Discussion with Darling Downs growers and consultants identified a lack of local quantitative results on the response of current Bollgard varieties to different irrigation deficits. The aim of this trial was to demonstrate the value of agronomic management to improve crop water use productivity. The assessment of current furrow irrigation performance, enabled a comparison of irrigation and varietal performance, and demonstrated the relative benefits in water use productivity through improved agronomic and/or furrow irrigation management.