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Registros recuperados: 7
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ADOPT: a tool for predicting adoption of agricultural innovations AgEcon
Kuehne, Geoff; Llewellyn, Rick S.; Pannell, David J.; Wilkinson, Roger; Dolling, P.; Ewing, Michael A..
A wealth of evidence exists about the adoption of new practices and technologies in agriculture but there does not appear to have been any attempt to simplify this vast body of research knowledge into a model to make quantitative predictions across a broad range of contexts. This is despite increasing demand from research, development and extension agencies for estimates of likely extent of adoption and the likely timeframes for project impacts. This paper reports on the reasoning underpinning the development of ADOPT (Adoption and Diffusion Outcome Prediction Tool). The tool has been designed to: 1) predict an innovation‘s likely peak extent of adoption and likely time for reaching that peak; 2) encourage users to consider the influence of a structured...
Tipo: Conference Paper or Presentation Palavras-chave: Adoption; Diffusion; Prediction; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011 URL: http://purl.umn.edu/100570
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Book reviews AgEcon
Lal, Padma; Llewellyn, Rick S.; Nightingale, John J.; Godden, David P..
Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2003 URL: http://purl.umn.edu/116181
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Effective information and the influence of an extension event on perceptions and adoption AgEcon
Llewellyn, Rick S.; Lindner, Robert K.; Pannell, David J.; Powles, Stephen B..
Perceptions are known to play an important role in the innovation adoption decision. Once influential perceptions have been identified, there is the potential for information to influence adoption by changing these perceptions. In this paper, the influence of an extension workshop targeting grain growers’ perceptions known to be associated with the adoption of integrated weed management and herbicide resistance management has been measured using regression analysis. Consistent with a Bayesian learning framework, the greatest influence on grower perceptions and intended adoption behaviour was observed where information could be delivered with a high degree of certainty and validity.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Farm Management.
Ano: 2003 URL: http://purl.umn.edu/57911
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Factors influencing adoption of conservation tillage in Australian cropping regions AgEcon
D'Emden, Francis H.; Llewellyn, Rick S.; Burton, Michael P..
The purpose of this research is to improve understanding of conservation tillage adoption decisions by identifying key biophysical and socio-economic factors influencing no-till adoption by grain growers across four Australian cropping regions. The study is based on interviews with 384 grain growers using a questionnaire aimed at eliciting perceptions relating to a range of possible long- and short-term agronomic interactions associated with the relative economic advantage of shifting to a no-tillage cropping system. Together with other farm and farmer-specific variables, a dichotomous logistic regression analysis was used to identify opportunities for research and extension to facilitate more rapid adoption decisions. The broader systems approach to...
Tipo: Article Palavras-chave: Adoption; Conservation tillage; Herbicide resistance; No-till; Perceptions; Weed management; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/118537
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Revisiting N fertilisation rates in low-rainfall grain cropping regions of Australia: A risk analysis AgEcon
Monjardino, Marta; McBeath, T.; Brennan, Lisa E.; Llewellyn, Rick S..
Mallee farmers minimize downside risk in dry seasons by applying low rates of nitrogen (N) fertiliser to their cereal crops. The opportunity to respond to and capitalize on the better years is further limited as most inputs are applied upfront at sowing. We used an economic-risk decision model to identify a range of tactical N fertilisation options that increase net returns, while minimising risk for farmers with different risk attitudes. Importantly, we concluded that when accounting for long-term risks affecting farmers, the use of higher N rates can play a risk-reducing role in a highly variable environment like the Mallee.
Tipo: Presentation Palavras-chave: Nitrogen; Risk; Variance; Crop simulation; Economic net returns; Decision analysis; Zone management; Monte Carlo; Mallee; Crop Production/Industries; Risk and Uncertainty.
Ano: 2012 URL: http://purl.umn.edu/124339
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Social Costs of Herbicide Resistance: The Case of Resistance to Glyphosate AgEcon
Marsh, Sally P.; Llewellyn, Rick S.; Powles, Stephen B..
Unlike in the pesticide and antibiotic resistance literature, potential social costs and externalities associated with herbicide resistance have not generally been considered by economists. The economics of managing herbicide resistance in weeds has focused on cost-effective responses by growers to the development of resistance at the individual farm and field level. Economic analyses of optimal herbicide use have focused on optimising farmer returns in the long run. Weeds have been considered less mobile, compared to insects and diseases, suggesting that externalities resulting from resistance spread will be minimal and any consequent social costs low. Glyphosate is the world's most widely used broad-spectrum non-selective herbicide. Declining glyphosate...
Tipo: Conference Paper or Presentation Palavras-chave: Glyphosate resistance; Herbicide resistance; Social costs; Externalities; Resistance mobility; Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/25413
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The Benefits and Beneficiaries of "Public" Investment in Herbicide Use Research and Development AgEcon
Crowe, Bronwyn; Lindner, Robert K.; Llewellyn, Rick S..
The allocation of benefits from research and development of new herbicide uses is dependent on patent status. The agricultural chemical industry will preferentially invest in herbicide R&D that increases the use of on-patent herbicides from which a company can capture a price premium. The distribution of benefits from increased use of on-patent herbicide will alter over time, with grain growers benefiting at the expense of agrichemical companies once the patent expires. Public sector investment in herbicide R&D may also benefit the agrichemical industry. The size and allocation of the benefits from R&D into on-patent herbicides is analyzed using economic surplus techniques. Two case studies are examined. One involves research into the choice...
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Q16; Q18; Q28.
Ano: 2006 URL: http://purl.umn.edu/25330
Registros recuperados: 7
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