http://www.permies.com/forums
http://midwestpermaculture.ning.com
Companion Planting:
http://en.wikipedia.org/wiki/List_of_companion_plants
Soil:
http://soils.usda.gov/SQI/concepts/soil_biology/biology.html
http://www.hort.cornell.edu/soilhealth/extension/manual.htm
Forest Gardening:
http://www.forestgardening.net/
