Thursday, February 23, 2006
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.