farm tractor sales are now down 13.7% year-to-date.AgInfo.netAgInfo.net