Increasing profit from N, P, and K fertiliser inputs
This project is delivering knowledge that will enable grain producers to maximise the profit they achieve from the application of nitrogen (N), phosphorus (P), and potassium (K) fertilisers to crops.
Building new knowledge for a changing cropping landscape
Empowering growers with greater confidence for nutrient management in grain production
Latest project news and knowledge
NPK project research highlighted at upcoming grower forums
Upcoming grower forums held across the grainbelt by GRDC will
Under the radar: Potassium on loamy soil
Negative potassium balances are starting to catch up with growers
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The current evidence used to support N, P, and K decisions is inadequate and has led to a lack of confidence that needs to be better supported with updated knowledge.
The evolving cropping sequences in the Western Region require specific advice that improves precision in nitrogen (N), phosphorus (P) and potassium (K) fertiliser decisions.
Decision gaps exist in N, P and K fertilizer management because of climate and systems changes since most crop nutrition knowledge was obtained. Annual winter rainfall has declined and the number and size of rainfall events in autumn has decreased (Hope et al., 2006; IOCI, 2002).
Soil P has accumulated across much of the region with a recent survey showing that 70% of soils have soil P levels above the critical concentration for 90% of maximum production (Weaver and Wong, 2011). N and K decisions are problematic and negative balances are common for these nutrients (National Land and Water Resources Audit, 2001).
- Craig Scanlan (DPIRD)
- Daniel Murphy (Murdoch University)
- Zed Rengel (The University of Western Australia)
- Richard Bell (Murdoch University)
- Frances Hoyle (Murdoch University)
- Raj Malik (DPIRD)
- Gustavo Boitt (The University of Western Australia)
- Miao Miao Cheng (Murdoch University)
- Qifu Ma (Murdoch University)
- Wayne Pluske (Equii)
- James Easton (CSBP)
- Andreas Neuhaus (CSBP)
- Mark Gherardi (Summit)
- Louise Barton (The University of Western Australia)
- Liz Petersen (Advanced Choice Economics)
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Contact the project team to learn more about its findings and potential applications to your context.
Project lead: Craig Scanlan, Senior Research Scientist at Department of Primary Industries and Regional Development
This project is supported by a Grains Research and Development Corporation (GRDC) co-investment. Other funding and in-kind support was provided by the Department of Primary Industries and Regional Development (DPIRD), Murdoch University, The University of Western Australia, and industry partners CSBP and Summit Fertilisers.
GRDC Project Code: UMU1801-006RTX