As populations continue to grow in tropical countries, there is an ever increasing pressure to produce more food from less land, while at the same time maintaining the quality of the environment. This textbook integrates research in agronomy, physiology, environmental physics and soil science to provide a framework for analyzing practical problems associated with crop production in tropical environments. The impact of essential resources, such as solar radiation and water, are discussed and research findings are used to illustrate solutions to real challenges. The book will serve as a core textbook for advanced undergraduate courses in agronomy.