What is cation exchange capacity?

How does cation exchange capacity arise in 2:1 clay minerals?

  • Answer:

    Finer-textured soils, those higher in silt or clay, have the ability to adsorb and release plant essential nutrients called cations (ions with positive charge); this ability to hold and release cations is called the Cation Exchange Capacity (CEC) of a soil, and CEC is an important indicator of soil productivity.

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