In viticulture irrigation is primarily used for the purposes of quality assurance and yield stabilization. Irrigation can only be carried out in an economically and ecologically sensible way if it is oriented on the crop water requirement of grapes. In a four-year project (2003-2006) new systems of irrigation and fertilization management were implemented in several vineyards in Seewinkel. The project aimed at the optimal supply of the grapes with water and nutrients in combination with a sensible, economical use of resources (water, energy). Soil water content was measured with FDR sensors. The data were recorded and stored in several logger stations. Via a modem the soil water measurement data were transferred, and irrigation events operated. The objective of this work was to optimize irrigation through strategic management. Conventional drip irrigation as well as a newly installed subsurface drip irrigation system, which applies the water directly to the root zone of the plants, was used for irrigation. This helps to increase the efficiency of water uptake and to optimize the use of water. For nutrition management several soil samples and leaf samples were taken during the vegetation period and analyzed in a laboratory. These analyses were used as a basis for recommendations on fertilization. The irrigation and monitoring systems deployed provided several opportunities to optimize the water and nutrient supply of the plants. However, the full potential could not be reached due to difficulties in the practical implementation.