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| Cacho, Oscar J.; Greiner, Romy; Fulloon, Lachlan. |
| Large areas of agricultural land under conventional crops and pastures are at risk of dryland salinisation in Australia. The salinisation problem can be controlled by strategic and large‐scale planting of trees; however, farm forestry enterprises evaluated with conventional discounting techniques do not generally rank as an attractive alternative to annual crops on productive land. In this article, an optimal control model that explicitly accounts for decline or improvement in land quality over a period of 40 years is presented. The optimal area planted to trees and the optimal groundwater‐table trajectory through time are determined under a variety of scenarios. Implications of the results for policy design are discussed. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/117391 |
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| Greiner, Romy. |
| The proposal for a 64,000 hectare expansion of the Ord River Irrigation Area is one example of the renewed interest in agricultural development in the tropical north of the Australian continent. Thirty five years ago Bruce Davidson provided conclusive ‘evidence’ that agricultural development in this region was not financially sustainable unless supported by ongoing government subsidies. He argued that this conclusion was unlikely to change in the future. This paper outlines the controversy over past and proposed agricultural developments and explains the role of agriculture in the Kimberley economy today and in relation to other natural resource based industries. In a time when the paradigm of sustainable development recognises ‘quality of life’ and... |
| Tipo: Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2000 |
URL: http://purl.umn.edu/123655 |
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| Greiner, Romy. |
| Land affected by a high water table displays waterlogging and salinity effects. This causes costs to farmers through additional land management problems, loss of soil productivity and results in a decline of the farm's capital value. A multi-period mathematical model is developed to investigate best land and financial management strategies for such farms. Water tables rise mainly due to ground water import caused by high recharge in the surrounding parts of the catchment. The hydrological connection between model farm and catchment is established through the variable "condition of the upper aquifer". This paper analyses the effects of different levels of ground water import in terms of progress of soil salinisation, associated farm management responses and... |
| Tipo: Journal Article |
Palavras-chave: Land Economics/Use. |
| Ano: 1996 |
URL: http://purl.umn.edu/12301 |
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| Gregg, Daniel; Greiner, Romy. |
| The adoption of conservation practices is a complex matter – rural landholders consider a wide variety of factors and characteristics when deciding whether to adopt a conservation practice. To confound the issue, recent research has suggested that the goals of landholders affect the adoption of conservation practices by creating a subjective consideration of the relative importance of impediments and effectiveness of incentives in the adoption decision. In this research we describe an empirical link between graziers’ goals and their perceptions of the relative importance of impediments and the effectiveness of incentives in the adoption of conservation practices. The research was carried out in the tropical savannas region of Australia where pastoral... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Graziers; Goals; Conservation; Tropical savannas; Impediments; Incentives; Crop Production/Industries. |
| Ano: 2009 |
URL: http://purl.umn.edu/49923 |
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| Cacho, Oscar J.; Fulloon, Lachlan; Greiner, Romy. |
| Dryland salinity emergence is an important land degradation problem in Australia. Large areas of agricultural land where conventional crops and pastures are produced are at risk. The salinisation problem can be controlled by planting trees in conjunction with crops, but a disadvantage of growing trees as a farm enterprise is the long lag between planting and harvest. When farm forestry enterprises are evaluated with conventional discounting techniques they do not generally rank as an attractive alternative to annual crops on productive land. In this paper, a dynamic model that explicitly accounts for decline or improvement in land quality over a period of 40 years is presented. The model is solved for a hypothetical farm on the Liverpool Plains of NSW. The... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Soil salinity; Farm forestry; Dynamic modelling; Farm Management; Land Economics/Use. |
| Ano: 1999 |
URL: http://purl.umn.edu/12895 |
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