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Catalogue: Ground Cover
It is a simple fact that micronutrients (or trace elements) are only needed by crops and pastures in small amounts, but they play a major part in maximising production... Early identification of what is missing in the paddock is a key part of effective farm management, scientist Dr Nigel Wilhelm says... New research into national micronutrient deficiencies, supported by the GRDC and overseen by Dr Wilhelm's team from the South Australian Research and Development Institute (SARDI), has been examining tactics for detecting and managing trace-element deficiencies in crops...
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Catalogue: GRDC Updates (West)
Phosphorus management is characterized by an initial build-up phase that corrects P deficiency followed by a maintenance phase after soils reach the Colwell P values needed for near maximum production (critical values)... For example, if we removed 5 kg P/ha in the form of P contained in grains and we applied 10 kg P/ha as fertiliser, then the P balance efficiency is 5/10x100 = 50 %. P balance efficiency allows us to assess along with soil test P data if we are building-up, maintaining or depleting soil P... We estimate that about 87% of the wheat paddock soil samples examined are no longer P deficient (exceed their critical values)...
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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 Media
Research puts spotlight on micronutrients.. New research aims to deliver clear guidelines to Western Australian grain growers to help them manage micronutrient (trace element) disorders in their crops, particularly wheat... Murdoch University's Richard Bell, who is one of the researchers involved in the project, said that despite crop plants requiring only small quantities of micronutrients, inadequate supplies could reduce growth and crop yields and lead to nitrogen and water being wasted...
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Catalogue: Ground Cover
During spring 2014, a range of MPCN research projects were showcased at field days across Western Australia by collaborators from the Department of Agriculture and Food, WA (DAFWA), CSIRO, the University of Western Australia (UWA) and Murdoch University... Dr Craig Scanlan from DAFWA discusses the interaction between lime and soil nutrients at the Liebe Group Spring Field Day in September 2014... Dr Ross Brennan, from DAFWA, and ConsultAg agronomist Garren Knell joined forces at a CSBP trial site in York and a GRDC national frost project trial site in Wickepin to produce a short video addressing the conjecture regarding a link between copper deficiency and frost damage...
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Catalogue: Ground Cover
During spring 2014, a range of MPCN research projects were showcased at field days across Western Australia by collaborators from the Department of Agriculture and Food, WA (DAFWA), CSIRO, the University of Western Australia (UWA) and Murdoch University... Dr Craig Scanlan from DAFWA discusses the interaction between lime and soil nutrients at the Liebe Group Spring Field Day in September 2014... Dr Ross Brennan, from DAFWA, and ConsultAg agronomist Garren Knell joined forces at a CSBP trial site in York and a GRDC national frost project trial site in Wickepin to produce a short video addressing the conjecture regarding a link between copper deficiency and frost damage...
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Catalogue: GRDC Media
Research is showing that increased lime use across WA is affecting micronutrient concentrations in crop plants and changing the residual value of these nutrients on acid soils... To assess the micronutrient status of cereal crops, samples of flag leaves are the best bet for tissue testing analysis... Dr Brennan, of the Department of Agriculture and Food WA (DAFWA), says the MPCN team is also finding that liming on acid soils reduces Cu, Zn and Mn concentrations but increases Mo in crop plants and can change the residual value of micronutrients...
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Catalogue: GRDC Media
Research is showing that increased lime use across WA is affecting micronutrient concentrations in crop plants and changing the residual value of these nutrients on acid soils... To assess the micronutrient status of cereal crops, samples of flag leaves are the best bet for tissue testing analysis... Dr Brennan, of the Department of Agriculture and Food WA (DAFWA), says the MPCN team is also finding that liming on acid soils reduces Cu, Zn and Mn concentrations but increases Mo in crop plants and can change the residual value of micronutrients...
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Catalogue: Ground Cover
Image of Nigel Wilhelm inspecting a young oat plant.. Growers should not rely on visible signs of micronutrient deficiencies in crops as symptoms of the most common micronutrient issues are vague and inconsistent... Zinc seed dressings are effective and will supply zinc to the young crop but cannot completely overcome a severe deficiency, nor will they provide benefit in subsequent years...
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Catalogue: GRDC Media
Tissue testing a health check-up for micronutrients.. Charlie Walker, member of the GRDC trace elements project advisory committee, says growers should consider tissue testing like a blood test for crops... Incitec Pivot technical and development manager Charlie Walker, who is a member of the GRDC trace elements project advisory committee, says tissue testing can be compared to blood testing in humans...
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