Corn was planted generally in three time windows this year, with only slight variation due to location. Rainfall was constant and consistent in areas this spring, causing week-long delays at times for field work. The impact of this type of planting season will be fully realized later, although it is obvious across the state that some plantings look better than others. Oftentimes, the "first" planting looks the best, then the "third," with the middle planting looking the poorest in terms of stand uniformity and plant color.
Iowa State University
Abendroth, Lori and Elmore, Roger W., "2007: Tri-modal planting dates for corn" (2007). Integrated Crop Management News. 1066.
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