By James France, J. H. M. Thornley
By J. Monteith, Colin Webb
By R.J. Summerfield, E.H. Roberts
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)
By P.F. Wareing
By M.R. Ahuja
By M.K. van Ittersum (c/o Wageningen Agricultural University, Department of Theoretical Production Ecology, Wageningen, The Netherlands), S.C. van de Geijn (c/o Research Institute for Agrobiology and Soil Fertility (AB-DLO)
By Robert K. M. Hay, A.J. Walker
By Prof. Keith Smith
By Mark S. Mount, George H. Lacy
By N. D. G. James (Oxford University)
By Nicola Tyrer
By J. G. Atherton
By Graham A Matthews (Imperial College, UK)
By Richard N. Strange
By Harry Mussell, Richard C. Staples
By Charles R. Olien (Michigan State University)
By P.H. Li, A. Sakai
By T.T. Kozlowski
By Great Britain: Forestry Commission, G.D. Sprinthorpe, N.G. Myhill
By Jenna Woginrich
By Clover, Charles, Lawson, Andrew, Prince of Wales
By Dave Goulson
By Roger L. Lundblad (Lundblad Biotechnology, Chapel Hill, North Carolina, USA)
By Institute of Terrestrial Ecology
By Food and Agriculture Organization
By United Nations: Economic Commission for Europe
By Food and Agriculture Organization of the United Nations