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Registros recuperados: 33
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A farm level assessment of a novel drought tolerant forage:Tedera (Bituminaria bituminosa C.H.Stirt var. albomarginata). AgEcon
Finlayson, John D.; Real, Daniel; Nordblom, Thomas L.; Revell, Clinton; Ewing, Michael A.; Kingwell, Ross S..
Tedera (Bituminaria bituminosa C.H.Stirt var. albomarginata) is a drought tolerant perennial legume originating in the Canary Islands. This study evaluates the potential role and value of tedera in dryland mixed crop and sheep production systems in southern Australia. Regional variants of the bio-economic model MIDAS are used to assess tedera in farming systems at two locations. The analysis considers the quantity and quality of feed produced by tedera, the ability of other forages to complement or substitute for tedera and its impact on meat versus wool-producing sheep flocks. The results indicate that tedera offers the potential to increase farm profits by up to 26% and be grown on ~28% of a low rainfall mixed enterprise farm. On a high rainfall mixed...
Tipo: Presentation Palavras-chave: Tedera; Drought tolerant; Forage; Legume; Mediterranean-type climate; Autumn feed gap; Bio-economic modelling; Whole farm modelling; Technology evaluation; MIDAS; Model of dryland agricultural system.; Crop Production/Industries.
Ano: 2012 URL: http://purl.umn.edu/124297
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An analysis of the spatial and temporal patterns of greenhouse gas emissions by agriculture in Western Australia and the opportunities for agroforestry offsets AgEcon
Kingwell, Ross S.; Harris-Adams, Keely.
If agriculture is included in an Australian emissions trading scheme then it may face from 2015 at the earliest, a price for its greenhouse gas emissions; and thereby have incentives to offset and lessen its emissions. Yet because there is currently little understanding of the spatial pattern of emissions in agricultural regions of Australia, the extent of the challenge the sector faces in reducing its emissions is not fully recognised. To improve our understanding, this study uses the National Greenhouse Accounts methodology to estimate the spatial and temporal patterns of agricultural emissions since 1990 in the key agricultural region in Australia’s southwest. This region generates almost 40 percent of the nation’s winter crop production and supports...
Tipo: Conference Paper or Presentation Palavras-chave: Greenhouse gas emissions; Spatial analysis; Agriculture; Offsets; Sequestration.
Ano: 2009 URL: http://purl.umn.edu/48161
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Book reviews AgEcon
Chang, Hui-Shung (Christie); Carrington, Roger; Kingwell, Ross S.; Dumsday, Robert G.; Murray-Prior, Roy B.; Patrick, Ian; Grafton, R. Quentin; Wright, Vic.
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2003 URL: http://purl.umn.edu/118166
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Book reviews AgEcon
McCann, Laura M.J.; Crase, Lin; Wan, Guang Hua; Kingwell, Ross S.; Simmons, Phil; Malcolm, Bill; Satbir, Singh.
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2001 URL: http://purl.umn.edu/117469
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BROADACRE FARM PRODUCTIVITY AND PROFITABILITY IN SOUTH WESTERN AUSTRALIA AgEcon
Islam, Nazrul; Xayavong, Vilaphonh; Kingwell, Ross S..
This paper examines broadacre farm performance in south-western Australia. This region has experienced pronounced climate variability and volatile commodity prices over the last decade or so. Relationships between productivity and profitability are explored using panel data from 50 farms in the study region. The data are analysed using non-parametric methods. Components of farm productivity and profitability are measured over the period 1998 to 2008. Economies of scale and scope are shown often to be positive contributors to productivity and profitability. However, the main finding is that technical change, much more so than technical efficiency, has supplied over 68 percent of the improvement in total factor productivity for farms in the different...
Tipo: Conference Paper or Presentation Palavras-chave: Productivity; Profitability; Technical change; Farm businesses; Farm Management; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011 URL: http://purl.umn.edu/100565
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Changing Farming Systems – Financial Implications for Farming Businesses AgEcon
Bennett, Anne L.; Edward, Alex; Herbert, Allan; Kingwell, Ross S.; Peak, Caroline; Rodgers, David.
Future prosperity of farming businesses depends not only on immediate prospects, but also on the capability to adapt to changing circumstances. In looking to the future, farm managers need to assess where the current farming system is taking them, and whether changing to an alternative farming system might be more profitable. There are various techniques for assessing the profitability of alternative farming systems, but frequently the cost of transition is overlooked. The financial consequences of transition to a new farming system are assessed for two case study farms using a spreadsheet tool (STEP), developed by the authors. The tool assists farm managers in assessing the risk of transition strategies as well as comparing rotations.
Tipo: Conference Paper or Presentation Palavras-chave: Farm Management.
Ano: 2003 URL: http://purl.umn.edu/57834
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Charging for the use of plant varieties AgEcon
Kingwell, Ross S..
Private and many publicly funded plant breeding organisations charge farmers for use of varieties they develop. This article compares four alternative charging mechanisms and outlines responses to these alternatives by farmers and plant breeders. Risk‐averse farmers and breeders are shown to have opposite preferences for charging mechanisms. Results suggest profit‐based or royalties are preferred by farmers whereas breeders prefer area or tonnage‐based royalties. Risk‐sharing arrangements between both parties could lead to an overall preference for profit‐based or royalties. However, this finding is subject to important caveats and practical limitations.
