Little information is available on the effects of irrigated crop management practices on nitrous oxide (N₂O) emissions. Nitrous oxide emissions were monitored from several irrigated cropping system plots receiving N fertilizer rates ranging from 0 to 246 kg N ha^-1 during the 2005 and 2006 growing seasons. Cropping systems included: conventional-till (CT) continuous corn (CC) (CT-CC); No-till (NT) CC (NT-CC); Strip-till CC (ST-CC); NT corn-dry bean (NT-CDb); and NT corn-barley (NT-CB). In 2005, half the N fertilizer rate was subsurface band applied as liquid urea-ammonium nitrate (UAN) at planting to the corn and dry bean plots with the second half of the N rate applied as a surface broadcast polycoated urea (ESN^®, environmentally smart nitrogen produced by Agrium Inc.) in mid-June. All of the UAN was applied at planting on the NT-CB barley plots in 2005. All plots were planted to corn in 2006, with ESN being applied at half the N rate at corn emergence and a second N application as dry urea about the V6-V7 corn growth stage, both banded on the soil surface in the corn row followed by irrigation. N₂O fluxes were measured from each treatment two to three times weekly from planting until crop harvest using static, vented chambers and gas chromatograph analyzer. N₂O emissions were generally greater from the NT-CDb system than the other cropping systems. Tillage system had little effect on N₂O emissions. N₂O emissions increased linearly with increasing N rate both years. The spikes in N₂O emissions following N fertilizer application were much greater with UAN and urea than with ESN^® fertilizer. ESN^® shows potential for reducing N₂O emissions from irrigated cropping systems.