the primary purpose of weed control is to prevent weeds competing with a crop for nutrients, light and water and so reducing the yield.Weed control often benefits the farmer in other ways, for it brin, umbrohtudest vabanemise meetmed: kultuurtaimede seemne puhastamine umbrohuseemneist, agrotehniliste võtete (nt kõrre koorimine kohe pärast teravilja koristamist) ja herbitsiidide kasutamine. Rohu- ja