The Impact of Seeding Rate and Reduced Irrigation on Five DEKALB® Brand Corn Products

TRIAL OBJECTIVE

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

  • The objective of this trial was to compare the yields of five DEKALB® Brand products planted at six seeding rates and grown under 50% FI.

 

RESEARCH SITE DETAILS

Location Texas County, OK    
Soil Type  Clay loam  

Previous
Crop
Wheat    
Tillage
Type
Strip till  


 
Planting Date 5/08/20    
Harvest Date 10/18/20  

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


 

 

  • Five DEKALB® brand corn products were planted at six seeding rates under reduced irrigation conditions of 50% FI in Texas County, OK. 
    • The DEKALB® brand corn products were:
      • DKC59-07RIB Brand Blend
      • DKC59-81RIB Brand Blend
      • DKC60-87RIB Brand Blend
      • DKC61-98RIB Brand Blend
      • DKC63-91RIB Brand Blend
    • 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 five DEKALB® Brand Blend corn products planted at six seeding rates with 50% FI, Texas County, OK (2020) (2 replications).
  • For this trial, DKC61-98RIB Brand Blend produced relatively consistent average yields across seeding rates, while all other DEKALB® Brand Blends   responded differently to seeding rates. None of the seeding rates tested were consistent at producing the greatest yields across the five products.

  • The average yields for the five DEKALB® Brand Blends ranged from 101.3 to 164.2 bu/acre under 50% FI.

 

KEY LEARNINGS

  • Selecting 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 DKC61-98RIB Brand Blend demonstrated a consistent yield potential across a wide range of seeding rates in a challenging, water stressed environment.   

  • Contact your local DEKALB® brand seed representative to help determine which corn product and seeding rate best fits your production system.

 
 
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