Soybean Planting Date

The Iowa State University current optimum soybean planting recommendation for the southern 2/3 of Iowa is the last week of April and first week of May for the northern 1/3 of Iowa.  Purdue researchers also indicate that a 3-day delay in planting will cause a 1-day delay at harvest.  At our Agronology 10 Research Center in Walcott, we have planted our soybean on average the 26th of April for the time period 2001 thru 2011.  These soybeans have had an average yield of 65.7 Bu/A.