OMAHA (DTN) -- The summer fertilizer roller coaster ride continues.

Retail fertilizer prices tracked by DTN for the third week of July were lower for all eight major fertilizers. These lower prices come on the heels of higher prices seen last week, which some retailers thought could be the beginning of higher fertilizer prices for the upcoming fall fertilizer season.

Leading the fertilizers lower was urea, which was down 12 percent. Next was UAN28, down 9 percent, followed by 10-34-0, which decreased by 6 percent. Anhydrous, DAP, MAP, potash and UAN32 were all just slightly lower than the third week ...