OMAHA (DTN) -- Anhydrous fertilizer is continuing its summer price rally, according to retail fertilizer prices tracked by DTN for the week of August 16.

The latest survey shows anhydrous running 18 percent higher than a month earlier, averaging $590.38 per ton, a leap of $124 per ton since early July.

UAN28 continues to be higher, up 9 percent compared to a month ago. MAP was up 8 percent, 10-34-0 up 7 percent and DAP and urea were both 5 percent higher for the month.

MAP had an average price of $541.15/ton, UAN28 $268.10/ton, UAN32 $287.57, urea $383.89/ton, 10-34-0 $409.47/ton ...