1. Soil Solid Phase Chapter 1

2. Chapter Sections 1.1 Introduction 1.2 Soil phases 1.3 Soil texture
1.4 Soil mineralogy
1.5 Soil structure
1.6 Summary
1.7 Derivations

3. 1.1 Introduction

4. 1.1 Soil phases
1.1
1.2
1.3
1.4
1.5

5. 1.1 Soil Phases
1.6
1.7
1.8
1.9

6. Example 1.1

7. 1.3 Soil Texture

8. 1.3 Soil Texture

9. 1.3 Soil Texture

10. 1.3 Soil Texture
1.10
1.11

11. Example 1.2

12. 2.1 Properties of Bulk Water

13. Example 1.2

14. Example 1.2

15. 1.4 Soil Mineralogy
TABLE 1.1
Approximate charge characteristics of soil colloids (Brady and Weil, 2008)
Colloid Type
CEC
AEC
cmolc kg-1
Organic matter
200
Smectite
100
Vermiculite
150
Fine-grained micas 30
Chlorite
Kaolinite 8 2
Aluminum oxide 4 5
Iron oxide
Allophane 15

16. 1.4 Soil Mineralogy
1.12
1.13

17. 1.4 Soil Mineralogy
TABLE 1.2
Specific surface area range for selected colloids (Skopp, 2000)
Colloid s
m2 g-1
Kaolinite
15-20
Illite
80-100
Bentonite
Montmorillonite
Crystalline iron oxides
Amorphous iron oxides
Organic matter
TABLE 1.3
Specific surface area for bulk soils (Skopp, 2000)
Soil Textural Class s
m2 g-1
Sands
<10
loams and silt loams
5-20
Clay loams
15-40
Clays
>25

18. Example 1.3

19. 1.5 Soil Structure

20. 1.5 Soil Structure

21. 1.5 Soil Structure: Shape

22. 1.5 Soil Structure: Shape

23. 1.5 Soil Structure: Shape

24. 1.5 Soil Structure: Shape

25. 1.5 Soil Structure: Size & Grade

26. 1.5 Soil Structure: Size

27. 1.5 Soil Structure

28. 1.5 Soil Structure

29. 1.7 Derivations

30. 1.7 Derivations

31. 1.7 Derivations