Performance of 90-100 RM Corn Products Grown in 110-115 RM Regions

Trial Overview

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  • Concerns over potential water shortages and13;10;water restrictions in some corn growing areas of the western Great Plains have13;10;prompted some farmers to look at alternatives to full-season corn production13;10;with irrigation.
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  • One strategy for dealing with limited water13;10;availability is to use a shorter relative maturity (RM) corn product. 
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  • 13;10; Farmers considering this strategy will need to13;10; know what yield levels can be expected from corn products that are 10-2013;10; day RM earlier than the products that are widely grown in that region.13;10;
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  • 13;10; This trial took place over three seasons (from13;10; 2014-2016) at 5-6 locations per year.13;10;
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Research Objective

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  • The objective of this study was13;10;to compare the yield performance of several 90-100 RM corn products grown in13;10;regions that typically grow 110-115 RM corn products. 
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13;10;Location 13;10;
13;10;Soil Type 13;10;
13;10;Previous Crop 13;10;
13;10;Tillage Type 13;10;
13;10;Planting Date 13;10;
13;10;Harvest Date 13;10;
13;10;Potential Yield 13;10;
13;10;Planting Rate 13;10;
Bruning, NE
Silt loam
Corn
Conventional
05/06/2016
10/16/2016
240 bu/acre
32,000 seeds/acre
Battle Creek, NE
Loamy sand
Corn
Conventional
05/24/2016
10/26/2016
200 bu/acre
33,000 seeds/acre
Gothenburg, NE
Silt loam
Soybean
Strip Till
04/25/2016
10/20/2016
260 bu/acre
34,000 seeds/acre
Colby, KS
Silt loam
Sunflower
Strip Till
05/08/2016
10/13/2016
250 bu/acre
34,000 seeds/acre
Bethune, CO
Silt loam
Soybean
Strip Till
05/15/2016
10/17/2016
240 bu/acre
34,000 seeds/acre
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13;10; Site Notes:13;10;

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Six different corn products13;10;with RM ranging from 93-108 were grown along with a 110 RM corn product as a13;10;control (check) at each location. All sites were irrigated to13;10;meet ET demands, and normal planting dates were targeted. Trial entries were13;10;replicated three times at all sites. 
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Understanding the Results

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Table 1. Average Yields across Locations (*also used as a check but not13;10;grown at all locations)
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  • The 93-99 RM corn products consistently yielded13;10;81-88% of the yield of the 110 RM check during the course of this trial.
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  • This data supports a similar study conducted by13;10;Monsanto in 2005-2007 in which similar trends were found.
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What Does This Mean for Your Farm

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  • Based on the results of this study, farmers can13;10;expect approximately 2 bu/acre less yield potential per RM day when planting13;10;corn products with an earlier RM than the corn products they would normally13;10;plant in 110-115 RM regions.
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  • A previous study conducted at Kansas State University13;10;has indicated that as much as 3 inches less water may be required for 95 RM corn13;10;products compared to 110-115 RM corn products.
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  • Farmers must consider the economics of the13;10;potential water savings and potential yield penalties with earlier maturing13;10;products when choosing products for their field.
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