From 2010 to 2019, fertilizer was a major expense in U.S. corn production, accounting for 33 to 44 percent of operating cost. Fertilizer also comprised 16 to 24 percent of the average corn producer’s total costs, which include overhead charges like land costs, machinery depreciation, and farm taxes. Prices for fertilizer have risen since August 2020, with an even more pronounced surge starting in January 2021.