The purpose of this study is to evaluate various nitrogen (N) application timings and their effects on N uptake and yield. Each treatment in this study received a total of 190 units of N as UAN.

2018 Central Illinois Corn Nitrogen Timing Study

Split applications of nitrogen (N) can be very important for corn production in years when weather conditions promote loss. In 2018, our total rainfall at the Central Illinois PFR site was below average for most of the growing season. With that said, results from this study showed that an extra in-season split application of N between the V7 and VT growth stages through the 360 Y-DROP® system did not provide an advantage over side-dressed N at the V3 growth stage with a coulter and spray nozzle. This is most likely due to the drier rainfall pattern. Our three-year data suggests that most of the treatments in this study provide similar results, with the greatest advantage from an extra in-season split application was in 2017 when rainfall was above average.

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