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Economic and environmental comparison of conventional and conservation agriculture in South African wheat production

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  • Willy Mulimbi
  • Lawton Lanier Nalley
  • Johann Strauss
  • Kristiina Ala-Kokko

Abstract

Global wheat yields must increase to meet current and rising global demand despite the increasing threats to production resulting from climate change. One climate change adaptation strategy in wheat production in the Western Cape of South Africa is conservation agriculture (CA). Using a data set of 1,043 plot-level wheat observations collected at Langgewens and Tygerhoek research farms from 2002 to 2020, this study conducts a stepwise Life Cycle Assessment (LCA) to estimate the environmental and economic impacts of switching from conventional wheat production to CA’s zero tillage (zero-till) and no-tillage (no-till) systems. The results indicate that CA is more profitable and has a higher environmental efficiency, than conventional tillage wheat production. In Langgewens, zero-till and no-till are respectively 113% and 55% more efficient than conventional tillage when comparing the environmental impact of producing one kg of wheat. Findings also suggest that, compared to 100% conventional tillage wheat production, the adoption of CA systems has led to reductions in environmental damage valued between R269.2 and R402.5 million in the Western Cape.

Suggested Citation

  • Willy Mulimbi & Lawton Lanier Nalley & Johann Strauss & Kristiina Ala-Kokko, 2023. "Economic and environmental comparison of conventional and conservation agriculture in South African wheat production," Agrekon, Taylor & Francis Journals, vol. 62(2), pages 133-151, April.
    • Handle: RePEc:taf:ragrxx:v:62:y:2023:i:2:p:133-151
    DOI: 10.1080/03031853.2023.2169481
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    References listed on IDEAS

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    1. Aaron M. Shew & Jesse B. Tack & Lawton L. Nalley & Petronella Chaminuka, 2020. "Yield reduction under climate warming varies among wheat cultivars in South Africa," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    2. Weidema, Bo Pedersen, 2009. "Using the budget constraint to monetarise impact assessment results," Ecological Economics, Elsevier, vol. 68(6), pages 1591-1598, April.
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    1. Kamran Kheiralipour & Miguel Brandão & Malgorzata Holka & Adam Choryński, 2024. "A Review of Environmental Impacts of Wheat Production in Different Agrotechnical Systems," Resources, MDPI, vol. 13(7), pages 1-14, July.

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