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	Provedor de dados AgEcon (2) Autor Dowling, Peter (2) Jones, Randall E. (2) Vere, David T. (1) Palavra-chave Research and Development/Tech Change/Emerging Technologies (2) 160 (1) Annual grass weeds (1) Benefit cost analysis (1) Bioeconomic modelling (1) Dynamic programming (1) Externalities (1) Perennial pasture (1) Q160 (1) Research evaluation (1) Sustainability (1) Vulpia (1) Mais... Tipo do documento Report (2) Ano 2004 (2) País United States (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Sustainability, Externalities and Economics: The Case of Temperate Perennial Grazing Systems in NSW AgEcon Jones, Randall E.; Dowling, Peter. The replacement of perennial grass species by undesirable annual grass weeds not only results in lower productivity but is also contributes to a range of external costs. In particular, shallow rooted annuals result in greater deep drainage and therefore a greater potential for salinity, and greater volumes of runoff of poor quality water to streams. In this paper an economic framework for examining the sustainability issues of a perennial grazing system on the NSW Central Tablelands is presented. This involves a combination of simulation and dynamic programming models, with the state of the system represented by variables for the perennial grass composition and soil fertility. The paper examines a range of management strategies that increase the perennial... Tipo: Report Palavras-chave: Perennial pasture; Sustainability; Externalities; Bioeconomic modelling; Dynamic programming; Research and Development/Tech Change/Emerging Technologies; 160. Ano: 2004 URL: http://purl.umn.edu/42504 An Economic Evaluation of Research into the Improved Management of the Annual Grass Weed Vulpia in Temperate Pastures in South-Eastern Australia AgEcon Vere, David T.; Jones, Randall E.; Dowling, Peter. NSW Agriculture has a history of research investment in managing weed problems in the temperate pasture areas. One focus of that research has been on the development of improved management practices for the major annual grass weed vulpia. Recent surveys have found that weeds comprised up to 80% of pasture biomass in some temperate areas and that typical vulpia contents are between 30 and 40% of pasture biomass. Temperate pasture degradation is recognised as being a major contributor to the wider environmental problems of soil erosion, salinity and acidity. This evaluation related to a project (1996-2002) that focussed on the vulpia problem in the New South Wales temperate pasture areas. The benefits of that research were measured as the difference in the... Tipo: Report Palavras-chave: Benefit cost analysis; Research evaluation; Annual grass weeds; Vulpia; Research and Development/Tech Change/Emerging Technologies; Q160. Ano: 2004 URL: http://purl.umn.edu/42503 Registros recuperados: 2 Primeira ... 1 ... Última

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