- Plant Analysis Handbook: A Practical Sampling, Preparation, Analysis, and Interpretation Guide
- The Fertile Triangle: The Interrelationship of Air, Water, and Nutrients in Maximizing Soil Productivity
- Untersuchung von Energieeinsparm�glichkeiten an einem Bestandsgeb�ude
- Life-Cycle Investing
- Soils: The Place of Organic Matter in Sustaining Soils and Their Productivity