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Opportunities and Challenges for Cover Cropping in Sustainable Agriculture Systems in Southern Australia

Author

Listed:
  • Thomas Nordblom

    (Gulbali Institute, Agriculture Water and the Environment, Charles Sturt University, Boorooma Street, Wagga Wagga, NSW 2678, Australia)

  • Saliya Gurusinghe

    (Gulbali Institute, Agriculture Water and the Environment, Charles Sturt University, Boorooma Street, Wagga Wagga, NSW 2678, Australia)

  • Andrew Erbacher

    (Queensland Department of Agriculture and Fisheries, 26 Lagoon Street, Goondiwindi, QLD 4390, Australia)

  • Leslie A. Weston

    (Gulbali Institute, Agriculture Water and the Environment, Charles Sturt University, Boorooma Street, Wagga Wagga, NSW 2678, Australia)

Abstract

Southern Australian farming systems operate predominantly under Mediterranean climatic conditions, which limit the choice of cover crops suitable for enhancement of ground cover and soil moisture retention, erosion control, atmospheric soil nitrogen (N) fixation, and weed suppression between cash crop rotations. Given that the successful establishment of cover crops is climate-driven and also influenced by edaphic factors such as soil pH and salinity, there has been increased interest by southern Australian producers in identifying potential cover crop species well adapted to specific Australian farming systems, which provide vital ecosystem services and sustainable economic benefits through the improvement of soil properties. This review summarises recent findings on cover crop inclusion in diverse farming systems in southern Australia, including continuous and mixed broadacre cropping as well as viticulture and horticulture systems, to identify opportunities and limitations related to their use. Cover crop inclusion in viticulture and pasture systems with lower moisture stress was observed to benefit the subsequent cash crop through enhanced production potential. Long-term, multi-site field experimentation incorporating summer cover crops in winter crop rotations showed that cover crops enhanced ground cover and soil water infiltration in some locations across southern Australia while sometimes increasing winter crop yield, suggesting that soil type and regional climatic conditions greatly influenced the delivery of multiple cover crop benefits. Collectively, these studies have suggested a need for longer-term field evaluations using multiple cover crop species and investigations of termination options under varying environmental and soil conditions to better quantify the legacy effects of cover crops.

Suggested Citation

  • Thomas Nordblom & Saliya Gurusinghe & Andrew Erbacher & Leslie A. Weston, 2023. "Opportunities and Challenges for Cover Cropping in Sustainable Agriculture Systems in Southern Australia," Agriculture, MDPI, vol. 13(3), pages 1-17, March.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:3:p:688-:d:1098463
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    References listed on IDEAS

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    5. Ram N. Acharya & Rajan Ghimire & Apar GC & Don Blayney, 2019. "Effect of Cover Crop on Farm Profitability and Risk in the Southern High Plains," Sustainability, MDPI, vol. 11(24), pages 1-13, December.
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