Thanks to all who answered my post. I am looking forward to getting started.
Valerie.

Please help me. The owner of my property before me had a cat that seemed to urinate all over the back lawn and the grass is really patchy and looks nasty. How can i fix the problem cheaply??? is there a home remedy i can use.

Hi Charlotte

Assuming it is the cat, then flushing away the urine with water. Then re-seeding with grass seed (nearest in type to your lawn). Protecting the germinating seed with netting and canes (against birds and cats) would be cheapest option.

Last year I killed off the old lawn, rotovated the soil, levelled the ground with 4-6" mix top soil/sharp sand/multi purpose compost. I then seeded heavily the soil with luxury grass seed.
Mid October I had a lush, green, fine bladed grass though the grass appeared sparse.
By April 2007 the longer grass before mowing is green and still relatively sparse, but when mowed reveals an underlying mat of dried out/dead brown finer bladed grass. It does not appear to be thatch.
I think perhaps the soil was not sufficiently compacted and had too much compost in the top inch or so causing excessive drainage.
Any ideas what I can do please?

I want to get rid of my back lawn completely, but I just don't know where to start or what tools to use! Please can anyone give me any tips.

I used a diluted mix of "Roundup" which I applied with a sprayer. After 2 weeks the grass was dead, but I left it a week or so longer and it was easily raked off with a garden rake. Any more stubborn patches left were scraped off with a spade. Alternatively you can burn the dead grass off to save the raking and scraping (and apply potash at the same time!).
As Roundup is systemic the roots will be dead as well, and you should be left with bare soil. No real effort involved.

how can i stop my dog weeing on my lawn and making my grass going yellow i heard you can but something in the dogs water to stop the dogs wee killing my grass.

Hope you can help me.........
My front lawn has been invaded by ants, i have about 6 ant hills on it.Which when i cut it because the "hills" are raised up i end up with mud patches on it.I have tried flattening them down first by standing on them but the ants keep coming back.What can i do to get rid of them without damageing the grass?