The book traces the links between nutrient, pesticide, and irrigation water use in agricultural production and the effects on water quality and pinpoints the most promising ways to improve both input management and water qualit>c This publication seeks to contribute to exploring current issues in science, technology and innovation, with particular emphasis on their impact on developing countries. We hope that this book can create a useful reference for improvement of the insight in the issues at stake and can contribute to water quality for agriculture and food security.