After an apprenticeship as a gardener in Karlsruhe, the German viticultural expert Johann Christian Metzger (1789-1852) was head assistant in the palace garden of Schwetzingen and head gardener for Margrave Ludwig in Karlsruhe, and then held the position of plantation inspector for the Enz, Kinzig, Murg and Pfinz districts, based in Rastatt. In 1812, as university gardener, Metzger was appointed gardener in charge of Heidelberg Castle and in 1843 was appointed garden director. In addition to other functions, he was a member of the Baden Parliament, a member of the Heidelberg University and president of the fruit-growing section for the assemblies of German wine and fruit-growing producers.
For me, Lexicon from wein.plus is the most comprehensive and best source of information about wine currently available.Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)