Dryland farming is a major export earner for many temperate-zone countries - from Southern Europe, Africa, Asia and the Americas. Yet it continues to degrade a countries natural resources. Effects are not restricted to the land - changes in water quality can reduce the potential uses of water and bring about catastrophic changes in both freshwater and coastal ecosystems. This book provides a comprehensive technical overview of the relationships between dryland farming systems and catchment land and water quality in Australia, and integrates it in a whole system framework.