@article{Souty:122859,
      recid = {122859},
      author = {Souty, Francois and Brunelle, Thierry and Dumas, Patrice  and Dorin, Bruno and Ciais, Philippe and Crassous, Renaud},
      title = {The Nexus Land-Use Model, an Approach Articulating  Biophysical Potentials and Economic Dynamics to Model},
      address = {2012-03},
      number = {824-2016-54837},
      series = {CCSD},
      pages = {53},
      year = {2012},
      abstract = {Interactions between food demand, biomass energy and  forest preservation are driving both food prices and  land-use changes, regionally and globally. This study  presents a new model called Nexus Land-Use which describes  these interactions through a generic representation of  agricultural intensification mechanisms. The Nexus Land-Use  model equations combine biophysics and economics into a  single coherent framework to calculate crop yields, food  prices, and resulting pasture and cropland areas within 12  regions inter-connected with each other by international  trade. The representation of cropland and livestock  production systems in each region relies on three  components: (i) a biomass production function derived from  the crop yield response function to inputs such as  industrial fertilisers ; (ii) a detailed representation of  the livestock production system subdivided into an  intensive and an extensive component, and (iii) a spatially  explicit distribution of potential (maximal) crop yields  prescribed from the Lund-Postdam-Jena global vegetation  model for managed Land (LPJmL). The economic principles  governing decisions about land-use and intensification are  adapted from the Ricardian rent theory, assuming cost  minimisation for farmers. The land-use modelling approach  described in this paper entails several advantages.  Firstly, it makes it possible to explore interactions among  different types of demand for biomass for food and animal  feed, in a consistent approach, including indirect effects  on land-use change resulting from international trade.  Secondly, yield variations induced by the possible  expansion of croplands on less suitable marginal lands are  modelled by using regional land area distributions of  potential yields, and a calculated boundary between  intensive and extensive production. The model equations and  parameter values are first described in detail. Then,  idealised scenarios exploring the impact of forest  preservation policies or rising energy price on  agricultural intensification are described, and their  impacts on pasture and cropland areas are investigated.},
      url = {http://ageconsearch.umn.edu/record/122859},
      doi = {https://doi.org/10.22004/ag.econ.122859},
}