Tipo: Journal Article Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/117468
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Climate Change and the Economics of Farm Management in the Face of Land Degradation: Dryland Salinity in Western Australia AgEcon
John, Michele; Pannell, David J.; Kingwell, Ross S..
Paper removed at request of authors 08/03/07.
Tipo: Conference Paper or Presentation Palavras-chave: Dryland salinity; Climate change; Low rainfall agriculture; Land degradation; Whole farm bioeconomic modelling; Environmental Economics and Policy; Farm Management.
Ano: 2006 URL: http://purl.umn.edu/25800
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Climate Change Impacts on Investment in Crop Sowing Machinery AgEcon
Kingwell, Ross S.; Farre, Imma.
Down-scaled global circulation modelling is combined with wheat growth simulation modelling to generate yield responses to times of sowing under current and projected climatic conditions for several locations in the grainbelt of Western Australia. A model for investment in crop sowing machinery draws on these simulated yield relationships at each location and is used to determine a farmer’s optimal investment in crop sowing work rate capacity under current and projected climate regimes. The key finding is that at most locations the projected change in climate has marked impacts on profit distributions from grain production, yet mostly modest changes in the farmer’s investment in machinery work rate form part of the profit-maximising response to climate...
Tipo: Conference Paper or Presentation Palavras-chave: Climate change; Farm machinery; Farm management; Machinery investment; Environmental Economics and Policy; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/6011
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Comparing the profitability of sheep, beef, dairy and grain farms in southwest Victoria under different rainfall scenarios AgEcon
Browne, Natalie; Kingwell, Ross S.; Behrendt, Ralph; Eckard, Richard.
Dryland farming is commonplace in Australia so the profitability of dryland farms often depends on the amount and timing of rainfall. With drier weather conditions featuring in climate change projections for southern Australia, it is important to understand the relationships between rainfall, commodity prices and farm profitability. Using correlated farm commodity and input prices from the past nine years, farm profitability was calculated for a range of farm types in southwest Victoria under low, average and high rainfall scenarios. Fourteen representative farms were examined that included production of Merino fine wool, prime lamb, beef cattle, milk, wheat and canola. This paper compares and contrasts the spread of profitability of these farms against...
Tipo: Working Paper Palavras-chave: Dryland farming; Farm enterprises; Climate change; Price variability; Crop Production/Industries; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2012 URL: http://purl.umn.edu/124249
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Debugging Mathematical Programming Models: Principles and Practical Strategies AgEcon
Pannell, David J.; Kingwell, Ross S.; Schilizzi, Steven.
Bugs are an unavoidable aspect of mathematical programming (MP) modelling. In this paper we discuss the prevention and diagnosis of bugs in MP models. The topic is rarely addressed in the literature but is crucial to the success of modelling projects, especially for large models. We argue that finding a bug and understanding unexpected results (whether or not due to a bug) are very closely related activities. We identify different types of bugs and suggest practical strategies for dealing with each. Adopting procedures for prevention of bugs is essential, especially for large models. We outline the prevention strategies we have adopted and found successful for the MIDAS and MUDAS models.
Tipo: Journal Article Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1996 URL: http://purl.umn.edu/12306
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Dryland Salinity: Spatial Impacts and Farmers' Options AgEcon
Kingwell, Ross S..
The salinisation of farmland in Australia is a major natural resource management problem. Over the next 20 years a further 1.1 million hectares of broadacre farmland is predicted to become salt-affected. This paper firstly explores the spatial ramifications of the spread of salinity in Australia's agricultural regions. Some of the nation's most profitable grain growing regions will become seriously affected by salinity over the next 20 years. Secondly this paper outlines the nature, uptake and profitability of various salinity management options available to Australian farmers. These options include preventative and containment measures, such as engineering solutions and adoption of deep-rooted perennials, and other options involving adaptation to more...
Tipo: Conference Paper or Presentation Palavras-chave: Farm Management.
Ano: 2003 URL: http://purl.umn.edu/24391
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Dynamic trade-offs in water use between irrigation and reservoir aquaculture in Vietnam AgEcon
Tran, Lap Doc; Schilizzi, Steven; Kingwell, Ross S..
Conflicts of interest between irrigation and aquaculture in water use from reservoirs in Vietnam can be resolved when trade-offs in the economic value of water can be quantified over time. Determining these trade-offs can be used as a benchmark for making decisions about managing reservoirs tending to develop rural areas in Vietnam. To solve this problem, a stochastic dynamic programming model was constructed. This model maximizes the expected net present values generated by both agriculture and aquaculture by finding the optimal release paths throughout a year, under conditions of uncertain rainfall. The model was constructed using two main components. First, a dated water production function is used to evaluate responses of crop yields for different...
Tipo: Conference Paper or Presentation Palavras-chave: Irrigation; Reservoir aquaculture; Stochastic dynamic programming; And dynamic trade-offs; Community/Rural/Urban Development.
