Château Duc d'Arnauton AOC Red Graves Area: 4 ha. Location: Landiras. Average age of vines: 15 years old. Soil type: Clay limestone, rough sand, gravelly soil. Grape-varieties: 50% Merlot, 50% Cabernet Sauvignon. Density of plantation: 5 500 plants per ha. Vinification: Fermentation in stainless steel vats with thermoregulation; pumping over: twice a day. From 15 to 21 vatting days. 10% bleeding.