In article , A.Lee
writes

Putting topsoil on it is not a great idea, unless you add some grass
seed to the mix. I'd get a bag of silver sand, and some compost, mix
that up, add some seed, then distribute it over the depression, then run
a roller over it.
It is also possible to peel back a sod, and put a bit of soil
undernetah, but that is too much hard work for a dip of half an inch.
Alan.


Putting soil on top Alan, does work as long as you rake over the grass
afterwards so that you can see the tips. I did it with a patch of lawn
at the back of one of my borders. It just raises the level a bit at a
time but better than whacking down a load of compost and pressing the
new seeds into it. Even sand etc will do as long as you let the grass
come through just a bit.
--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk