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p fertiliser

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Catalogue: GRDC Updates
I do believe that we need to develop farming systems which cycle P more efficiently... Both Zn and Cu will remain available to crops and pastures for long periods (up to 10 years for Zn and up to 40 years for Cu) following a recommended rate of application to soil... Due to the increased complexity of management in our current cropping systems and increased costs of fertilisers, there is a greater need for crop monitoring to help make informed nutritional decisions...
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Catalogue: GRDC Updates
At current fertiliser prices and by using the products tested in this trial, the application of balanced N, P, Mg, K and Zn would increase wheat gross margins by approximately $77.60 /ha... The chemistry of P placement; banding versus broadcast Primary researchers: Kylie Dodd, Ganga Hettiarachchi and Mike McLaughlin In P responsive soils, fertiliser banding is used to increase efficiency by improving early root contact with the fertiliser... The results suggest that increased granular fertiliser efficiency with banding was primarily due to improvements in early root contact with fertiliser P rather than its effect on P fixation...
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Catalogue: GRDC Publications
Identify where the benefits of fluid fertilisers are likely to be significant, in terms of climate, soil type and cropping system... The conclusion is that while there does not appear to be any yield advantage associated with using Flexi-N through the boom, as opposed to urea topdressed prior to sowing, there does appear to be an advantage when it is banded... The freight was approximately $40/tonne, compared to solid fertiliser delivered bulk, which is approximately $20/tonne...
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Catalogue: GRDC Final Reports
The mechanisms responsible for effectiveness of fluid fertilisers in calcareous soils, and the ineffectiveness of granular P, were identified chemically and spectroscopically... Field experiments on calcareous and non-calcareous soils in the Victorian Wimmera and Mallee regions have also shown that fluid fertilisers can improve grain yields on these soil types, although the magnitude of grain responses were usually smaller than on the highly calcareous soils in South Australia... There is a growing demand for information on fluid fertilisers and their use in cropping in Australia, as demonstrated by the increasing hits to the fluid fertiliser website, and the growth in circulation of the Fluid Newsletter, and the popularity of the Fluid Workshop held in 2004...
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Catalogue: GRDC Research Summaries
Soil testing the key to fertiliser strategy.. Northern region grain growers are being urged to test for subsoil phosphorus (P) in order to identify opportunities to bolster long-term yields through deep placement of P fertiliser... Deep soil testing to 40 centimetres or below across Western Australia's agricultural regions has revealed there is more nitrogen in the subsoil that can be accessed by crops than previously realised...
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Catalogue: GRDC Research Summaries
Fertilisers have traditionally represented a significant part of the variable costs of growing crops in Australia... The expected outcome of this project is best nutrient management strategies evaluated in the context of a risk-return framework... Assuming farmers are profit -maximizers and risk-neutral, this analysis shows that they are likely missing out on the better seasons by under-fertilizing in sandy dunes and mid slopes of several sites across the Mallee...
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Catalogue: GRDC Research Summaries
Fertilisers have traditionally represented a significant part of the variable costs of growing crops in Australia... Whether fertiliser input can be sustained is under question because the profitability of fertiliser use by grain growers is undergoing considerable change... Although the cost of fertiliser has receded from peak prices, the recovery of the world economy is expected to place upward pressure on energy prices in the future...
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Catalogue: GRDC Updates (North)
Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... People in some areas have very low levels of awareness that salinity is a problem, and report a low level of salinity... The chemical fertility of soil is only one group of factors that need to be considered when producing a good crop and a good income...
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Catalogue: GRDC Updates (South)
Oil composition can be compromised and lead to a change in fatty acid profiles if the seed is harvested when too moist, the seed has been excessively thrashed, admixture / moisture and disease levels are too high or the temperatures in your silo reach 35 C plus for more than 3 or 4 days in a row... People in some areas have very low levels of awareness that salinity is a problem, and report a low level of salinity... The chemical fertility of soil is only one group of factors that need to be considered when producing a good crop and a good income...
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Catalogue: GRDC Updates (West)
Agriculture is under increasing pressure to develop management practices to minimise P loss... The modelling predicts that depending on location and the benefit from biochar a farmer can spend between $15 and $165 either buying or producing biochar on farm and break-even... In this type of seasons, P fertiliser placed at 14 cm depth remained in moist soil longer than P placed at 4 or 8 cm and was more available for crop uptake later in the season...
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