Alun Lewis reports on new research which suggests that woad, the dye used by ancient Britons, could become a crop plant for the 21st century.
Producer Deborah Cohen. Rptd Tues 8.00pm
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Alun Lewis reports on new research which suggests that woad, the dye used by ancient Britons, could become a crop plant for the 21st century.
Producer Deborah Cohen. Rptd Tues 8.00pm