1) Volcanic soil
Found on
https://www.crosswordclues.com/clue/andisol
In USDA soil taxonomy, Andisols are soils formed in volcanic ash and defined as soils containing high proportions of glass and amorphous colloidal materials, including allophane, imogolite and ferrihydrite. In the FAO soil classification, Andisols are known as Andosols. Because they are generally quite young, Andisols typically are very fertile ex...
Found on
http://en.wikipedia.org/wiki/Andisol
one of the 12 soil orders in the U.S. Soil Taxonomy. Andisols are defined by the single property of having volcanic-ash parent material. Although ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/a/71
No exact match found.
