overgraze

(ōvər grāz′)

transitive verb overgrazed, overgrazing

to allow livestock to graze to excess in (pasture, field, etc.) with results detrimental to the land

See overgraze in American Heritage Dictionary 4

transitive verb o·ver·grazed, o·ver·graz·ing, o·ver·graz·es
To permit animals to graze (vegetational cover) excessively, to the detriment of the vegetation.
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