Exporters have shipped soybeans from the busiest U.S. grains port at the fastest rate in nearly four years after rain raised water levels in the Mississippi River, government data showed.

Risk of getting stuck mean less grain per barge
Chicago wheat fluctuation 'just drives you nuts'
River levels at historic lows this fall
Outside forces pile on seasonal harvest pressures
Over 1,000 barges waiting to pass
Transportation woes are the latest headache in a sector plagued by slumping profits