This corn intensification study was conducted under subsurface drip irrigation (SDI) from 2017 to 2021 at the Kansas State University Northwest Research-Extension Center near Colby, KS. Two hybrids (Pioneer 1151 and Pioneer 11197) were grown with advanced fertilization three plant densities (42,000, 38,000, 34,000 plants/a) using levels (115, 100, or 85% of calculated well-watered ET minus rain...