FERTILISER GUIDELINES FOR THE WINE INDUSTRY

in Suid-Afrika . LNR-Infruitec-Nietvoorbij, Private Bag X5026, Stellenbosch 7599, South Africa. SAWYER, J.E., undated. Differentiating and understanding the Mehlich 3, Bray, and Olsen soil phosphorus tests. Iowa State University. SMUTS, M.N., 2001 . Determination of the lime requirement of sandy, organic rich, and structured, high Mg:Ca ratio soils by the Eksteen method. Thesis. Stellenbosch University, Private Bag Xl, Matieland 7602 (Stellenbosch), South Africa. VAN SCHOOR, L.H., CONRADIE, W.J. & RAATH, P.J., 2000 . Guidelines for the interpretation of soil analysis reports for vineyards. WineLand , November, pp. 96-99. VAN SCHOOR, L.H., 2001 . Geology, particle size distribution and clay fraction mineralogy of selected vineyard soils in South Africa and the possible relationship with grapevine performance. M.Sc. Thesis. Stellenbosch University, Private Bag XI, 7602 Matieland (Stellenbosch), South Africa. WHITE, R.E., 2015 . Understanding Vineyard Soils. 2nd Edition. Oxford: Oxford University Press. WOOLDRIDGE, J., 1988. The potassium supplying power of certain virgin upland soils of the Western Cape. M.Sc. Thesis. Stellenbosch University, Private Bag XI, 7602 Matieland (Stellenbosch), South Africa. WOOLDRIDGE, J., 1990. Effect of liming and parent material on the potassium quan tity/intensity relationships of some upland soils of the Western Cape. South African Journal of Plant and Soil 7, 62-67. WOOLDRIDGE, J., 2012 . Effect of soil mineralogy and potassium buffer capacity on wine quality. www.sawislibrary.co.za/ dbtextimages/Wooldridge.pdf

content and pH of juice and wine of Vitis vinifera L. CVS. Cabernet Sauvignon and Cabernet Franc (in Afrikaans). M.Sc. Thesis. Stellenbosch University, Private Bag XI, 7602 Matieland (Stellenbosch), South Africa. JORDAAN, J., 2002 . Improvement of the nitrogen content of grape must with ferti l ization. M.Sc. Thesis. Free State University, Bloemfontein, South Africa. KOPITTKE, P.M. & MENZIES, N.W., 2007 . A review of the use of the basic cation ratio and the “ideal” soil. Soil Science Society of America Journal 71, 259-265. MATULA, J., 2009. A relationship between multi-nutrient soil tests (Mehlich 3, ammo nium acetate, and water extraction) and bioavailability of nutrients from soils for barley. Plant Soil Environ . 55, 173-180. MENGEL, K. & KIRKBY, E.A., 1987a . The Soil as a Plant Nutrient Medium. In: Principles of Plant Nutrition , 4th edition. International Potash Institute, Bern. MENGEL, K. & KIRKBY, E.A., 1987b. Nu trient Uptake and Assimilation. In: Principles of Plant Nutrition , 4th edition. International Potash Institute, Bern. NATHAN, M., SCHARF, P., SUN, Y. & DUNN, D., 2005. Evaluating Mehlich III extractant for extracting available nutrients for Missouri soils using inductively coupled plasma spectrometry. Research Report, Division of Plant Sciences, University of Missouri. ROBINSON, J., 2005 . Critical plant tissue values and application of nutritional stan dards for practical use in vineyards” In: Proceedings of the Soi l Environment and Vine Mineral Nutrition Symposium . P. Christensen and D.R. Smart (Eds.), pp. 61-68. American Society of Enology and Viticulture, Davis, CA. SAAYMAN, D., 1981 . Wingerdvoeding. In: Burger, J. & Deist, J. (eds). Wingerdbou

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PERSONAL COMMUNICATION

BEYERS, C.P. DE L. 2015. Personal interview. 30 September, Stellenbosch. LAMBRECHTS, J.N.N. 2015. Personal interview. 30 September, Stellenbosch.

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