How many people can land support?

[bigpaul]

first of all Mick dont base your survival on any film (or online game) its only fiction and nothing like real life will be WTSHTF.
secondly, any survivors in the city will be in a bad state and most of the masses have no idea where their food comes from or how it is reared or grown, they just expect it to be in the supermarket when they want it.
thirdly, how are they going to cook it(provided they even know how to) once the power grid goes down.
4th. forget the "golden horde" theory, thats okay for films and books, but in real life it wont happen, those areas just outside of a city will have a problem with looters but further out is the place to be.