The Impact of Seeding Rate and Reduced Irrigation on Corn Products

TRIAL OBJECTIVE

  • Determining the optimal seeding rate for a variety of corn products grown under 50% full irrigation (FI) can help a farmer maximize yield while reducing irrigation costs.

  • The objective of this trial was to compare the yields of nine corn products planted at multiple seeding rates and grown under 50% FI.

 

RESEARCH SITE DETAILS

LocationTexas County, OK  
Soil Type Clay loam 

Previous
Crop
Wheat  
Tillage
Type
Strip till  


 
Planting Date5/08/20  
Harvest Date10/18/20 

Potential Yield
 (bu/acre)
150  
Seeding Rate
(seeds/acre)
18K, 28K, 32K,
36K, 40K, 48K


 

 

 

  • Nine corn products were grown at six seeding rates under reduced irrigation conditions of 50% FI in Texas County, OK. 
    • The corn products ranged in maturity from 106 to 113-RM.
    • The seeding rates were: 18,000, 28,000, 32,000, 36,000, 40,000, and 48,000 seeds/acre.
    • The trial was irrigated with 50% FI water using zone control sprinklers.
  • Total shelled weight, test weight, and moisture content were collected to calculate yield.

  • Weeds were controlled uniformly, and no additional insecticide or fungicide was applied.

  • Each treatment was replicated twice and only averages are reported in this report as no statistical analysis was performed.

 

UNDERSTANDING THE RESULTS

image Figure 1. Average yield of nine corn products grown under six seeding rates and 50% FI, Texas County, OK (2020) (2 replications).
  • No seeding rate was consistent at producing the greatest yields across the nine products. 

  • The 108-RM and 111-RMa products tended to have the greatest yields across the seeding rates under 50% FI.

  • The range of average yields for the nine products grown under 50% FI was 101.3 to 191.7 bu/acre.

 

KEY LEARNINGS

  • Picking the right corn product for the right field when irrigation water is limited because of either pumping capacity or water allocation is challenging.  However, a corn product like 111-RMa has high end yield potential across a wide range of seeding rates in a challenging, water stressed environment.   

  • Contact a Bayer brand seed representative to determine which corn product and seeding rate best fits your production system.

 
 
3021_R11_20
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