Respuesta :
The andisols soil order includes the acidic, humus- and clay-leached soils of the boreal forest.
In volcanic ash or other volcanic ejecta, soils called andisols form. They are different from those of other soil orders in that glass and short-range order colloidal weathering products including allophane, imogolite, and ferrihydrite often predominate (minerals). Because of this, andisols have andic characteristics, which are distinct chemical and physical traits include a high capacity to hold water and the power to "fix" (and render unavailable to plants) substantial amounts of phosphorus.
Andisols make up only 1% of the world's ice-free territory, making them the least common soil order. They encompass some fruitful woods in the Pacific Northwest region and make for around 1.7% of the total land area of the United States.
Aquands, Gelands, Cryands, Torrands, Xerands, Vitrands, Ustands, and Udands are the eight suborders that make up the Andisols.
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