Terra fusca
Encyclopedia
Terra Fusca is a limestone based soil
Soil
Soil is a natural body consisting of layers of mineral constituents of variable thicknesses, which differ from the parent materials in their morphological, physical, chemical, and mineralogical characteristics...

 (similar to Terra Rosca). It is a very fertile soil for agriculture
Agriculture
Agriculture is the cultivation of animals, plants, fungi and other life forms for food, fiber, and other products used to sustain life. Agriculture was the key implement in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that nurtured the...

. It is generally found in cooler climates, such as a Mediterranean or European climate.http://www.fao.org/ag/AGL/agll/wrb/doc/georgia.rtf It is also referred to as Cromi-calceric cambisol.http://www.freidok.uni-freiburg.de/volltexte/86/pdf/86_1.pdf
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