The purpose of this study is to evaluate different rates of pre-plant incorporated UAN and their impact on yield and profitability.

2017 Southern Illinois Soybean Nitrogen Rate Study

This season, we experienced dry conditions after our late May planting date. These dry conditions continued through the months of June, August and September, with July being the exception with a few heavy rain events. As a result of the hot and dry conditions, the soybean nodules were not in the best environment for high productivity. Because of this, we feel that the additional nitrogen (N) helped supplement soybean yields.

Yield in this plot consistently increased with additional applications of N, which told us our soybeans could not produce enough N on their own in 2017 to maximize yield. Even though the plot that received the highest rate of N achieved the highest yield, the best return on investment was achieved with an application of 15 units of N/A. This goes against our multi-year data which has shown that a rate of 30 units of N, on average, is most pr ofitable.

 Fall: Vertical-Till/In-Line Rip, Spring: Vertical-Till | 

 Burndown: 1 qt. Roundup PowerMAX®, 1 qt. Liberty® Pre: 1 qt. Authority® Elite Post: 1 qt. Liberty®, 4 oz. Anthem® Maxx, 4 oz. Section® Three | 