The purpose of this study is to determine the Economic Optimum Nitrogen Rate (EONR), which is the rate of nitrogen (N) that maximizes profitability. All entries received 30 units of N as UAN in a 2x2 application at planting. This was followed by a sidedress application of UAN at the V3 growth stage, meeting the total amount of N for each treatment.

2017 Iowa Corn Nitrogen Rate Study - Corn After Soybeans

This year the N efficient hybrid had an EONR of 175 units/A., while the higher N response hybrid was the most profitable at 225 units/A. Looking at the two-year EONR analysis, the optimum return is between 210 to 220 units/A. Further testing will continue to improve our understanding of N management and optimize return on your N investment.

 Fall: In-Line Rip/Chisel, Spring: Field Cultivation | 

 Pre: 3.5 oz. Corvus®, 1 lb. Atrazine Post: 3 oz. Capreno®, 1 lb. Atrazine | 

2021 Iowa Soybean SINGULATION STUDY 15 IN. ROWS

2021 Iowa Soybean STARTER FERTILIZER STUDY 2X2X2

Nitrogen Rate Study

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