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Fertiliser guides planned for ameliorated soils
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-12-07T00:00:00+11:00As mechanical amelioration of constrained soils delivers improved growth potential new fertiliser guidelines are being devised for WA cropping systems to optimise plant performance.
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Intensive testing key to fertiliser profitability
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-12-05T00:00:00+11:00Paddock variability can have a substantial impact on soil nutrient status and yield potential. More intensive soil testing from each production zone in the paddock can help growers identify areas where modified rates of fertiliser may translate into higher profits.
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Biofertiliser potential in native fungus
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-12-02T00:00:00+11:00Close investigation of the interactions between a fungus native to Jarrah forests of Western Australia and jarrah plants has discovered a novel symbiotic fungus. Further research revealed the native fungus can increase growth and yield of grain crops and offers potential as a biofertiliser.
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Time for fertiliser calculation reboot
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-11-30T00:00:00+11:00A switch to no-till farming means relatively immobile nutrients such as phosphorus and potassium are often restricted to the top few centimetres. Existing soil testing guidelines may not be adequate to reflect the limited ability of roots to access these nutrients under dry conditions.
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Declining phosphorus and potassium reserves provide top-up alert
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-11-29T00:00:00+11:00Reserves and availability of phosphorus and potassium vary widely in soils of the northern grains region. This is not easily predicted based on the soil type, landscape position or cropping history, yet these reserves can be an important early warning system to guide decisions.
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Overcoming constraints on highly calcareous soils
Supplement: Nutrient management for enduring profitability, January-February 2021 - 2020-11-28T00:00:00+11:00Highly calcareous soils are difficult to farm and the keys to improving their productivity are far from clear. New research is targeting issues ranging from low phosphorus status and water-holding capacity, to fertiliser toxicity, Rhizoctonia and subsoil constraints.