Highest Recorded Corn Yields in Wisconsin Counties
November 18, 1999 6(27):168-169
Joe Lauer, Corn Agronomist
Early projections for 1999 indicate that Wisconsin corn farmers will set a new record
for grain yield. Setting realistic yield goals and understanding the production
potential of a cropping system helps farmers make better management decisions. 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. Additionally, yield contests and hybrid performance trials
provide data that can be used to establish production potential in an area.
Since 1987, the Wisconsin 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. In the PEPS program, 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 participating in the PEPS program.
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. Counties that have recorded yields
in excess of 220 bu/A include Buffalo Calumet, Columbia, Grant, and Manitowoc.