Institution: | a Plant Production Systems Group, Wageningen University, P.O. Box 430, 6700 AK Wageningen, The Netherlands b Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR System CIRAD-INRA-SupAgro, 2 Place Viala, Bât. 27, 34060 Montpellier Cedex 1, France c Plant Research International, Wageningen University and Research Centre, P.O. Box 616, 6700 AP Wageningen, The Netherlands d Netherlands Environmental Assessment Agency (PBL), Global Sustainability and Climate, P.O. Box 303, 3720 AH Bilthoven, The Netherlands e Crop Science Group, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, D-53115 Bonn, Germany |