[Arid_gardener] Question from Home-Hort WWW page

[koregirl4 at yahoo.com]

mary fritz
85381
koregirl4 at yahoo.com

I am wanting to start a vegetable garden in my back yard.  I'm looking at a space of about 30 feet by 40 feet in my grassy yard that is irrigated every two to four weeks.  I would like to know the process of getting rid of the top layer (bermuda and clover grass) and preparing the soil for planting.  How deep do I need to go?  Do I add other kinds of soil/nutrients, etc?  Is clean fill dirt ok to add?  Help, please.
Thank you!