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	Provedor de dados AgEcon (1) Scientia Agricola (1) Autor Alvares,Clayton Alcarde (1) Bathgate, Andrew D. (1) Camargo,Plinio Barbosa de (1) Crosbie, Russell (1) Finlayson, John D. (1) Hoque, Ziaul (1) Kronka,Francisco José do Nascimento (1) Martinelli,Luiz Antonio (1) Mitchell, David (1) Nalon,Marco Aurélio (1) Nordblom, Thomas L. (1) Silva,Alexandre Marco da (1) Theiveyanathan, Tivi (1) Mais... Palavra-chave Catchments (2) Bio-economic modelling (1) Dryland salinity (1) Farm systems (1) Geoprocessing (1) Land Economics/Use (1) Land management (1) Land planning (1) Linear programming (1) Rivers (1) Mais... Tipo do documento Conference Paper or Presentation (1) Info:eu-repo/semantics/article (1) Ano 2007 (2) País Brazil (1) United States (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Farm and catchment scale effects of managing dry-land salinity with pastoral and woody perennials AgEcon Finlayson, John D.; Bathgate, Andrew D.; Hoque, Ziaul; Nordblom, Thomas L.; Theiveyanathan, Tivi; Crosbie, Russell; Mitchell, David. Dry land salinisation is a significant cause of land and water degradation in Australia. Changing land use from annual to perennial crops has been widely proposed as a means to reduce land degradation and increase the productivity of saline land. However, in many areas annual crops are financially more attractive than perennial crops. Increases in perennial crops might also reduce local stream flows with adverse effects on in-stream values. As such salinity control is likely to involve significant tradeoffs between public and private costs and benefits. This paper considers the impact of planting differing areas of pastoral and woody perennials on farm profitability (P), and water (W) and salt (S) exports from the Little River catchment in New South Wales... Tipo: Conference Paper or Presentation Palavras-chave: Bio-economic modelling; Linear programming; Farm systems; Catchments; Dryland salinity; Land Economics/Use. Ano: 2007 URL: http://purl.umn.edu/10409 Historical land-cover/use in different slope and riparian buffer zones in watersheds of the state of São Paulo, Brazil Scientia Agricola Silva,Alexandre Marco da; Nalon,Marco Aurélio; Kronka,Francisco José do Nascimento; Alvares,Clayton Alcarde; Camargo,Plinio Barbosa de; Martinelli,Luiz Antonio. Information about the land cover of a region it is a key information for several purposes. This paper aimed to elaborate land-cover maps using digital satellite images obtained in 1997 from seven watersheds (Piracicaba, Moji-Guaçu, Alto Paranapanema, Turvo Aguapeí, Peixe, and São José dos Dourados) located in the State of São Paulo, southeastern Brazil. Additionaly, this study evaluated the relationship between land-cover and slopes of the terrain of the seven watersheds. A third objective was to estimate the percentage of riparian vegetation currently remaining along the streams in a 30-meter width buffer zone. Three research questions were posed: i) What is the dominant land-cover of these watersheds? ii) Is the riparian vegetation well preserved in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Land planning; Land management; Geoprocessing; Catchments; Rivers. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400003 Registros recuperados: 2 Primeira ... 1 ... Última

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