I am considering trying to reclaim for agriculture a 4-acre field. It was going to be a housing estate, but once the boom burst in Ireland the builder went bankrupt. The top soil in the former agricultural land was stripped, and seems to have been then covered in a gravel cover. The field now is a mixture of some housing foundations (about 6-7). I was looking for advice on how much topsoil would be needed, and if you could just cover the gravel with topsoil, or would you need to remove the gravel first etc. I have been looking at some strange stuff on how to recover old-mining sites, but can't seem to find any definite information. I could just not be using the correct terms - the internet is a big place!
I need your help!!!