There is lawn sand, which, as the name suggests, is for use on lawns only.
It is a mixture of fine sand, ammonium sulphate, and iron sulphate and has
been found effective not only against weeds, but against moss as well. It
should be spread over the whole of the lawn using a spreader - but this
method makes it impossible to use on a garden or flower bed.

Availalbe at bunnings stores. Around $12/15

Follow instructions carefully...Works well. Ive used it. May require a
couple of aplications.

"Bigbazza" wrote in message
...
Hi....Bazza from Sydney, Oz.......

I have predominately Buffalo Lawns both front and back...... They were
once ALL buffalo, but having been neglected for a few years they now have
much other things growing as well....Paspalum, Clover, etc..... Many weed
killers will also kill the buffalo when used....

I vaguely remember some years ago I used to use a mixture of sand with
Sulphate of ammonia to kill the weeds.... It used to also brown off the
Buffalo as well for a couple of weeks, and then grow quite fast as a deep
green colour, and very lush!....I don't remember much about the times of
application or even how much to use.... There may even be better ways to
restore the lawns by removal of all except the Buffalo.....Can anyone
offer suggestions?

Regards...

Bigbazza (Barry) Oz