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| Groeneveld, Rolf A.; Wesseler, Justus; Berentsen, Paul B.M.. |
| Isolation distances to limit the risk of cross-pollination from transgenic to nontransgenic crops can severely limit the potential use of transgenic crops through a so-called 'domino effect' where a field of non-transgenic crops limits adoption of transgenic crops not only on plots in its direct vicinity, but also in plots further away as its neighbors are forced to grow the non-transgenic varieties, forcing their neighbors to grow the non-transgenic variety, and so on. The extent to which this effect takes place, however, may depend crucially on the type of farm. For example, dairy farms can use grassland as a buffer between transgenic and conventional maize plots. This article assesses the effects of isolation distances for transgenic maize in dairy... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries; Livestock Production/Industries. |
| Ano: 2011 |
URL: http://purl.umn.edu/114595 |
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| Schrijver, R.A.M.; Berentsen, Paul B.M.; Groeneveld, Rolf A.; Corporaal, A.; de Koeijer, T.J.. |
| ‘Farming for Nature’, a relatively new policy instrument being tried out in the Netherlands, is evaluated. The concept has been designed to allow dairy farmers to improve nature conservation on their farms. Under the scheme, no manure, fertilizer, or feed – concentrates or roughage - may be imported into farm systems from external sources. The feasibility of such a self-sustaining system and the conditions required for it to deliver the desired results, are explored with a farm-based linear programming model known as FIONA (Farm based Integrated Optimization Model for Nature and Agriculture). The model is explained and applied to ‘de Langstraat’, a region in southern Netherlands. The results show that levels of production under the ‘Farming for Nature’... |
| Tipo: Journal Article |
Palavras-chave: Nature management; Dairy farming system; Linear programming; Farm-economics; Farm Management; Land Economics/Use. |
| Ano: 2006 |
URL: http://purl.umn.edu/97194 |
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| Kuhlman, Tom; van Tongeren, Frank W.; Helming, John F.M.; Tabeau, Andrzej A.; Gaaff, Aris; Groeneveld, Rolf A.; Koole, Boudewijn; Verhoog, A. David; Dekkers, Jasper. |
| Analyses of the impact of European policies on agricultural change are most often based on agricultural sector models. Such models have their limitations: they cannot specify the interaction between agriculture and the rest of the economy, and their spatial dimension is usually limited. Land use simulation models, on the other hand, usually depend on other models for assessing the demand for land. The consistency of those models with the assumptions and databases of the land use model is often not examined. This article reports on a research project where the links between a macroeconomic model, an agricultural sector model and a land use model were explicitly explored in order to arrive at a consistent model chain. This integrated framework was put to the... |
| Tipo: Journal Article |
Palavras-chave: Land use; CAP; Agricultural policy analyses; Netherlands; Agricultural and Food Policy; Land Economics/Use. |
| Ano: 2006 |
URL: http://purl.umn.edu/97190 |
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