Field Crops 28.61-27
Highest Recorded Corn Yields in Wisconsin Counties
Joe Lauer, Corn Agronomist
Setting realistic yield goals and understanding the production potential of a cropping
system helps farmers make better management decisions. Knowing the highest maximum
corn yields recorded in a county can help producers make better production plans.
Many data sources can be used to determine the production potential of Wisconsin's
diverse soils and climate. The NRCS publishes production capabilities for each soil
series in Wisconsin. Yield contests and hybrid performance trials provide data that
can be used to establish production potential in an area.sconsin PEPS program has
had the objectives of: i) recognizing the practices utilized by the most profitable
growers and, ii) emphasizing soil and water conservation, efficiency, profitability
and competitiveness vs. productivity alone. The insights gained from this program
are used and integrated by other growers into their cropping systems.
The National Corn Growers Association has conducted yield contests since 1983. The
objective of this contest is to maximize grain yield production. Production costs
are not a consideration.
In both the PEPS program and NCGA Yield Contest, grain yield is measured on 10-acre
farm fields using field scale production equipment. Figure 1 lists the maximum corn
yields measured in Wisconsin counties. Yields tend to be greatest in south-central
and southwestern Wisconsin, although numerous counties in western and eastern Wisconsin
have recorded corn grain yields in excess of 200 bu/A. To date, the highest yield
recorded in Wisconsin was 254 bu/A and occurred in LaFayette county during 1998.