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Positive Mathematical Programming (PMP) models of agricultural supply have been popularised by Howitt (1995b) and used extensively in policy analysis, to predict the response of agricultural systems facing resource, technology and policy constraints to exogenous shocks. The models are typically calibrated against observed regional—e.g., in the U.S., county-level or state-level—cropping patterns and...
Nitrogen is a key element to ensure modern agriculture’s output, sustaining global food, feed, fibre and now bio-energy production. But it also accounts also for, or at least contributes to, key environmental problems that challenge the well functioning of today’s societies (Sutton et al. 2011). One molecule of nitrogen can contribute to one or many environmental problems, including eutrophication,...
Réunion Island is a French overseas territory in the Indian Ocean which provides a distinctive research opportunity to develop a regional bio-economic model for the dairy industry. The model aims to address questions related to social, economic and environmental priorities of the local dairy industry. Since Reunion is an island it is a natural closed system for various components of the models such...
The 4.3 million French suckler cows represent more than one third of all European suckler cows and supply around 60% of the beef production in France. They also participate in rural development, as few economic alternatives to livestock farming exist in these production areas and they help in maintaining large areas under grassland which favors biodiversity and limits pollution and erosion (Le Goffe...
Water resource management is an inherently complex, multi-scale and multi-disciplinary process involving many interdependent components. As each of these components is the focus of several socio-economic and scientific disciplines, an approach that crosses disciplinary boundaries is needed to provide constructive input to policy making. Scientific approaches have been developed that study the complex...
Agricultural land use changes are one of the most important drivers for biodiversity losses on a global scale. They are induced among others by intensification processes such as increased nitrogen application rates and mechanization as well as by field consolidations leading to the loss of semi-natural habitats. In Europe, agri-environmental programs have been implemented to lessen the threats on...
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