DEKALB® Corn Product Yield Response to Planting Rate in A Dryland Environment – Coastal East

Trial OverView

This trial was created to help understand the yield response of new DEKALB® corn products to planting rate and to begin to develop planting rate response data in the absence of GEN V testing for this area.

Research Objective

The objective of the experiment was to evaluate the agronomic and yield response of three newly released DEKALB® corn products to five different planting rates.

Location Soil Previous
Crop
Tillage Planting
Date
Harvest
Date
Potential
Yield/Acre
Planting
Rate/Acre

Multiple
Locations
in Alabama

Multiple Multiple Minimum
Tillage
Multiple Multiple

Multiple
21,000 seeds
24,000 seeds
27,000 seeds
30,000 seeds
33,000 seeds

SITE NOTES

  • Three on-farm locations in Northern Alabama were used for this study.
  • Each location was managed per the cooperators agronomic production practices.
  • Treatments included three different DEKALB® Brand corn products: DKC64-35, DKC67-44, and DKC70-27 brands planted at five different planting rates: 21,000, 24,000, 27,000, 30,000, and 33,000 seeds/acre.

Understanding the Results

 

Figure 1. Average corn yield (bu/acre) and average net return ($/acre) by corn product and planting rate.

Understanding the Results

  • Net return is based on gross profit of $4.00 per bushel less the retail cost of the seed.
  • DKC64-35 brand showed a positive yield response to all tested planting rate increases. However, the best net return was reached at a planting rate of 30,000 seeds/acre.
  • For this trial, DKC67-44 brand had the highest average yield and net return at a planting rate of 27,000 seeds/acre.
  • DKC70-27 brand showed a positive yield response to all tested planting rate increases. However, the best net return was reached at a planting rate of 30,000 seeds/acre.

What Does This Mean for Your Farm

  • When selecting a corn product, it is important to understand corn product response to planting rate to gain the most optimal net return.
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