Drip irrigation/fertigation ("advanced fertigation", "open hydroponics") is being adopted by the Australian citrus industry. Hardware sophistication and the complexity of management regimes being used vary enormously; from old paradigms applied using modern equipment, through to approaches used overseas, but untested under Australian conditions. Generally, these technologies are being adopted without support. This project aimed to address knowledge gaps and test assumptions regarding the application of modern approaches to the delivery of water and dissolved mineral fertilisers to citrus trees under Australian conditions.