Interactions of all the soil-forming factor are required for an Andisols to form. In general,the most common environment where Andisols form in a humid climate on young parent material under forest vegetation. Similar processes are at the formation of Andisols and other soil orders particularly Spodosols. The end products of weathering for both podzolization and andolization are very similar,namely,Fe and Al associated with organic matter with or without the presence of Si. Andisols are found on all types of landscapes and slope.