The ‘Optimising Irrigated Grains’ (OIG) project undertook more than 60 individual trials in six crops annually during 2020–22. The trials at two major Irrigated Research Centres – Kerang, Victoria and Finley, southern New South Wales – were undertaken by Field Applied Research (FAR) Australia and the Irrigation Farmers Network (IFN), formerly the Irrigated Cropping Council. The aim of the GRDC-supported research was to identify gaps in knowledge about irrigation potential.