Effective irigation scheduling and water delivery/application systems are integral components of irrigation management. Following severe droughts in southern Queensland during 1987 and 88, which severely depleted groundwater supplies, there was a strong push by producers to increase irrigation efficiencies in vegetable industries. In response, this project to develop practical irrigation scheduling systems for shallow-rooted vegetables were submitted to and jointly funded by QLD Fruit and Vegetables Growers (QFVG) and the Horticultural Research and Development Corporation (HRDC). This project aimed to compare methods for estimating crop water needs and to determine irrigation requirements for vegetable production with a sub-objective of comparing irrigation efficiency and crop performance under sprinkler and drip systems.