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| Brunstad, Rolf Jens; Gaasland, Ivar; Vardal, Erling. |
| Without support, the levels of agricultural public goods will fall short of the demand in high cost countries like Norway, Finland and Iceland. However, as demonstrated in this paper using Norway as a case, the current support and agricultural activity is far out of proportions from a public goods perspective. Model simulations show that at most 40% of the current support level can be defended by the public good argument. Furthermore, the present support, stimulating high production levels, is badly targeted at the public goods in question. Since agricultural land is a major component of both food security and landscape preservation, thus giving rise to a high degree of cost complementarities between the two public goods, it would be more efficient to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Food security; Landscape preservation; Public goods; Agricultural policy; Numerical model; Food Security and Poverty; Land Economics/Use. |
| Ano: 2005 |
URL: http://purl.umn.edu/24470 |
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| Bortolotto, Orcial Ceolin; Menezes Junior, Ayres de Oliveira; Hoshino, Adriano Thibes; Campos, Thiago Augusto. |
| This study aimed to evaluate the influence of the distance from the edge of native forests on the abundance of aphidophagous hoverflies in wheat fields. The study was conducted in four commercial fields in the North of Paraná State, Brazil, during the wheat crop season of 2009. Two transects were surveyed parallel to the edge of the forest at two distances: 25 (“near”) and 525 meters (“far”) from the edge. The abundance of hoverflies was compared using a χ2 test (p ≤ 0.05). In total, 1,845 hoverflies adults were collected, which represented 15 species and three genera. The most abundant species was Allograpta exotica (60.43%), followed by Toxomerus dispar (17.78%) and Toxomerus watsoni (7.26%) (Diptera: Syrphidae). An important inference was that all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Fitossanidade; Entomologia Agrícola conservative biological control; Predators; Wheat pests; Landscape preservation; Refuge area. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27711 |
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