Advances in Agronomy, Volume 168, the latest release in this leading reference on agronomy, contains a variety of updates and highlights new advances in the field. Each chapter is written by an international board of authors. - 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