Matthias Stelly

• Diversity of soils in the tropics
• Biological N fixation in forage-livestock systems
• Chemistry in the soil environment
• Crop tolerance to suboptimal land conditions
• Current Concepts for Agronomic Education
• Field soil water regime
• Food for Peace
• Grass tetany
• Histosols, their characteristics, classification, and use
• Moving up the yield curve
• Our Heritage of Land and Water Resources
• Pesticides and Their Effects on Soils and Water