Influence of Seeding and Irrigation Rates on Six Dekalb® Brand Corn Products in Northeastern Nebraska



  • Information is needed on how seeding and irrigation rates influence corn product performance. 

  • This study was designed to assess corn products across multiple seeding rates and irrigation environments to help growers select products and seeding rates for the irrigation environment on their farm.  



Location Battle Creek, NE Planting Date 5/2/19
Soil Type  Loamy sand Harvest Date 10/28/2019
Previous Crop Corn
Potential Yield
Tillage Type Conventional
Seeding Rate
  • Six DEKALB® corn brand blends ranging from relative maturities (RM) of 108 to 113 were evaluated.
  • The trial was a split-plot design with irrigation as the whole plot and corn product by seeding rate as the subplot. Treatment combinations were replicated twice.
  • Two irrigation rates were used:
    • Full irrigation (100% FI) – 7.6 inches/acre 
    • 50% of FI – 3.8 inches/acre 
  • In addition to irrigation, 23.7 inches of rainfall occurred during the growing season.
  • For both irrigation rates, the six corn products were planted at 32, 36, and 40K (K=000s) seeds/acre.
  • At 100% FI, the six products were also planted at 24, 44, and 50K seeds/acre.
  • At 50% FI, the six products were also planted at 18, 28, and 48K seeds/acre.
  • Weeds were managed uniformly, and no fungicides or insecticides were applied.




  • The performance of each corn product under the different seeding rates stresses the importance of knowing the optimum seeding rate for each product (Table 1).
  • As a general trend, yields were greater at higher seeding rates. However, on an individual product basis, 4 of the 6 corn products had their highest yield at 44,000 seeds/acre under 100% FI and 4 of the 6 corn products had their highest yield at 48,000 seeds/acre under 50% of FI. Each corn product exhibited a higher average yield under 100% FI.





  • Corn products differ in their response to irrigation amount and seeding rate.
  • Producers should consider their irrigation and precipitation environment when making product and seeding rate decisions to achieve the best yield potential on that acre.
  • Growers should consult their local seed sales team for information on how their branded products performed in the study.



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