Which is the correct sequence of decreasing age of soil?

Answer: Option A

The correct sequence of soils in case of decreasing age of soil, i.e. Ultisol, Altisol, Mollisol and Entisol.

Ultisols mean last are strongly leached, acid forest soils with relatively low native fertility.

Alfisols are clay-enriched subsoil and have relatively high native fertility. “Alf “ refers to aluminium (Al) and iron (Fe).

Mollisols are the soils of grassland ecosystems. They are characterized by a thick, dark surface horizon.

Entisols are soils of recent origin. It is defined as soils that do not show any profile development other than an A horizon.