noun
also pod·sol·iza·tion ˌ ̷ ̷ˌ ̷ ̷ə̇ˈzāshən
( -s )
: an important process in the formation and modification of certain soils (as pedalfers) especially in humid regions involving principally the leaching of the upper layers of soil and the accumulation of material in the lower layers with a resultant development of characteristic horizons ; specifically : the development of a podzol