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Interactions Among Soil Components:

Soil Acidity

4.1 Common pH ranges in soils  
 4.2 Role of Aluminum in soil acidity  
 4.3 Types of Soil Acidity

4.1 Common pH ranges in soils  

Range of pH Values Typical for Various Types of Soil

 

 

4.2 Role of Aluminum in soil acidity

Aluminum ions are released into soil solution during mineral weathering. Al ions react with water (i.e. they hydrolyze) and form H+ ions.  For this reason Al3+ and H+ together are considered acid cations.

 

4.3 Types of Soil Acidity

Illustration of the Equilibrium Relationship among Residual, Exchangeable, and Active Acidity in a Soil with Organic and Mineral colloids.

Source: Centre for Teaching, Learning and Technology, UBC

 

Faculty of Land and Food Systems
THE UNIVERSITY OF BRITISH COLUMBIA