Universität Bonn

INRES Crop Science

Modelling of Farm Management

Is the modelling of farm management required when estimating grassland productivity?


Assessments or projections of crop and grassland productivity at the regional or European scales are increasingly performed for policy-making purposes. A common approach is to use crop and/or grassland simulation models. Simulations are conducted at the field-scale and their outputs are then up-scaled at the regional or European scales. Such field-scale simulations generally assume « best farming practices », farm management being seen as the systematic implementation of the most efficient combination of farming practices. In practice, due to constraints related for instance to weather or machinery availability, « best farming practices » can hardly be achieved. Difficulties of crop and/or grassland simulation models in reproducing yields at multiple sites, farms, and regions have been related to inappropriate consideration of the factors and processes, e.g. farm management, determining yield variability over space and time. The objective of this project is to evaluate the impact of modelling farm management as « best farming practices » when estimating grassland productivity at different scales (field, farm, region).

Persons in charge

Guillaume Martin


October 2010 - October 2011


Alexander von Humboldt Foundation

Cooperating partners

UMR AGIR abd ZBIAT, INRA Toulouse (http://www.toulouse.inra.fr/agir/ and http://carlit.toulouse.inra.fr/wikiz/index.php/  )


Martin, G., M. Duru, J. Schellberg, F. Ewert, 2012. Simulations of plant productivity are affected by modelling approaches of farm management. Agricultural Systems 109, 25-34. DOI:10.1016/j.agsy.2012.02.002.

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