By Ian Woiwod (IACR-Rothamsted, UK), Chris Thomas (University of Leeds, Don Reynolds (Natural Resources Institute, University of Greenwich, UK and Rothamsted Research, Harpenden
By Rory Hillocks (Natural Resources Institute, University of Greenwich, UK), J Thresh (Natural Resources Institute, Anthony Bellotti (Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia)