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| Baird, Catherine A.; Gyles, Oliver. |
| An early-mid project evaluation of the benefits and costs of the Tragowel Plains Salinity Management Plan estimated the net cost after six years at A$ 5.5 million. The cumulative cash flows for the water transfer, drainage and halophyte programs were all positive with benefit to cost ratios (BCRs) of 3.2, 1.3 and 1.1. Inclusion of estimated future benefits and costs to year 30 gave BCRs of 13.7, 1.3 and 4.0 with net present values (NPVs) of A$ 18.8 million, 2.5 million and 0.4 million respectively. Net costs for other integrated programs including salinity survey, whole farm planning, facilitation of structural adjustment, revegetation and coordination of implementation reduced the NPV of the first six years of implementation to A$ 12.1 million. The water... |
| Tipo: Presentation |
Palavras-chave: Salinity; Structural adjustment; Water transfer; Water market; Tragowel Plains; Resource /Energy Economics and Policy. |
| Ano: 1999 |
URL: http://purl.umn.edu/123760 |
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| Gaffy, Joe; Gyles, Oliver. |
| An optimisation model was developed to compare the profitability of different forage species on irrigated dairy farms. The model is driven by the energy and protein requirements of the milking cow. The objective of the model is to maximise income, after herd and feed costs, by selecting the area of the farm sown to particular forage species. Different forage species may require different animal production systems to optimise their profitability. In order to achieve this, the model can alter the herd size and structure, level of production, concentrate feeding regime and forage conservation and feeding on a monthly basis. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Dairy cows; Modelling; Forage.; Farm Management. |
| Ano: 2003 |
URL: http://purl.umn.edu/57869 |
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| Gyles, Oliver; Mahoney, Cynthia C.; Brown, Stuart; Gibb, Ian. |
| Consultation with industry identified a range of knowledge and information management tools required for building decision support systems (DSSs) that can help guide sustainable development of irrigated dairy production in the Murray Region. Individual production systems vary in complexity and input intensity and are coupled with the unique business and lifestyle goals of farm families. While single issue focussed decision support tools are limited to promoting understanding of single factor responses, the relevant opportunity costs for resources must be considered. Thus a whole farm perspective for DSSs is required to assist farm business managers optimise the profitability of production and development given the range of technical options, market... |
| Tipo: Presentation |
Palavras-chave: Agribusiness; Livestock Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/123656 |
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| Gyles, Oliver. |
| A false expectation based on the notion that it is easy to raise water use efficiency, and that all increases in water use efficiency will also increase net social welfare, will lead to gross underestimation of the economic impact of reduced irrigation allocations in the Murray-Darling Basin. A conventional benefit:cost analysis of policy options founded on an understanding of biophysical processes, sound accounting principles, a knowledge of the appropriate response functions and the economics of best operating conditions will reduce the potential for government failure. Some myths, pitfalls and traps for the unwary analyst or policy maker are outlined. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Irrigation; Water use efficiency; Policy; Net social welfare.; Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/57880 |
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