Lerk's suggestion of incidental land use

take unused stretches along highways, (you know that space that mowers and bushhogs constantly have to go over) and allow the poor to plant and harvest crops there, with some help from local agriculture experts.
Additionally, on all public land, only plant trees and plants that bear edible fruit, instead of ornamental trees and flowers. Allow the poor to help in gathering, canning, distributing, etc. in return for part of the bounty.

Or if Bush is hellbent to have faith initiatives, have churches make pies and breads and other staples from all the harvests on incidental unused land to feed the homeless and poor.

If even only the medians on city streets were planted with blackberry bushes, there would be a large enough readily available sustenance for homeless at least for part of the year.

there is a great deal of incidental land doing nothing except being mowed all over the US, and it would cost very little to plant things that bear fruit or grain.

Even if it was haphazard farming, whatever it yielded would be more than places have now.

at a premium

welfare slavery for profit

the fields for the poor to pick up as "gleaners."