Ungrafted Vines in Po Delta Park, Emilia Romagna Region, Italy, described by Mirco Mariotti. This ancient practice consists to repleace a vine with its own roots without grafting. At the beginning of 20th century all european vineyard were distroyed by philloxera, a little afide lives under the soil. In a soil with at least the 90% of sand this afide cannot live so it’s possible to make again the ungrafted plantation, very useful to preserve the genitic profile of grapes varities.
