Corn Product Performance Influenced by Seeding and Irrigation Rate

Trial Overview

  • Managing irrigated corn production is intensive and demanding as farmers try to extract value out of every input. 
  • There are many interactions in the field that impact yield potential, including seeding rate, irrigation environment, and corn product. This study was designed to evaluate the interaction of these factors on the yield potential of different corn products.

Research Objective

  • Evaluate the effect of different seeding rates under full and limited irrigation on corn product yield potential to aid producers in selecting the optimal corn products and planting populations for the irrigation environment on their farm.
Soil Type
Previous Crop
Tillage Type
Planting Date
Harvest Date
Potential Yield
Planting Rate
Gothenburg, NE
Hord silt loam
240 bu/acre
24K, 30K, 36K, and 42K

Site Notes:

21 corn products were tested with RM ranging from 105 to 116.Two irrigation rates were used: 
          - 100% full irrigation (FI) to meet the evapotranspiration demands of the crop (totaling 6 inches) 
          - 50% of FI (totaling 3 inches)
Irrigation treatments were applied using a variable rate irrigation system.The study design was a split-split plot with irrigation as the whole plot, corn product as the first split, and planting density as the second split.Watermark granular matrix soil moisture sensors were installed before tassel to track soil moisture.Weeds were controlled uniformly across the study and no fungicides or insecticides were applied.

Understanding the Results

  • There was a general trend across corn products for higher yields at the 36,000 or 42,000 seeds/acre seeding rates. 
              - For the 100% FI treatment, 42,000 seeds/acre provided the highest yield potential. 
              - For the 50% FI treatment, 36,000 seeds/acre provided the highest yield potential.
  • The response of some corn products differed from the generalized trend. For example, the 114RM-B product yielded the highest at 30,000 seeds/acre at both irrigation rates.

What Does This Mean for Your Farm

  • Farmers should select corn products that have shown good performance in the seeding rate and irrigation environments on their farm.
  • Producers should work with their local seed sales team to identify how their branded corn products performed in this study.