Source: University of Illinois

Illinois corn yielded less than expected in most areas in 2010, and corn following corn was particularly hard hit. Because current crop acreages are skewed toward corn, at least 20 percent of the 2010 corn in Illinois followed corn.

"This follows a period of several years during which corn following corn has often yielded about the same as corn following soybean," said Emerson Nafziger, University of Illinois Extension agronomist. "It has been common, particularly in the corn rootworm variant areas of Illinois, to have yields of corn following corn to be as high as those of corn following soybean, especially since the advent of rootworm resistance traits. For many producers, lower yields of corn following corn come as a shock."

Corn following corn was challenged from the start, Nafziger said. 

Original news release