Recent publication in Agronomy Journal
A recent Agronomy Journal paper examines how anhydrous ammonia application timing and nitrogen rate affect corn production and profitability. The study compared fall and spring applications at 19 Central Illinois sites from 2013 to 2020.
Across sites, spring application had a lower average economic optimum nitrogen rate. Average yield and net return to nitrogen at the economic optimum did not differ significantly between timings, and responses varied by site.
Link, B. A., Schaefer, D. J., Nafziger, E. D., & Jones, J. D. (2026). Effects of nitrogen rate and timing applied as anhydrous ammonia on corn production and profitability in Central Illinois. Agronomy Journal, 118, e70540.