NEWS
Corn-on-Corn Penalty
Pam Smith DTN\Progressive Farmer Crops Technology Editor
Fri Apr 11, 2014 11:35 AM CDT

DECATUR, Ill. (DTN) -- Continuous corn can take a toll on crop yield. That's true even in intensively managed corn-on-corn fields, according to a six-year study conducted in Illinois by DuPont Pioneer agronomists.

The report found continuous corn yielded 25 bushels per acre less than corn planted following soybeans. Nitrogen (N) was the most important factor in explaining the loss. The continuous corn yield penalty decreased as soil nitrogen supply increased.

The number of years the field was planted to corn was the second-most important component of the yield penalty, according to the study.

Weather proved to be the third ...

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