•Humanity's industrialized food production depends heavily on fertilizers and chemicals made from oil.
•Expect you less and less be able to shop for groceries, and that you may increasingly need to subsist solely on what you grow yourself.
•Ecology Action »Research by organizations such as Ecology Action, which is available in books authored by John Jeavons, demonstrate techniques that may let you grow a healthy diet of crops in an area as small as 1,000 sq.ft. per person. These techniques take effort, and time though, if you're not starting with soil that is healthy and productive.
•Plants for the Future »The present commercial food system has focused on only a few varieties of the thousands of different food plants, and within those few in use, entire crops may be essentially identical clones. A good resource for plants suited for your location is the online database maintained by Plants for a Future.
•Food Storage »Your food program must contemplate the situation where, despite your best efforts, you lose an entire crop. You therefore need a food storage program that can "tide you over" until your garden is again able to sustain you. While your program must meet your personal taste and resources, good guidelines are available at this URL.
•Not everyone will have success with everything they attempt to grow, or with a gardening program overall. You should consider appropriate crop "surpluses" for barter materials. Such exchanges may help rebuild interdependence and cooperation within your immediate community, assisting in development and security.