Porphyry is a soil type described by Tom Stevenson (2011) as ‘a coloured igneous rock with high pH.’
Bibliography
Tom Stevenson (2011) The Sotheby’s Wine Encyclopedia 5th Edition by Tom Stevenson (Dorling Kindersley, 2011), p.17-19.
Porphyry is a soil type described by Tom Stevenson (2011) as ‘a coloured igneous rock with high pH.’
Bibliography
Tom Stevenson (2011) The Sotheby’s Wine Encyclopedia 5th Edition by Tom Stevenson (Dorling Kindersley, 2011), p.17-19.