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Phosphorus budgeting for grain production systems and improving phosphorus acquisition using different phosphorus sources: GRDC – QLD (Webpage)

This Grains Research and Development Corporation (GRDC) webpage summarises research on phosphorus (P) use in grain systems in Goondiwindi (Qld) and Nyngan (NSW). It shows that wheat removes about 8-10 kg P/ha/year and highlights the importance of considering the soil’s phosphorus buffering index (PBI) when planning fertiliser use. Soils with high PBI need more phosphorus input. In low PBI soils, incorporating phosphorus into the soil provides yield and phosphorus uptake advantages over banding and vice versa in high PBI soils. It also looks at fertiliser placement methods and stresses maintaining adequate Colwell P levels to support yields. While this study was located in Qld and NSW, the findings would be of interest for other Australian cropping regions. For more information about PBI, watch the Soil Network of Knowledge webinar, Explaining phosphorus buffering index (PBI) [1:15:25]. #

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  • Audience: RSP, tertiary students, landholders, SFSG, consultants
  • State: ACT, NSW, NT, QLD, SA, TAS, VIC, WA
  • Author/Editor: M Barati, J Laycock, T McLaren, M Knowling
  • Publisher: GRDC
  • Resource Type: Webpage
  • Copyright Year: 2025
  • Not Provided
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Resource Last Updated: August 18, 2025

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