This project provided for the extension of the Vegetable Irrigation Scheduling System (VISS). The VISS increases irrigation water use efficiency by advising irrigation managers of the specific irrigation needs of crops by accounting for plant growth factor, soil type and local evaporation rates. As a result of the project, VISS has been adopted by managers responsible for an estimated 20% of the water used by the vegetable industry on the Swan Coastal Plain. The knowledge about irrigation management of a much broader range of growers has also improved through the project. Increased water use efficiency is important to securing the ongoing viability of the vegetable industry as it is considered a key limiting resource. The project has also contributed to the more sustainable management of the ground water resource because it has the potential to reduce the incidence of over-watering. Decreased over-watering is associated with reduced leaching of water and nutrients back to the aquifer.