DEFINITION OF SOIL ORGANIC MATTER

By Jerzy Weber

1. Definition of humic substances
2. Function of organic matter in soil
3. Formation of humic substances
4. Properties of humic substances
5. Properties of non-humic substances
6. Humic substances complexes with mineral components
7. Determination of content of humic substances
8. Extraction of humic substances
9. Organic forms of soil nitrogen
10. Organic forms of soil phosphorus
11. Types of humus in soils
12. Humus content in soil


13. References

13. References

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