chapter 1 Understanding the Functioning and Management of Soil Systems -- chapter 2 Soil System Management in the Humid and Subhumid Tropics -- chapter 3 Soil System Management in Temperate Regions -- chapter 4 Soil System Management under Arid and Semi-Arid Conditions -- chapter 5 The Soil Habitat and Soil Ecology -- chapter 6 Energy Inputs in Soil Systems -- chapter 7 The Rhizosphere: Contributions of the Soil and#8211; Root Interface to Sustainable Soil Systems -- chapter 8 The Natural Rhizobium and#8211; Cereal Crop Association as an Example of Plant and#8211; Bacteria Interaction -- chapter 9 The Roles of Arbuscular Mycorrihizas in Plant and Soil Health -- chapter 10 Moving Up within the Food Web: Protozoa and Nematodes -- chapter 11 Soil Fauna Impacts on Soil Physical Properties -- chapter 12 Biological Nitrogen Fixation in Agroecosystems and in Plant Roots -- chapter 13 Enhancing Phosphorus Availability in Low-Fertility Soils -- chapter 14 Phytohormones: Microbial Production and Applications -- chapter 15 Crop Genetic Responses to Management:Evidence of Root and#8211; Shoot Communication -- chapter 16 Allelopathy and Its Influence in Soil Systems -- chapter 17 Animals as Part of Soil Systems -- chapter 18 Integrated Soil Fertility Management in Africa: From Knowledge to Implementation -- chapter 19 Managing Soil Fertility and Nutrient Cycles through Fertilizer Trees in Southern Africa -- chapter 20 Biological Soil Fertility Management for Tree-Crop Agroforestry -- chapter 21 Restoring Productivity to Degraded Pasture Lands in the Amazon through Agroforestry Practices -- chapter 22 Direct-Seeded Tropical Soil Systems with Permanent Soil Cover: Learning from Brazilian Experience -- chapter 23 Restoration of Acid Soil Systems through Agroecological Management -- chapter 24 Conservation Agriculture and Its Applications in South Asia -- chapter 25 Managing Soil Fertility on Small Family Farms in African Drylands -- chapter 26 Restoring Soil Fertility in Semi-Arid West Africa: Assessment of an Indigenous Technology -- chapter 27 Leguminous Biological Nitrogen Fixation in Sustainable Tropical Agroecosystems -- chapter 28 Soil Biological Contributions to the System of Rice Intensification -- chapter 29 Contributions of Managed Fallows to Soil Fertility Recovery -- chapter 30 Green Manure/Cover Crops for Recuperating Soils and Maintaining Soil Fertility in the Tropics -- chapter 31 Compost and Vermicompost as Amendments Promoting Soil Health -- chapter 32 Practical Applications of Bacterial Biofertilizers and Biostimulators -- chapter 33 Inoculation and Management of Mycorrhizal Fungi within Tropical Agroecosystems -- chapter 34 Trichoderma: An Ally in the Quest for Soil System Sustainability -- chapter 35 Evaluation of Crop Production Systems Based on Locally Available Biological Inputs -- chapter 36 Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics -- chapter 37 Improving Phosphorus Fertility in Tropical Soils through Biological Interventions -- chapter 38 Profile Modification as a Means of Soil Improvement: Promoting Root Health through Deep Tillage -- chapter 39 Rhizosphere Management as Part of Intercropping and Rice–Wheat Rotation Systems -- chapter 40 Managing Polycropping to Enhance Soil System Productivity: A Case Study from Africa -- chapter 41 Effects of Soil and Plant Management on Crop Pests and Diseases -- chapter 42 Revegetating Inert Soils with the Use of Microbes -- chapter 43 Impacts of Climate on Soil Systems and of Soil Systems on Climate -- chapter 44 Economic and Policy Contexts for the Biological Management of Soil Fertility -- chapter 45 Village-Level Production and Use of Biocontrol Agents and Biofertilizers -- chapter 46 Measuring and Assessing Soil Biological Properties -- chapter 47 Approaches to Monitoring Soil Systems -- chapter 48 Modeling Possibilities for the Assessment of Soil Systems -- chapter 49 Opportunities for Overcoming Productivity Constraints with Biologically-Based Approaches -- chapter 50 Issues for More Sustainable Soil System Management.