Do I need to increase my nitrogen rate when increasing corn populations?

2017 Multi-Location Corn Population vs. Nitrogen Rate Study - 30 in. Rows

Across three, PFR locations over two years we have observed regardless of hybrid or planted population, 190 units N/A. was the economic optimum nitrogen rate in 30 inch rows. This was over a heavy year of nitrogen mineralization (2016) as well as a year which was high in rainfall and nitrogen leaching (2017).

The purpose of this study is to to evaluate different nitrogen (N) rates in 30 in. rows, applied to multiple populations, to determine the Economic Optimum Nitrogen Rate (EONR) and Economic Optimum Seeding Rate (EOSR) combination.

For the second year in a row, our multi-location data showed an EONR of 190 units and an EOSR of 30,000 seeds/A., regardless of the hybrid’s typical nitrogen (N) response or response to population.

Many of the net return results that we saw in this study recect current commodity and input prices. Both the high-response-to-population hybrid, XL® 5828AMX™*brand, and the high-response-to-N hybrid, XL® 5665AMX™*brand, increased yield when their respective change in management practice was increased. Unfortunately, there was not enough of a yield response to overcome the increased cost of production.

Jon Skinner | Field Agronomist

2017 MULTI-LOCATION PHOENIX® 5832A3**brand NET RETURN

2017 MULTI-LOCATION XL® 6158AM™*brand NET RETURN

*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.

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Population vs. Nitrogen Rate Study

2017 Multi-location Corn Population Vs. Nitrogen Rate Study - 30 In. Rows

Use whenever the name of a PFR Study mentions Population, Planting Date, Planting Depth, Planting Speed, Planting Film, Singulation, Talc, Row Width, Soil Amendment, Pre-Emerge, Pre-Emergent, Delayed Planting, Crop Rotation, Water Management, Tire Pressure, Strip Cropping, Herbicide Additive, and/or Maturity.

Pre-Plant

Use whenever the name of a PFR Study mentions Sidedress, Nitrogen Rate, 2x2x2, and/or Nitrogen.