Up By Roots: Healthy Soils and Trees in the Built Environment Book by James Urban. The necessary knowledge and tools required for planting and maintaining city trees are presented in depth in this guide intended for public officials, design professionals, interested citizens, developers, and arborists who wish to increase the quality and value of the urban forest. This highly relevant manual discusses guidance in policy decision-making, and studies the basic science of soils, trees, and soil condition analysis. Additionally, thorough instruction is provided for applying soil-based, tree-based, and management-based strategies in the day-to-day, tree-by-tree development of large, healthy trees that help sustain a healthier, more inviting urban environment. (479 pp., soft cover)