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Seaweed is collected from the beaches in Jersey to spread on the fields. Seaweed contains all the trace elements and plant nutrients necessary for healthy crops, in addition the alginates in Brown seaweeds (Phaeophyta) are reputed to be an excellent soil conditioner. In Jersey the special flavour of their new potatoes is thought to derive from the seaweed they spread on their fields locally known as Vraic (Wrack). The seaweed is also thought to suppress Eelworm in the potato crop and has been collected and spread by the Jersey farmers since the 12th century, when every farmer had the right to collect seaweed from the beach.