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Northern Illinois Agriculture

University of Illinois Extension
DeKalb Corn planting rates 2012

Corn planting populations

Posted by Russel Higgins - Corn

An interesting result with corn planting populations occurred at DeKalb and Urbana in 2012. As farmers have pushed planting populations to maximize yields the University of Illinois has continued research to quantify outcomes with modern hybrids. Recent research has suggested little if any advantage to a harvest population  over 34,000 to 42,000 plants per acre. However, even though a yield benefit was not obtained by increasing the population above 42,000 plants per acre, neither was there a yield decrease. The only cost to farmers was the increased seed cost. In DeKalb and Urbana in 2012 a yield decrease was observed in most hybrids at the 50,000 plants per acre population. The 2012 study was planted in 30 inch rows.

Had a great day at the DuPage county office today filling in with the Master Gardeners and talking about insects!

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