By Karen Bush, Claire Colvin
By Helmut F. van Emden (University of Reading)
By James Herriot
By Horst Marschner (Universitat of Hohenheim, Germany)
By John R. Archer
By G. W. Cooke
By T. J. Marshall, J. W. Holmes
By Maurice Bonneau, Bernard Souchier, V.C. Farmer
By Helen Rebanks
By D.A. Cooke, R.K. Scott
By Great Britain: Agricultural, Development and Advisory Service, Great Britain: Ministry of Agriculture, Fisheries and Food
By Albert L. Smit, A.G. Bengough, Chris Engels, M. Van Noordwijk, S. Pellerin
By Jim Waller (CABI Egham, Surrey, UK), Jillian Lenne (Consultant in Agricultural Research and Development, UK and Editor in Chief, Field Crops Research), Sarah Waller
By J. S. Nix
By D. Britton
By P.H. Li
By D.S. Jenkinson, K.A. Smith
By IAEA
By Philip Lymbery
By Coe, Catherine
By Xavier Bonnefoy, H. Kampen, Kieran Sweeney
By Christy Campbell
By Dana L. Jackson, Laura Jackson, Nina Leopold Bradley
By Chris Ashton
By Gordon Conway
By J. G. Wilson
By G. Cornelis Van Kooten, Erwin H. Bulte
By David Hutson, T.R. Roberts