By H. Smith, Donald Grierson
By Autar K. Mattoo (USDA/ARS/SASL, Beltsville, Maryland, USA), Jeffrey C. Suttle
By J. Monteith, Colin Webb
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 Arie H. Bartal, Yashar Hirshaut
By J. Grace
By Kenneth Manley Smith
By Roger Phillips, Sheila Grant
By Frank B. Salisbury (Professor of Plant Physiology, Department of Plants, Soils, and Biometeorology, Professor of Plant Physiology, Utah State University, USA)
By Jack Preiss
By Richard N. Strange
By John T. Arnason, etc., R.J.R. Philogene, P. Morand
By J. W. Bennett, Linda L. Lasure, Bennett, Lasure.
By R.S. Fraser
By Graham Russell (University of Edinburgh), Bruce Marshall (Scottish Crop Research Institute, Dundee), Paul G. Jarvis (University of Edinburgh)
By Charles R. Olien (Michigan State University)
By Neil C. Turner, Paul J. Kramer
By T.T. Kozlowski
By H. Smith