A brief history of humus
- The Humic period (before 1840)
- The Mineralist period (1840 - 1940)
- The Ecological period (1940 - 2000)
Humic substances
- What are humic substances?
- Terminology
- Humus and soil organic matter
- Characteristics of humic substances
- Formation and structure of humic substances
Humic products
- What are humic products?
- Survey of Australian companies selling humic products
The claims of humic products
- Research into humic products
- Plant growth and yield
- Claims of physical properties
- Claims of chemical properties
- Claims of biological properties
This e-publication is written primarily for agronomists, soil scientists, consultants and other farm advisors. However, the readable style, explanations and diagrams make it accessible for others with a more rudimentary understanding of the soil and plant services.