There's a film that's been going around by word of mouth called Back to Eden, it's basicly a documentary. You can watch it for free on its homepage website backtoedenfilm.com at the bottom.
This is a permaculture/ hugulculture/ minimal labor/ affordable/ organic method that involves nothing except wood, compost, and little to no rain if done right. I'd like to hear what others think and how they've tried it.
I like the idea about not tearing the ground up and tearing out roots and exposing the dirt. The modern way seems to destructive and labor intensive. I tore some ground last year in a place that gets 70'' of rain per year and now its sandy and dry as arizona. I like the idea of leaving roots in the ground and using raised beds.
(this is a photo, disregard the hose, that isn't needed if done the backtoeden way)
My uncle showed me a real neat way to grow year round by digging below the frostline 2 or 3 feet and placing several pots under a plastic white cover. Worked well and felt warm under there. Basicly an alternative to a greenhouse, the cost is the plastic and labor to dig it.
In an shtf situation you wouldn't have all the fertilizer and soil and as much water and energy to put into growing something.