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n fixation

Catalogue: GRDC Media
The conference will bring together Australian and international delegates with an interest in biological nitrogen (N) fixation... Co-hosted by the Australian Society for Nitrogen Fixation, the University of Adelaide and the SA Research and Development Institute and sponsored by the Grains Research and Development Corporation (GRDC), the AW Howard Memorial Trust, the SA Grain Industry Trust, BASF Agricultural Specialties and Novozymes Biologicals Australia, the conference will be based at the Plant Research Centre at the Waite Precinct, Urrbrae, and will include a field tour to the Mid North of SA... The theme of the event is "N 2 fixation: reaping the benefits of basic and applied research", and the topics of targeted sessions will include the diversity and ecology of N-fixing organisms; molecular genetics and mechanisms of N fixation; N-fixing symbioses; N fixation in terrestrial systems; and increasing fixed N in farming systems...
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Catalogue: GRDC Media
For grain growers who thought they were already shovelling out the nitrogen every year, 's a sobering thought... Dr Angus says the rate of decrease appears to be linear over 10 to 30 years but after about 50 years, turns out to be curved and soil N eventually flat-lines... Dr Angus says it is likely that gross margins underestimate the profitability of the mixed pasture-crop system by not accounting for other synergies between pastures and crops...
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Catalogue: GRDC Media
Studies have revealed that growing crop legumes in rotation with cereals can often reduce the need for nitrogen fertiliser inputs by 40 to 80 kilograms per hectare, and improve crop productivity... Basic principles and practical management information relating to nitrogen fixation by crop legumes is contained in a new fact sheet released by the Grains Research and Development Corporation (GRDC)... The ability of legumes to form a mutually beneficial association with rhizobia and fix atmospheric nitrogen gas enables them to grow in almost any soil without nitrogen fertiliser...
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Catalogue: GRDC Factsheets
Nitrogen fixation by crop legumes reduces the need for fertiliser nitrogen (N) and emissions of nitrous oxide... Benefits from legumes can be maximised by using high-yielding legume varieties that are not constrained by poor management, insects, disease, weeds or nutrient deficiencies... amounts of n Nitrogen fixation by crop legumes has now been estimated in many studies...
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Catalogue: GRDC Factsheets
Nitrogen fixation by crop legumes reduces the need for fertiliser nitrogen (N) and emissions of nitrous oxide... Benefits from legumes can be maximised by using high-yielding legume varieties that are not constrained by poor management, insects, disease, weeds or nutrient deficiencies... amounts of n Nitrogen fixation by crop legumes has now been estimated in many studies...
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Catalogue: GRDC Factsheets
Northern grain growers sowed about 450,000 hectares of chickpeas and 30,000 hectares of faba beans in 2012, resulting in the fixation of about 35,000 tonnes of nitrogen (N) worth $55 million in fertiliser N equivalence... data from NSW department of Primary industries long-term rotation experiments in northern NSW show no-till methods improve the productivity and N 2 fixation of chickpeas and faba beans... Similar results were achieved in trials with faba beans (see Table 3)...
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Catalogue: GRDC Factsheets
Northern grain growers sowed about 450,000 hectares of chickpeas and 30,000 hectares of faba beans in 2012, resulting in the fixation of about 35,000 tonnes of nitrogen (N) worth $55 million in fertiliser N equivalence... data from NSW department of Primary industries long-term rotation experiments in northern NSW show no-till methods improve the productivity and N 2 fixation of chickpeas and faba beans... Similar results were achieved in trials with faba beans (see Table 3)...
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Catalogue: GRDC Media
Australian and international experts with an interest in biological nitrogen (N) fixation will soon converge on Adelaide (South Australia)... The 17th Australian Nitrogen Fixation Conference, from September 28 to October 2, will be based at the Plant Research Centre at the Waite Precinct, Urrbrae, and will include a field tour to the Mid North of SA... The conference is being co-hosted by the Australian Society for Nitrogen Fixation, the University of Adelaide and the SA Research and Development Institute and sponsored by the Grains Research and Development Corporation (GRDC), the AW Howard Memorial Trust, the SA Grain Industry Trust, BASF Agricultural Specialties and Novozymes Biologicals Australia...
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Catalogue: GRDC Media
Understand the factors that affect mineralisation.. The rate of mineralisation varies with soil temperature, water content and, depending on the soil type, it can vary with the amount of organic matter and residues, and pH - mineralisation is slower in acidic soils... During the growing season, the amount of mineralisation is reasonably predictable and models are available that will estimate mineralisation over time periods ranging from days to years...
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Catalogue: GRDC Research Summaries
Activity 1: Estimation of the actual amount of N fixed: In Australia, most estimates of FL-N fixation were determined using indirect methods, e.g. N balance estimates or nitrogenase activity measurements using acetylene reduction assay... While the estimates provide an indication of N fixation potential, they do not provide direct estimates of N fixed... Estimation of the actual amount of N fixed quantify the amount of N fixed - Acombination of 15N isotope tracer methodology and biochemical methods are being standardized to quanity the amount of 15N fixed using soils from South Australia (Calcorosol, Alfisol, Vertisol) and Western Australia (Sodosol)...
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