Foreword. Part I. Environment and natural resources. 1. Dry climates and their world distribution. 2. Climatic factors and their effect on crop production. 3. Soils of the dry zones. 4. Water resources, conservation and development. Part II. Crops under moisture stress. 5. Crop-water relations. 6. Plant adaptations to moisture stress. 7. Crop introduction and breeding for drought-prone areas. Part III. Land use and farming systems. 8. Agricultural systems in dry regions and their evolution. 9. Sustainable agriculture in dry regions. Part IV. Soil and crop management. 10. Soil fertility. 11. Mineral plant nutrition and fertilizer use. 12. Irrigation: principles and practice. 13. The maintenance of a permanent irrigation agriculture. 14. Tillage. 15. Plant population and planting geometries. 16. Crop sequences and associations. Part V. Crop protection. 17. Weeds and their control. 18. Insects and other plant pests. 19. Plant diseases. Index.