Editing Oxisol (section)

==Formation==
The main processes of [[soil formation]] of oxisols are [[weathering]], [[humification]] and [[pedoturbation]] due to animals. These processes produce the characteristic [[soil profile]]. They are defined as soils containing ''at all depths'' no more than ten percent weatherable [[minerals]], and low [[cation exchange capacity]]. Oxisols are always a red or yellowish color, due to the high concentration of [[iron]](III) and [[aluminium]] [[oxides]] and [[hydroxide]]s. They also contain [[quartz]] and [[kaolin]], plus small amounts of other [[clay minerals]] and [[organic matter]].