1. Soil Science and Management, 4E
Chapter 11
Soil pH and Salinity
T11-1
Soil Science and Management, 4E

2. Soil Science and Management, 4E
Objectives
Describe soil pH and its development
Describe how pH affects plant growth
Tell how to lime or acidify soil
Describe saline and sodic soils
Describe methods to treat saline and sodic soils
T11-2
Soil Science and Management, 4E

3. Soil Science and Management, 4E
Terms to Know
Acid soil
Agricultural lime
Alkaline soil
Basic soil
Buffer test
Buffering
Burned lime
Calcareous soils
Calcitic limestone
Calcium carbonate equivalent
Chemical guarantee
Dolomitic limestone
Fluid lime
Gypsum
Hydrated lime
Marl
Physical guarantee
Saline soil
T11-3
Soil Science and Management, 4E

4. Soil Science and Management, 4E
Terms to Know
Saline-sodic soil
Sodic soils
Sodium adsorption ratio
Soil reaction soluble salt
Total neutralizing power
T11-4
Soil Science and Management, 4E

5. Soil Science and Management, 4E
Soil pH
Figure 11-1
T11-5
Soil Science and Management, 4E

6. Soil Science and Management, 4E
Development of Soil pH
Figure 11-3
T11-6
Soil Science and Management, 4E

7. Soil Science and Management, 4E
Development of Soil pH
Causes of acidity
Figure 11-4
T11-7
Soil Science and Management, 4E

8. Soil Science and Management, 4E
Development of Soil pH
Causes of acidity
Figure 11-5
T11-8
Soil Science and Management, 4E

9. Soil Science and Management, 4E
Effects of pH on Plants
Figure 11-6
T11-9
Soil Science and Management, 4E

10. Soil Science and Management, 4E
Effects of pH on Plants
Effect of pH on nutrient availability
(See Figure 11-7)
pH and element toxicity
pH and soil organisms
T11-10
Soil Science and Management, 4E

11. Soil Science and Management, 4E
Soil pH
Figure 11-7
T11-11
Soil Science and Management, 4E

12. Soil Science and Management, 4E
Liming Soil
Benefits of liming
Liming materials
How lime works (See Figures 11-9, 11-10)
How much lime to apply
Effect of cation exchange capacity on liming (See Figures 11-11, 11-12, 11-13)
Neutralizing power of lime (See Figure 11-14)
Lime fineness (See Figure 11-15)
Lime application
T11-12
Soil Science and Management, 4E

13. Soil Science and Management, 4E
Liming Soil
Figure 11-9
T11-13
Soil Science and Management, 4E

14. Soil Science and Management, 4E
Liming Soil
Figure 11-10
T11-14
Soil Science and Management, 4E

15. Soil Science and Management, 4E
Liming Soil
Figure 11-11
T11-15
Soil Science and Management, 4E

16. Soil Science and Management, 4E
Liming Soil
Figure 11-12
Figure 11-13
T11-16
Soil Science and Management, 4E

17. Soil Science and Management, 4E
Liming Soil
Figure 11-14
T11-17
Soil Science and Management, 4E

18. Soil Science and Management, 4E
Liming Soil
Figure 11-15
T11-18
Soil Science and Management, 4E

19. Soil Science and Management, 4E
Acidifying Soil
Figure 11-17
T11-19
Soil Science and Management, 4E

20. Soil Science and Management, 4E
Soil Salinity
Figure 11-18
T11-20
Soil Science and Management, 4E

21. Soil Science and Management, 4E
Soil Salinity
Saline soils (See Figures 11-19, 11-20, 11-21)
Sodic soils (See Figure 11-23)
Saline-sodic soils
Reclaiming salted soils
Managing salted soils (See Figures 11-24,11-25)
Salted water disposal
T11-21
Soil Science and Management, 4E

22. Soil Science and Management, 4E
Saline Soils
Figure 11-19
T11-22
Soil Science and Management, 4E

23. Soil Science and Management, 4E
Saline Soils
Figure 11-20
T11-23
Soil Science and Management, 4E

24. Soil Science and Management, 4E
Saline Soils
Figure 11-21
T11-24
Soil Science and Management, 4E

25. Soil Science and Management, 4E
Sodic Soils
Figure 11-23
T11-25
Soil Science and Management, 4E

26. Soil Science and Management, 4E
Managing Salted Soils
Figure 11-24
T11-26
Soil Science and Management, 4E

27. Soil Science and Management, 4E
Managing Salted Soils
Figure 11-25
T11-27
Soil Science and Management, 4E

28. Soil Science and Management, 4E
Summary
Soil pH
Alkaline-pH between 7.0 and 10.0
Acid soil-pH between 4.0 and 7.0
Acid soils affect plant growth by lowering the availability of phosphorus and other nutrients
Acid soils treated with lime
Alkaline soils render several micronutrients unavailable and create problems associated with salted soils
Saline soils treated by flooding
T11-28
Soil Science and Management, 4E