is the movement of chemical in the upper layers of soil into lower layers or into groundwater ...........

General Studies (CHSL) Environment and Ecology

__________ is the movement of chemical in the upper layers of soil into lower layers or into groundwater by being dissolved in water.

infiltration

salinisation

eutrophication

leaching

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Explanation:

Leaching is movement of a herbicide with water, usually, but not always, downward. It is of environmental concern because of the possibility of offsite movement and groundwater contamination. It can determine an herbicide's effectiveness by moving it into or out of the zone of action.