"Warington, Katherine"@en . "1993-07-03Z"^^ . "1993Z"^^ . . "1897-09-05Z"^^ . "Katherine Warington (5 September 1897 \u2013 3 July 1993) was a botanist and the first person to show that boron, as boric acid, was essential for the healthy growth of plants."@en . "1897Z"^^ . "British botanist" .