Technical Yearbook 2024

FIGURE 5. Monthly rainfall during the (A) 2017/18, (B) 2018/19, (C) 2019/20 and 2020/21 growing seasons at the experimental plots where grapevines were irrigated via the in-field fractional use (augmentation) of winery wastewater with raw water.

FIGURE 6. Total rainfall in winter, i.e. June to August, for all four growing seasons at the experimental plots where grapevines were irrigated via the in-field fractional use (augmentation) of winery wastewater with raw water.

Conclusion Results of the textural analyses of the selected soils showed that there was a substantial difference in their textural properties. In this regard, it was expected that they would respond differently to the in-field fractional use (augmentation) of winery wastewater with raw water for vineyard irrigation. Furthermore, the winter rainfall varied considerably in the production regions and it was expected that the grapevines growing in the Lower Olifants River region would require more irrigation during the growing season than the other two regions. 

References https://www.wineland.co.za/in-field-fractional-use-of-winery-wastewater-with-raw-water-part-1/

For more information contact Carolyn Howell at howellc@arc.agric.za.

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TECHNICAL YEARBOOK 2024