I can now answer my own question by referring you all to an expert who can
be found at ..
http://aggie-horticulture.tamu.edu/p..._problems.html

Vic

"Vic" wrote in message ...
Around the dead centre of a burn there develops a lush green perimeter.
Does
anybody know the formulation of this "treatment" I don't fancy following
our
dog around with a bowl. I have tried various lawn tonics but they don't
have
the same result. Tried dilute sulphate of ammonia. Regards Vic