By Walls, Ian G.
By G. R. Dixon
By Louise Riotte
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 Ellis, P.R., etc.
By Fern Marshall Bradley
By Matthew Biggs, John Cushnie, Bob Flowerdew, Anne Swithinbank
By Janet Thomson
By Peter Shepperd
By Thomas Leo Ogren
By Buckingham, Alan
By Carson, Rachel, Shackleton
By Agrios, George Nicholas
By Horst, R. Kenneth
By Horst, R. Kenneth, R.K.
By Bartz, Jerry A., Brecht, Jeffrey K.
By Beckett, Kenneth A.
By Jones, Richard
By Hart, I., Newton, R.W.
By Greenwood, Pippa
By Graves, George
By Ledda, Andrea
By Hussey, N.W., Scopes, Nigel Eric Anthony
By The Royal Horticultural Society
By Ford, Sarah
By Rittershausen, Sara
By Hurrion, David
By Buczacki, Stefan
By Nicholls, Jeff