Response of DEKALB® Corn Products to Seeding Rate

Trial Objective:

• To compare the yield response of ten DEKALB® brand corn products to four different seeding rates.

Research Site Details:

  • Each corn product was planted in 38-inch row spacing at 28,000, 32,000, 36,000, and 40,000 seeds/acre.
  • Plots size was 0.15 acres and the trial was not replicated.
  • Plots were field-dried and machine harvested; yields were corrected to 15.5% moisture.

Understanding the Results

  • Final established stands averaged 85%.
  • Results from this study indicate that optimal yield was reached at approximately 35,000 seeds/acre.
  • Some corn products responded favorably to higher seeding rates.
  • Corn products planted at sub-optimal seeding rates did not maximize the yield potential.
  • Corn products planted at higher than optimum seeding rates had greater levels of lodging along with increased seed cost.
  • For these reasons, seeding rate is one of the most important decisions that a grower makes in the planning process when trying to optimize corn yield.

What Does This Mean for Your Farm?

  • Knowing the optimal seeding rate of a corn product can help to obtain maximum yield potential.
  • High-density populations result in increased lodging and other harvest risks, while yield potential may decline with decreased populations.
  • Each product planted should be evaluated based on farm yield potential, yield response to seeding rate, and potential harvest timing for each operation.