_____________ are soils in which more than half of the parent mineral matter is volcanic ash.This soil has a high carbon content so appears very dark in color.

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Andisols are soils that are formed from volcanic ash and have high carbon content, which gives them a dark color. The other options do not fit this description. Oxisols are highly weathered tropical soils, Alfisols are characterized by a clay-enriched subsoil and a relatively high fertility, Entisols are soils that have yet to develop any diagnostic horizons, and Spodosols are acidic soils with a subsoil accumulation of organic matter.

_____________ Are Soils in Which More Than Half of the Parent