Journal ArticleSubsurface drainage reduces the amount and interannual variability of optimum nitrogen fertilizer input to maize cropping systems in southeast Iowa, USAMaas, Ellen D.v.L.; Archontoulis, Sotirios V.; Helmers, Matthew J.; Iqbal, Javed; Pederson, Carl H.; Poffenbarger, Hanna J.; TeBockhorst, Kristina J.; Castellano, Michael J.2022-11-0110374123Field Crops Research288C1086630378-4290https://doi.org/10.1016/j.fcr.2022.1086632125484National Science Foundation