Preface. - 1. Basic Ecological Concepts in Agroecosystems. - 1. Agroecology: Researching the Ecological Basis for Sustainable Agriculture. - 2. Two Examples of Natural Enemy Augmentation: A Consequence of Crop Diversification. - 3. An Evaluation of Ants as Possible Candidates for Biological Control in Tropical Annual Agroecosystems. - 4. Cropping Systems Insect Movement and the Spread of Insect-Transmitted Diseases in Crops. - 5. Diversification of Agroecosystems for Insect Pest Regulation: Experiments with Collards. - 6. Reduction of Damping-Off Disease in Soils from Indigenous Mexican Agroecosystems. - 7. The Role of Allelopathy in Agroecosystems: Studies from Tropical Taiwan. - 8. Nutrient Mobility in a Shifting Cultivation System Belize Central America. - 9. Low-Input Ideotypes. - 10. An Ecological Approach to Reducing External Inputs Through the Use of Intercropping. - 11. Integrating Trees into Agriculture: The Home Garden Agroecosystem as an Example of Agroforestry in the Tropics. - 12. The Influence of Trees in Selected Agroecosystems in Mexico. - 13. Tree Improvement from the Ground Up: The Potential for a Select Microbial Inocula in Forestry. - 14. Variability Stability and Risk in Intercropping: Some Theoretical Explorations. - 2. Agroecosystem Design and Management. - 15. Reducing the Risk: Some Indications Regarding Pre-Hispanic Wetland Agricultural Intensification from Contemporary Use of a Wetland/Terra Firma Boundary Zone in Central Veracruz. - 16. Agricultural Systems of the Northeastern Hill Region of India. - 17. The Impact of Agrohydrological Management on Water Nutrients and Fertilizers in the Environment of the Netherlands. - 18. Technological Changes in Energy Use in U. S. Agricultural Production. - 19. Energy Flow in Agroecosystems of Northeast China. - 20. Threats to Sustainability in Intensified Agricultural Systems: Analysis and Implications for Management. - 21. Quantifying the Agroecological Component of Sustainable Agriculture: A Goal. Language: English