1. Wageningen University and Research Centre; Land Dynamics Group; P.O. Box 47 6700 AA Wageningen the Netherlands
2. Wageningen University and Research Centre; Plant Research International; P.O. Box 16 6700 AA Wageningen the Netherlands
3. Wageningen University and Research Centre, Alterra; P.O. Box 47 6700 AA Wageningen the Netherlands
4. Wageningen University and Research Centre; Animal Sciences Group; P.O. Box 65 8200 AB Lelystad the Netherlands
5. Wageningen University and Research Centre; Biological Farming Systems Group; Marijkeweg 22 6709 PG Wageningen the Netherlands
6. Wageningen University and Research Centre; Social Sciences Group; Hollandseweg 1 6706 KN Wageningen the Netherlands
7. Wageningen University and Research Centre; P.O. Box 47 6700 AA Wageningen the Netherlands