Soil Science

Introduction

 

Ions from the soil solution may become bonded to the surface of soil colloids. This is referred to as adsorption (NB adsorption not absorption).

Often, the quantity of ions adsorbed greatly exceeds that in the soil solution, so that the adsorbed ions constitute a valuable reserve of plant nutrients.

Adsorbed ions are also less easily leached from the soil by percolating rainwater than are ions in the soil solution, so adsorption is a mechanism by which ions are retained in the soil.

Cations that are loosely bound to a colloid surface by electrostatic attraction may be readily displaced by other cations and are referred to as exchangeable cations.

 

 

 

This content is still being developed, and you may find bugs, spelling mistakes, or other issues. Any feedback can be directed to your unit coordinator, and is greatly appreciated.