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fertilisers

Catalogue: GRDC Research Summaries
" Assessing management options for enhanced soil phosphorus availability using rotations.. The proposed work aims to identify if there are rotation options that can provide an agronomic management solution for the release of fixed P in a range of soils across the grain growing regions of Australia... If the outcomes of this proposed project demonstrate the potential for growers to unlock 1% of the P bank annually by rotation management this would be equivalent to release of $50-100 million worth of fertiliser P (about 10% of the current annual investment of $1.4 billion in P application to grains in Australia)...
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Catalogue: GRDC Research Summaries
Nitrogen (N) and phosphorus (P) fertilisers together constitute one of the largest variable input costs for grain production... Excessive amounts of fertiliser application will not only directly increase input costs but can also lead to yield penalties as well as negative environmental impacts such as greenhouse gas emissions... Current decision support systems, especially those based on soil testing, often underestimate the contribution of all potential soil nutrient pools...
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Catalogue: GRDC Media
WA growers can save by cutting phosphorus rates.. Western Australian grain growers can make significant cost savings by reducing phosphorus application to 'maintenance rates', and using soil test results to fine-tune them... "Researchers need to determine the 'maintenance rates' required for different soils and regions of WA so reliable maintenance recommendations can be made for growers," Dr Wong said...
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Catalogue: GRDC Media
"It is important that we take what we now know out to the farming community so growers can gain a better understanding of how soils respond to management practices.".. The GRDC has established the Soil Biology Initiative to explore what is seen as the "last frontier" for the grains industry, "The arrival and rapid development of new technologies now means we are finally in a position to delve deep into the soil biological communities and see not only who is there but what they are doing, not only as individual species but as highly interactive communities," Assoc Prof Mele said... Knowledge and understanding generated through the Soil Biology Initiative's extensive suite of research projects is expected to lead to recommendations on how growers can best manage soils to maximise nutrient capture and defend against disease, resulting in less reliance on chemical controls and reduced inputs...
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Catalogue: GRDC Media
DAFWA researcher Derk Bakker after digging in a ‘flume’ to measure water run-off and making channels across the trial plot to trap the water... "Non-wetting soils - caused by the presence of waxy surfaces on the sand particles - can be a major impediment to crop germination and productivity in many WA soils, including forest gravels," Dr Bakker said... "While the plough did not greatly improve the wettability of the soil, the cultivation facilitated root growth and improved water penetration, which would have enhanced the accessibility of phosphorus to crops," Dr Bakker said...
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Catalogue: GRDC Media
Central Queensland grain growers are targeting more precise management of soil nutrition to bolster farm productivity, following workshops in Capella and Biloela last week... The producers in attendance are participants in the Grains Best Management Practices (BMP) program, an initiative of the Queensland Department of Agriculture Fisheries and Forestry (DAFF), the Fitzroy Basin Association and AgForce Qld, which help producers identify pathways to improving on-farm practices to meet industry standards and improve profitability... The workshops were delivered by Chris Dowling from Back Paddock Company as part of the northern region, Nutrition - Training and Extension project, for the More Profit from Crop Nutrition II (MPCN II) Initiative, supported by the Grains Research and Development Corporation (GRDC) and DAFF...
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Catalogue: GRDC Media
" Date: 13.12.2013 'Lime bank' deposits a good investment.. The Department of Agriculture and Food (DAFWA) now estimates that soil acidity costs up to $500 million annually in lost production across WA's grainbelt... Researchers including DAFWA's Chris Gazey estimate that 2.5 million tonnes per year of lime is needed for the next decade to recover soil pH to the targets of 5.5 in the surface and 4.8 in the subsurface layers and address ongoing soil acidification...
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Catalogue: GRDC Media
The workshop, supported by the Grains Research and Development Corporation (GRDC), will enable local grain growers to receive expert commentary on the quality of their soils... To be held on August 28 at the Ramblers Football Club, Cummins, the workshop will introduce growers and consultants to the National Soil Quality Monitoring Program, which is funded by the GRDC through its Soil Biology Initiative II (SBI II)... The SBI II program has been able to link with sites being assessed for soil carbon as part of the Soil Carbon Research Program (SCaRP) which is managed by CSIRO and funded by GRDC and the Department of Agriculture, Fisheries and Forestry (DAFF)...
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Catalogue: GRDC Media
Single tillage events can reduce moisture but may boost yields and profitability in the presence of a high weed burden... Dr Yash Dang, Queensland Department of Science, Information Technology, Innovation and the Arts (DSITIA) senior scientist (soil and nutrient management) says balancing soil moisture and weed control has been a dilemma for growers choosing to use strategic tillage to manage difficult-control-weeds within an established no-till farming system... Dr Dang said grain yields showed little response to tillage and one-time tillage using either chisel or offset disc tended to increase grain yields at all the sites but only significantly at the Condamine site...
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Catalogue: GRDC Research Summaries
Despite the expense, fertiliser decisions made by grain growers do not always rely on soil test knowledge as part of a suite of knowledge sources contributing to a rate recommendation... This reflects a significant level of scepticism among some grain growers and advisors that soil testing does not explain crop response, that the recommendations provided using a soil test are flawed due to biased data, or both... The data were stored in a single central repository for access by approved users through an online query tool, the BFDC Interrogator...
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