In article , Franz Heymann
writes

Alan, fashion and scientific merit have little in common.
{:-))

Franz

Quite so. In fact the question put by Tumbleweed has been discussed at
length many times over the years in this group. Relevant details can be
found in the urg FAQ on organic gardening at:

http://www.nugget.demon.co.uk/MetaFA...gardening.html
--
Alan & Joan Gould - North Lincs.