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soil carbon level

Catalogue: Nuffield Scholar Reports
The global recession has reduced northern hemisphere emissions to a greater level than what is legally required so there has been very little need for trades to occur... In the near future we may have a fish industry based in rural Australia operating in a similar way to the poultry industry, based on the premise that algae has unlocked the method of using cereal grains as a feedstock... A farmer may have 20 years of increase in soil carbon followed by 20 years of gradual decline despite using accepted best practises to retain soil carbon...
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Catalogue: GRDC Final Reports
A pasture phase with legumes was found to be suitable to increase soil carbon... Stubble removal for bioenergy has manageable impacts, and is feasible in most areas provided 1-1.5 t/ha of stubble is retained for soil protection... There is notable interest in the use of multiple sources of biomass in a region for energy production...
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Catalogue: GRDC Updates
The BettaCrop database currently has information for over 10,000 paddocks and includes over 120 current growers across northern, central and southern areas of NSW. Analysis of the database is conducted each year and is able to provide comparisons of various agronomic and management factors that contribute to achieving high water use efficiency (WUE)... The project commenced in July 2008, and will examine the effects of management practices on WUE. Soil water characteristics will be determined and WUE will be calculated and modelled for the growing season... Passioura & Angus also state that tactical management has the potential to increase yields in favourable seasons with little effect on yields in poor seasons...
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Catalogue: GRDC Media
Know your nematodes and set up a crop defence system in 2014.. WA growers are encouraged to find out what species and levels of root lesion nematodes (RLN) are present in their soils during the growing season... DAFWA research has indicated crops that are resistant to P. penetrans are often highly susceptible to P. neglectus or P. teres, highlighting the importance of knowing which species of RLN is present - as management of one RLN species may be causing an increase in another...
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Catalogue: GRDC Media
Know your nematodes and set up a crop defence system in 2014.. WA growers are encouraged to find out what species and levels of root lesion nematodes (RLN) are present in their soils during the growing season... DAFWA research has indicated crops that are resistant to P. penetrans are often highly susceptible to P. neglectus or P. teres, highlighting the importance of knowing which species of RLN is present - as management of one RLN species may be causing an increase in another...
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Catalogue: GRDC Research Summaries
An improvement in the efficiency of soil nitrogen cycling is expected to reduce nitrous oxide emissions... Existing farmer networks (Southern Farming Systems - Hamilton Branch, Horsham East Top Crop Group and the Birchip Cropping Group) will be used to help develop the key messages, so that they clearly demonstrate their relevance and importance to commercial cropping farms... Key extension messages at field days and fact sheets will focus on efficient nitrogen use by utilising existing tools (ie Yield Prophet, deep soil testing) for more informed nitrogen fertiliser decision making...
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Catalogue: GRDC Final Reports
The past two years has been an extraordinary time to address climate change and the adaptation/mitigation strategies for mixed farming systems in the northern region with ongoing political debate and policy changes on carbon pricing, extreme rainfall and big floods... Evaluations show that helping growers understand the processes of atmospheric warming, acknowledging the good and the bad of climate change and analysing future scenarios 'struck a chord' with them... Ten basic strategies were used, with many growers employing more than one strategy (totals >100%): 1) Ignore climate change .....
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Catalogue: GRDC Updates (West)
Sustainable management of soil, in particular soil carbon, is essential for the continued viability of Australian agriculture... Given the longer survival and increased biomass of kikuyu during summer months (compared to annual pastures of rye grass and clover) there is significant interest in the carbon storage capability of this grass species... Model predicts an increase in soil carbon under perennial pasture of 15 t C/ha over 40 years...
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Catalogue: Ground Cover
Automated gas chambers measuring nitrous oxide emissions from canola planted on soils with high and low carbon content at the Liebe Group's soil biology trial site in 2012... Researchers are now interested in learning whether increased soil carbon levels alter nitrogen fertiliser requirements for crops, and if the risk of higher nitrous oxide emissions from crop production increases... "In the first instance, we want to assess whether increasing soil carbon will make a difference to the amount of nitrogen required to produce a barley crop," Dr Barton says...
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Catalogue: Ground Cover
Recent research suggests that nitrogen tie-up may improve the ability of soils to hold nitrogen in the root zone where it is most needed By Bernie Reppel.. CSIRO Land and Water scientist Jeff Baldock says the tie-up process can also be a positive in a wellfunctioning farming system if it improves the soil"s ability to hold nitrogen in the root zone, preventing it from leaching too far down for crop roots to reach... "Work by my fellow soil scientists Dr David Roget and Dr Gupta Vadakattu suggests that soils with good levels of biological activity can hold up to 40 kilograms of nitrogen per hectare in the root zone for subsequent release and use by plants," Dr Baldock says...
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