Advances in Agronomy, Volume 117, the latest release in this leading reference on agronomy, contains a variety of updates and highlights new advances in the field. Chapters in this new release include Farming Systems Research: Concepts, Design and Methodology, Soil Potassium Fertility and Management Strategies in South Asian Agriculture, Sensing for Characterizing and Monitoring Soil Functions – A Review, Isolation and Fractionation of Organic Matter from Soils and Waters, Tolerance Mechanism and Management Concepts of Iron Toxicity in Rice: A Critical Review, and Smart Sensing and Automated Irrigation for Sustainable Rice Systems: A State of the Art Review. - Includes numerous, timely, state-of-the-art reviews on the latest advancements in agronomy - Features distinguished, well recognized authors from around the world - Builds upon this venerable and iconic review series - Covers the extensive variety and breadth of subject matter in the crop and soil sciences