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Horticulture/Soil and Root Barriers
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Soil and root barriers are used to control weeds or limit the spread of an aggressive plant.
Surface barriers prevent any exposure to light (and sometimes water), or simply prevent plant shoots from reaching light.
Root zone barriers are vertical barriers that prevent the roots of plants from extending into adjacent areas, and are most often used for running plants such as mints and bamboos.
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