Effect of Different Environmental Factors on the Performance of Sauvignon Blanc Grapevines in the Stellenbosch/Durbanville Districts of South Africa
Effect of Different Environmental Factors on the Performance of Sauvignon blanc Grapevines in the Stellenbosch/Durbanville Districts of South Africa. I. Geology, Soil, Climate, Phenology and Grape Composition W.J. Conradie1, V.A. Carey1*, V. Bonnardot2, D. Saayman3 and L. H. van Schoor1 1) ARC Infruitec-Nietvoorbij, Private Bag X5026, 7599 Stellenbosch, South Africa 2) ARC Institute for Soil, Climate and Water, Private Bag X5026, 7599 Stellenbosch, South Africa 3) Distell, Box 184, 7599 Stellenbosch, South Africa Submitted for publication: June 2002 Accepted for publication: August 2002 Key words: Geology, soil, climate, terroir, grapevine, phenology, growth, yield, must analysis A study in five commercial Sauvignon blanc vineyards, grown at different localities in the Western Cape of South Africa, was carried out over a period of seven years. These localities (four within the district of Stellenbosch and one in Durbanville) were within a radius of 15 km and underlain by different geological formations. Two experimental plots, representing different soil forms, were identified at each locality. In some cases soils could be related to the s Grapevine . materials l geologica f o s mixture m fro d develope s soil e th s case r othe n i t bu , materials t paren g underlyin were not irrigated and root distribution was mostly affected by factors such as soil moisture, compacted layers and percentage stone, and not necessarily by geological parent material. Relatively good root distribution was obtained for at least one soil from each parent material (granite, hornfels, shale). Management practices, such as liming and fertilisation, changed the chemical properties of the soil.
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