HTML University

Science Dept.

Geology and Soils GEO 100 Notes
Cation Exchange

Complete Notes Will Be Posted Before The End Of April!

1. Types of Soil Colloids
   1. Sillicate or Soil Clay Colloids

   2. Hydrous Oxides or Hydroxy Fe and Al

   3. Organic Colloids

2. Cation Exchange
   1. The Negative Charge of the Soil Colloids Attract Cations

   2. For Example:

3. Cation Exchange Capacity

4. Factors Affecting Cation-Exchange Capacity

5. The Importance of Cation-Exchange Capacity