Advances in Agronomy, Volume 159, the latest release in this leading reference on agronomy, contains a variety of updates, including specific chapters on the Environmental Behavior of Glyphosate in Soil, Agriculture Contingency Plans for Managing Weather Aberrations and Extreme Climate Events: Development, Implementation and Impacts in India, Unmanned Aircraft Systems for Precision Weed Management Applications: Prospects and Challenges, Ratoon Rice Technology: A Green and Resource-Efficient Way for Rice Production, Growth Characteristics of Winter Wheat in China Based on GDD Comprehensive and Quantitative Analysis of Growth Characteristics of Winter Wheat in China Based on Growing Degree Days, and more.