Five-year-old vines were grown on south-facing slopes and terraces of the Mecsek Hills (latitude: 46◦07 N, longitude: 18◦17 E, 200m elevation) in non-irrigated field conditions. The soil was a Ramann-type brown forest soil mixed with clay, formed on Pannonian red sandstone. Vines were trained to an umbrella system with 2.0m×1.0m row by vine spacing. Row direction was North–South on steep slopes and East–West on micro terraces. Steep slopes are typically characterized as severely eroded sites with shallow soil layer. Representative leaf samples for measurements originated from homogeneous plantings with 100 vines of each cultivar. The site is situated within the Praeillyricum
(plant geographical district), which on average receives 782mm of precipitation per year, 2021 h of sunshine annually and with an annual mean temperature of 11.6 ◦C. However, the mesoclimatic characteristics of the site show significant extremes in
precipitation events (344–1140 mm), in amount of sunshine hours (1986–2548 h) and in annual mean temperature (9.3–14.0 ◦C)according to data collected between 1950 and 2005 (IVO, 2010)..