Ano: 2010 URL: http://purl.umn.edu/59171
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Economics of grain accumulation for ethanol production: a regional case study AgEcon
Anderton, N.; Kingwell, Ross S..
Ethanol production is increasingly commonplace in many grain producing regions. This paper uses the grain producing region of Western Australia as a case study to illustrate how the location and size of an ethanol plant affects its grain accumulation costs. Specifically, this study examines how price variability of various wheat grades, combined with spatial and temporal variability in production of those grades affects the costs of grain accumulation for ethanol production. These costs are the main component of a plant's operating costs so lessening these costs can offer a comparative advantage for a plant owner. Logistics models' based on mathematical programming were constructed to depict a range of plant sizes and locations for ethanol production. The...
Tipo: Conference Paper or Presentation Palavras-chave: Ethanol; Mathematical programming; Logistics; Wheat; Grain quality; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/10349
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Effects of Tactical Responses and Risk Aversion on Farm Wheat Supply AgEcon
Kingwell, Ross S..
A discrete stochastic programming model of the farming system of the eastern wheatbelt of Western Australia is used to examine the effect of tactical responses and risk aversion on wheat supply. Including within-season tactical changes to wheat areas decreases the own-price elasticity of supply. By contrast, introducing risk aversion has no consistent effect on the own-price elasticity of supply. The implications for supply models are discussed.
Tipo: Journal Article Palavras-chave: Demand and Price Analysis.
Ano: 1995 URL: http://purl.umn.edu/12393
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Impact on Western Australia’s sheep supply chain of the termination of live sheep exports AgEcon
Nath, Tanmoy; Kingwell, Ross S.; Cunningham, Peter; Islam, Nazrul; Xayavong, Vilaphonh; Curtis, Kimbal; Feldman, David; Anderton, Lucy; Mahindua, Truphena.
Western Australia (WA) supplies around three-quarters of Australia’s exports of live sheep. The number of sheep exported live from WA has ranged from 4.5 million to 2.4 million with the trend in numbers exported being downwards. The future of this export trade appears to be increasingly vulnerable and uncertain, primarily because of the influence of animal welfare lobbyists. This paper uses scenario analysis to assess the impact on WA’s sheep supply chain of the termination of the live sheep export trade. The supply chain comprises three subsectors: farm production, processing/wholesale and retailing/export. The impacts of the trade termination on each of these sub-sectors are reported. These impacts are strongly linked to how producers respond to...
Tipo: Presentation Palavras-chave: Live sheep export; Animal welfare; Regional economic impacts; Industry value chains; International Relations/Trade; Livestock Production/Industries.
Ano: 2012 URL: http://purl.umn.edu/124345
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Incentive Design for Introducing Genetically Modified Crops AgEcon
Kingwell, Ross S..
The introduction of genetically modified (GM) crops raises several issues. This paper looks at incentives required to reduce problems of illegal and improper use of GM proprietary technology used in growing GM crops. A simple model of producer behaviour describes some key influences of a farmer’s response to GM crops. The model is illustrated using the example of INGARD cotton grown in Australia. The key findings are that legitimate adoption of a GM crop by a farmer depends on their attitude to risk, the relative profitability of growing the GM crop, the probability of detection of illegal or improper use of the GM crop and the severity of fines successfully imposed for fraud or contract breaches. In the case of INGARD cotton the problem of illegal and...
Tipo: Presentation Palavras-chave: Consumer/Household Economics; Crop Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/123687
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Institutional and social influences on R&D evaluation in agriculture AgEcon
Kingwell, Ross S..
Benefit‐cost analyses of R&D activity in agriculture increasingly form part of the decision‐making process of allocating R&D funds. This article describes how institutional and social influences can affect the rigour and quality of R&D evaluations. The article explores some possible mechanisms for quality control in benefit‐cost analysis so that appraisals are more likely to be accountable and credible assessments rather than false advertising or biased assessments.
Tipo: Journal Article Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1999 URL: http://purl.umn.edu/117034
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Institutional change and plant variety provision in Australia AgEcon
Kingwell, Ross S..
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2003 URL: http://purl.umn.edu/57905
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Low Emission Farming Systems: A whole-farm analysis of the potential impacts of greenhouse policy AgEcon
Kingwell, Ross S.; Metcalf, Tess.
The Australian government is introducing a Carbon Pollution Reduction Scheme in 2010, as part of its climate change policy. After 2015 agriculture may be covered by this scheme. This paper examines how different broadacre farming systems may be affected by the policy settings of this scheme. Using the bio-economic farming systems model MIDAS (Model of an Integrated Dryland Agricultural System) the impacts of the Carbon Pollution Reduction Scheme on the profitability of different broadacre farming systems in the southwest of Australia are investigated. Results show a range of profit and enterprise impacts across the various farm types. In a scenario where agriculture is not covered by the scheme, reductions in profit range from 7 to 12 percent, attributable...
Tipo: Conference Paper or Presentation Palavras-chave: Agriculture; Greenhouse gases; Economic modelling; Abatement.
Ano: 2009 URL: http://purl.umn.edu/48162
Registros recuperados: 33
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