Agroforestry research is central to developing methods for the sustainable use of natural renewable resources, evolving to address the needs of the coming century. It is now necessary to consolidate the scientific gains now being made in process-oriented research and to develop a policy framework to encourage the adoption of sustainable land use practices. Agroforestry plays an important role in conserving forest resources, reducing the need for deforestation. Further, if `forest' is broadly defined as tree cover, agroforestry will also increase the proportion of woody biomass in farming landscapes. The papers selected for inclusion in Agroforestry: Science, Policy, and Practice establish agroforestry as an interdisciplinary science focused on the practical imperative of assisting farmers, forest dwellers and landscape-level planners to achieve sustainable food, fuel and timber production into the 21st century.

Despite decades of research into the nature and treatment of stuttering, the causes and underlying mechanisms of it are still not well understood. In this unique and comprehensive overview of the numerous theories and models which seek to understand and explain stuttering, the authors of Theoretical Issues in Stuttering provide an invaluable account. Covering an impressive range of topics including past and current theories of stuttering, this edition provides the reader with an updated evaluation of the literature on the subject of stuttering alongside exploring the evolution of new theories. Placing each within the relevant historical context, the authors explore the contribution of theory to both understanding and managing stuttering. Theoretical Issues in Stuttering is a critical account of the models and theories which surround the subject of stuttering, aiming to act as a key resource for students of speech-language pathology as well as lecturers, clinicians and researchers within the field.