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Extension > Minnesota Crop News > February 2006

Thursday, February 23, 2006

Planting dates and Minnesota state average corn yields, 1968-2005

D. R. Hicks, Agronomy and Plant Genetics

Extensive research over many locations and years in Minnesota has shown the yield advantage of early-planted corn. And Minnesota corn growers have responded by planting corn earlier. Since 1968, the average planting date for Minnesota's corn acreage has been earlier by about 1/2 day per year. The average planting date for corn was May 20 in 1968 and was May 3 in 2005. State average corn yields and date when 50% of the corn crop was planted (defined as the average planting date) were analyzed to examine the relationship between planting date and state average corn yields.
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