ch. 1. Types of plant roots, their measurements, and associations with yield -- ch. 2. Uptake of nutrients by roots -- ch. 3. Absorption of water by roots -- ch. 4. Rhizosphere chemistry -- ch. 5. The rhizosphere chemistry of flooded rice -- ch. 6. Mycorrhizal associations in the rhizosphere -- ch. 7. Effects of mineral nutrition on root growth of crop plants -- ch. 8. Ecophysiology of major root crops -- ch. 9. Management strategies for maximizing root systems.