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carbon dioxide

Catalogue: Ground Cover
The scheme is expected to cost some industries and benefit others, with profits possible for those that can trap (sequester) carbon or substantially reduce current carbon emission levels... Each company in the scheme will have an emissions target set for them, which can be met by reducing emissions or buying carbon credits... Experts predict that because of this, agriculture will be managed upstream and downstream: products will be assessed under the scheme at a point in the sale chain (for example, at the abattoirs for stock) and inputs will be assessed prior to use (for example, diesel and agri-chemicals)...
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Catalogue: GRDC Final Reports
" Measurement of paddock-based greenhouse gas emissions from wheat production to improve life cycle assessment of wheat-products DAW00103 Start Date: 31/12/2003.. 2) The emission factor (EF) for nitrous oxide could be reduced from the Department of Climate Change (DCC) standard of 0.3% to a lower figure measured in these experiments eg. 0.06%... As part of the project, greenhouse gas emissions were measured for a rain-fed wheat crop and for lupin and canola crops for comparison...
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Catalogue: Nuffield Scholar Reports
The benefits offered to agriculture with the renewable energy in Australia... The unit is estimated to produce around 210,000 KWh of electricity per year and with no anticipated environmental effects as this type of generator is claimed to be "fish friendly" allowing for migration of fish both up and down the Archimedes screw action... " The easiest way to show this is by the following simple graph that demonstrates that this increase in wind speed creates an exponential increase in energy...
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Catalogue: Nuffield Scholar Reports
I firmly believe that farmers are in the business of producing multiple commodities not just wool or wheat but are custodians of the environment not just for themselves but for society as a whole... As my knowledge expanded and my business increased I began to pass on that knowledge to farmers in an effort to encourage them to plant natives on farms... In the past we have focused as farmers on production and maximising yields...
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Catalogue: GRDC Final Reports
The review demonstrated the safety and natural occurrence of ethyl formate in the diet... In bin fumigant monitoring: In each trial, ethyl formate and CO 2 levels were measured in five critical places in the silos except Trial 6 in which measurements were taken from one position only... Monitoring systems: The Miran SapphIRe (Thermo Environmental Instruments) programmable infra-red gas analyser was used to measure ethyl formate without interference by CO 2 at occupational exposure levels (100 ppm) and below...
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Catalogue: Nuffield Scholar Reports
Products may be identified by proprietary or trade names to help readers identify particular types of products but this is not, and is not intended to be, an endorsement or recommendation of any product or manufacturer referred to... The plant responses are dominated by the result of the greenhouse environment and a link will be made as relative humidity and control is discussed... The saving in energy of a thermal screen is estimated at 5-10%...
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Catalogue: Ground Cover
By Rebecca Thyer The latest speculation on just how much global warming will hit world agriculture has predicted that Australian agriculture faces potential productivity losses of up to 27 per cent within the next 75 years... In a new book, Global Warming and Agriculture: Impact Estimates by Country written by economist William Cline, a senior fellow at the Washington-based Center for Global Development and the Peterson Institute for International Economics, rural Western Australia and Queensland are singled out as becoming Australia's most affected farming areas... If carbon fertilisation is factored in, Australia's possible productivity losses would be limited to about 16 per cent by 2080...
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Catalogue: Ground Cover
Andrew Todd concentrates on a range of water conservation measures to help overcome the decline in rainfall on his family's 4000-hectare property at Dowerin, WA... Dr Blair Trewin from the Bureau of Meteorology's National Climate Centre says for the period 2001-12 rainfall in coastal south-west WA was 15 per cent or more below the 1961-90 period, while wheatbelt rainfall has fallen 10 to 15 per cent over the same period... This has led to a change in global atmospheric circulation, including a lessening of the subtropical jetstream and a decline in winter storm tracks over the south-west of WA (broadly, the region from Northampton north of Perth to east of Esperance)...
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Catalogue: GRDC Publications
Soil organic matter contributes to a range of biological, chemical and physical properties of soil and is essential for soil health... Soils rarely reach their theoretical potential for organic matter storage (see Figure 1.7)... In soils with low clay content the amount of humus and resistant soil organic matter is increasingly important to nutrient exchange because its large surface area gathers (adsorbs) cations from the soil solution, holding nutrients that would otherwise leach...
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Catalogue: GRDC Publications
Soil organic carbon makes up about 58 per cent of the mass of organic matter and is usually reported in a soil analysis report as the concentration (i.e. per cent) of organic carbon in soil (see Chapter 1 for more detail)... If a soil has a significant amount of gravel or stone material, this fraction is removed before analysis with the final soil carbon or nutrient assessment being only representative of the mineral component of the remaining soil... Understanding how organic matter cycles through the soil and what drives its accumulation and loss is critical to maintaining it at optimal levels within agricultural systems...
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