Impact of Irrigation Environment on Corn Product Performance

Trial Overview

  • There are many different irrigation environments across the Great Plains. In some areas, water applications are restricted by pumping capacity or by allocation, but there are still many fully-irrigated fields.
  • Farmers need information on how corn products perform in various irrigation environments to help them choose the best products for their fields.

Research Objective

  • This study was set up to evaluate corn product performance in various irrigation environments.
Soil Type
Previous Crop
Tillage Type
Planting Date
Harvest Date
Potential Yield
Planting Rate
Gothenburg, NE
Hord silt loam
240 bu/acre
34,000 seeds/acre

Site Notes:

Four irrigation rates were used: 100% full irrigation (FI) to meet the irrigation needs of the crop, 70%, 50%, and 20% FI. The irrigation rates were achieved using a variable rate irrigation system installed on a linear move overhead sprinkler system.Rainfall amounted to: May 2.53 in., June 0.75 in., July 1.52 in., August 3.63 in., and September 2.4 in., totaling 10.83 in.15 corn products were tested with RM ranging from 101 to 116.The study design was a split plot with irrigation rate as the whole plot with two replications. Weeds were uniformly controlled across the study and no insecticides or fungicides were applied.



Understanding the Results

Table 1. Irrigation treatments
  • As expected, corn product performance was impacted by irrigation rate with higher yields observed under 100% FI, indicating that water stress reduced yield.
              - On average, 70% FI yielded 93% of the 100% FI treatment.
              - On average, 50% FI yielded 89% of the 100% FI treatment.
              - On average, 20% FI yielded 75% of the 100% FI treatment.
  • The corn products that provided consistent performance across irrigation treatments were 105RM-A, 110RM-B, and 113RM-A (highlighted in Table 2).
  • Corn product 106RM-A had consistent performance at the 70% and 50% FI treatments, but yield decreased significantly at the 20% FI treatment when compared to 100% FI (highlighted in Table 2).
  • Corn product 116RM had a high yield at the 100% FI treatment, but had reduced yields at the other irrigation treatments. This product should be well suited for fully-irrigated ground.   

What Does This Mean for Your Farm

  • As new corn products come to the market, this type of research provides valuable information on the correct placement of these products to provide the best opportunity for a successful crop.
  • Branded information to identify these corn products can be acquired from your local Monsanto seed sales team.