part Part I Ecological Interactions: An Overview -- chapter 1 Ecological Interactions in Agroforestry: An Overview -- chapter 2 Tree-Crop Interactions: Lessons from Temperate Alley-Cropping Systems -- chapter 3 Allelopathic Tree-Crop Interactions under Agroforestry Systems -- chapter 4 Approaches to Tree-Environment-Crop Interactions -- chapter 5 Weeds, Diseases, Insect Pests, and Tri-Trophic Interactions in Tropical Agroforestry -- chapter 6 Ecologically Based Pest Management in Agroforestry Systems -- chapter 7 A Case Study on the Potential of Contour Hedgerow Intercropping for Sustainable Crop Production on Sloping Highlands in Humid and Subhumid Zones of Sri Lanka -- part Part II The Belowground Ecology -- chapter 8 Belowground Interactions in Tree-Crop Agroforestry: Need for a New Approach -- chapter 9 Tree-Grass Interactions and Water Use in Silvopastoral Systems in N.W. Patagonia -- chapter 10 Litter Dynamics in Plantation and Agroforestry Systems of the Tropics-A Review of Observations and Methods -- chapter 11 Developments in the Research of the Potential of Agroforestry for Sustaining Soil Fertility in Zimbabwe -- chapter 12 Soil Sustainability in Agroforestry Systems: Experiences on Impacts of Trees on Soil Fertility from a Humid Tropical Site -- chapter 13 Root Competition for Water between Trees and Grass in a Silvopastoral Plot of 10 Year Old Prunus avium -- part Part III Models in Agroforestry -- chapter 14 Relationship of Three-Dimensional Structure to Shelterbelt Function: A Theoretical Hypothesis -- chapter 15 Modeling a Field Shelterbelt System with the Shelterbelt Agroforestry Modeling System -- part Part IV Ecological Economics -- chapter 16 Social and Economic Implications of Agroforestry for Rural Economic Development in Temperate Regions -- chapter 17 Forest Patches in Northeast Luzon (the Philippines): Their Status, Role, and Perspectives for Conservation in Integrated Land-Use Systems -- chapter 18 Adoption, Profitability, Impacts, and Scaling up of Agroforestry Technologies in Southern African Countries -- chapter 19 Pasture Production and Tree Growth in Agroforestry Systems of Northwest Spain.