Nitrogen is a key input in corn production and is essential for a successful and profitable corn crop. It is also expensive and can be difficult to manage.
Genetics may play an important role in the optimum nitrogen rate and timing of application.
This trial was conducted to evaluate the response of several corn products to different nitrogen management strategies.
RESEARCH SITE DETAILS
|Location||Monmouth, IL||Planting Date||6/17/19
|Soil Type||Silt Loam||Harvest Date||10/28/2019|
|Previous Crop||Corn||Potential Yield
|Tillage Type||Conventional||Seeding Rate
- Five different SmartStax® RIB Complete® brand blend corn products were planted at 36,000 seeds/acre:
- Each product was treated with three different nitrogen (N) rates and timings:
- 180 lb N/acre preplant incorporated (PPI)
- 180 lb N/acre PPI followed by 40 lb N/acre side-dressed at V6
- 140 lb N/acre PPI followed by 40 lb N/acre side-dressed at V6
- All nitrogen was applied as 32% UAN solution. A urease inhibitor was added to the side-dress applications.
- Plots were harvested and yields were adjusted to 15% moisture.
UNDERSTANDING THE RESULTS
- Response to nitrogen rate varied among five products.
- The products responded differently depending on the timing of nitrogen applications.
- Return over nitrogen cost generally followed the yield response trend, although in some cases an increase in yield did not result in an increase in net return.
- Many factors, including product genetics, soil type, weather, previous crop, and tillage, can influence the yield response and profitability of a nitrogen application.
- It is important to consider yield goals and nitrogen cost when making management decisions.
- Response to nitrogen can vary from year to year. Consult your local Channel® Seedsman or Technical Agronomist for recommendations for your farm.