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	Provedor de dados 31 (2) 73 (1) Autor Adams, Richard M. (1) Huber,Anton (1) Kling, Catherine L. (1) Oyarzún,Carlos E. (1) Ramilan, Thiagarajah (1) Scrimgeour, Frank G. (1) Tanaka, Katsuya (1) Wu, JunJie (1) Mais... Palavra-chave Non-point pollution (3) Environmental Economics and Policy (2) Agricultural policy (1) Conservation practices (1) Green payments (1) Heterogeneity (1) Land Economics/Use (1) Land use changes (1) Landuse (1) Marginal abatement cost (1) Native forest (1) Nitrate runoff and leaching (1) Nitrogen fluxes (1) Soil erosion (1) Tradable discharge permits (1) Mais... Tipo do documento Conference Paper or Presentation (1) Journal article (1) Working or Discussion Paper (1) Ano 2006 (1) 2003 (2) País United States (2) Chile (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última NITROGEN EXPORT FROM FORESTED AND AGRICULTURAL WATERSHEDS OF SOUTHERN CHILE 73 Oyarzún,Carlos E.; Huber,Anton. Measuring nutrients fluxes in watersheds with different landuse is important for evaluating the effects of conversion of native forests to agricultural land, and for establishing guidelines for land management. Nitrogen (N) concentrations and fluxes were studied over a 12-month period in four watersheds in the Lake Rupanco basin in the Andean Cordillera and four watersheds located in the Lake Huillinco basin in the Coastal Cordillera of southern Chile. Two watersheds in either lake basins were covered mainly by native rainforests, and the other two had mixed landuse (livestock pastures, subsistence agriculture and shrub-pasture mixtures). In the Lake Rupanco area, the annual transport of NO3-N from forested and agricultural watersheds was 4.9 and 11.0 kg... Tipo: Journal article Palavras-chave: Landuse; Native forest; Nitrogen fluxes; Non-point pollution. Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100010 ASSESSING THE COSTS AND ENVIRONMENTAL CONSEQUENCES OF AGRICULTURAL LAND USE CHANGES: A SITE-SPECIFIC, POLICY-SCALE MODELING APPROACH 31 Wu, JunJie; Adams, Richard M.; Kling, Catherine L.; Tanaka, Katsuya. The growth in federal conservation programs has created a need for policy modeling frameworks capable of measuring micro-level behavioral responses and macro-level landscape changes. This paper presents an empirical model that predicts crop choices, crop rotations, and conservation tillage adoption as a function of conservation payment levels, profits, and other variables at more than 42,000 agricultural sites of the National Resource Inventory (NRI) in the Upper Mississippi River Basin. Predicted changes in crop choices and tillage practices are then fed into site-specific environmental production functions to determine changes in nitrate runoff and leaching and in water and wind erosion at each NRI site. This policy-scale model is applied to the case of... Tipo: Working or Discussion Paper Palavras-chave: Agricultural policy; Conservation practices; Green payments; Land use changes; Nitrate runoff and leaching; Non-point pollution; Soil erosion; Environmental Economics and Policy; Land Economics/Use. Ano: 2003 URL: http://purl.umn.edu/18475 Abatement Cost Heterogeneity and its Impact on Tradable Nitrogen Discharge Permits 31 Ramilan, Thiagarajah; Scrimgeour, Frank G.. Nitrogen discharge into the Waikato River has been identified as the primary source of potential water quality degradation. Rising nitrogen levels in water are attributed to non point source pollution from agricultural activities. Pastoral farming is the predominant agricultural land use in the catchment. Increased nitrogen fertilizer use and higher stocking rates have the potential to increase the nitrogen loading into water. There is a range of best management practices and policies proposed to reduce nitrogen discharge from farming systems. Water quality trading is a policy tool that could improve the cost effectiveness of achieving environmental goals. Economic theory suggests that tradable pollution permit systems encourage polluters to reallocate... Tipo: Conference Paper or Presentation Palavras-chave: Heterogeneity; Tradable discharge permits; Non-point pollution; Marginal abatement cost; Environmental Economics and Policy. Ano: 2006 URL: http://purl.umn.edu/31972 Registros recuperados: 3 Primeira ... 1 ... Última

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