By Roger Balls
By James L. Brewster (Horticulture Research International, Wellesbourne, UK)
By F.S. Hardy, G.D. Watson
By G. R. Dixon
By Richard J. Chancellor
By Hamilton, Geoff
By Brickell, Christopher
By Magdalena, Carlos
By Adams BSc (Agric) Hons MIHort Dip Applied Ed, C R, Bamford BSc Hons (Agric Sci) Cert Ed, K M, Early MSc BSc Hons DTA Cert Ed, M P
By Marzluff, John M.
By Leeuwis, Cees
By McHoy, Peter
By Buczacki, Dr Stefan
By Kepler, Kay Angela, Mau, Jacob R.
By Pacey, Arnold
By Tim Smit
By Arter, Elisabeth, Woodward, John
By Emmons, Robert D.
By Northen, Rebecca Tyson
By Baines, Chris
By Boland, Maureen, Boland, Bridget
By Collett, Gerald, Bowe, Patrick
By Mackenzie, J D S, Light, MARILYN
By Dupriez, Hugues, Leener, Philippe De, de Leener, Philippe
By Bartz, Jerry A., Brecht, Jeffrey K.
By Peter Dawson
By Adrian Slack