Increased pressures are being placed on irrigators in Australia to maximise their water use efficiency. This has in turn highlighted the need for more focused research and extension on water management. The HydroLOGIC irrigation management system has been developed to provide information for irrigation decisions. The system provides a range of information to assist with the effective and timely application of irrigations for furrow irrigated cotton crops. Uniquely, the software has the ability to evaluate the consequences of different irrigation strategies on daily crop growth, yield and water use, using a range of simple plant and soil moisture measurements. HydroLOGIC especially offers opportunities for optimising irrigation management in limited water situations, where understanding the consequence of different irrigation strategies become even more important to productivity. Field experiments conducted dunno the 2002-03 cotton growing season demonstrated that HydroLOGIC could achieve above average yields and water use efficiency (Richards and Bange, 2003). This paper presents the results of a HydroLOGIC experiment in 2003-04, which aims to further demonstrate the &#39value&#39 of HydroLOGIC in improving water use efficiency