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.

2016 Multi-Location Corn Population vs. Nitrogen Rate Study - 30 in. Rows

Across all locations and hybrids, XL® 5665AMX™*brand yield increased with the higher rates of nitrogen (N), by approximately 4.5 Bu./A. compared to the control. As recommended, XL® 5665AMX™*brand produced its best yield at the lowest selected population, while BECK 5829A4brand was stable across all three populations. Return on investment was greatest for both hybrids at 190 units of N/A. With current commodity prices, the increase in yield did not provide enough return to cover the additional costs. The results of this multi-location study demonstrate that hybrid selection, population and N rate are all key to maximizing return. When deciding on the optimum N rate for your farm, rotation, hybrid, soil type, and N cost should all be factored into your decision. A good N rate to target for rotated corn should be between 180 and 190 units/A. and between 200 and 220 units/A. for corn-after-corn. Again, these are target rates. If you have the ability to split apply your N, these rates can be adjusted up or down based on weather events, yield potential, and N costs.

2021 Iowa Soybean REPLANT THRESHOLD STUDY 30 IN. ROWS

2021 Iowa Corn Thin Stand Management Study - Fungicide Response

Population vs. Nitrogen Rate Study

2016 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.