Field experiments in undisturbed (no-till) soyabean and maize residue were conducted to evaluate six liquid swine manure application/incorporation methods. The methods were injection with a commercial chisel or sweep, incorporation with tandem disk harrow after broadcast application, broadcast application with no incorporation, injection with a narrow-profile knife, and surface application behind row cleaners. The row cleaner and all injection treatments used spoke-covering wheels. Air samples over the soil surface were obtained immediately following and one day after manure application, and odour level was measured by olfactometry. Residue cover and yield were measured. Incorporation techniques typically reduced odour level by a factor of three to ten as compared with a broadcast application. One day after application, odour was greatly reduced and often indistinguishable from that of untreated soil (no manure application). Residue cover differences among application methods were more pronounced in soyabean residue. Application by the narrow-profile knife, row cleaner, and chisel maintained soyabean residue cover better than other incorporation methods yet limited odour similar to these methods. Although cover was reduced over winter, greater soyabean residue cover remained after planting with fall than with spring manure applications. Differences in odour level and residue cover among methods were less in maize than soyabean residue. All incorporation techniques reduced odour levels, and chisel incorporation maintained maize residue cover after planting similar to broadcast application. For both crops, broadcast application maintained the greatest residue cover but had the highest odour level. Incorporation of manure generally reduced odour, reduced residue cover, increased maize yield, and did not affect soyabean yield.