The purpose of this study is to evaluate different forms of nitrogen (N) and their impact on yield and profitability.

2017 Central Illinois Corn Nitrogen Form Study - Sidedress

Urea Ammonium Nitrate (UAN) contains three forms of nitrogen (N), two of which are immediately susceptible to loss. Nitrate (NO3-) is susceptible to loss via denitrification and leaching, while the urea (CO(NH2)2) is susceptible to loss via volatilization. Surface applied urea can be susceptible to volatilization loss if not incorporated in a timely matter. Once in the soil, anhydrous ammonia (NH3) almost instantly converts to ammonium (NH4+), which temporarily attaches to the negatively charged clay particles and organic matter. It is safe to assume that there was less N loss with the NH3 application, which resulted in greater supply to meet the increased N demand of this year’s high yield levels.

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

Pre: 1 qt. Atrazine, 3.5 oz. Corvus® Post: 3 oz. Capreno®, 1 qt. Atrazine, 1 qt. Roundup PowerMAX® |

*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.