Marriage is not always easy.  Yet, Azienda Vinicola Rivera handles it with ease, as demonstrated in their production of Nero di Troia. I had the pleasure of visiting their winery and learning about their flagship grape when I was invited to serve as a judge for the 17th annual southern Italian wine competition, Radici del Sud, in Puglia. Radici del Sud underscores the food, wine and viticulture in southern Italy visible. Since 2005, Radici has given prominence to the indigenous wines and olive oils from Puglia, Basilicata, Campania, Calabria, Sicily, Molise, Sardinia and Abruzzo. Azienda Vinicola Rivera Azienda Vinicola Rivera S.p.A is located in the city and commune of Andria,…