I would also recommend anything by Joel Salatin (http://www.polyfacefarms.com/library.aspx), who farms in Virginia (and was featured in Pollan's book). A quote from a Mother Jones interview:
This fundamental understanding drives our production models. Herbivores in nature do not eat dead cows, chicken manure, dead chickens, grain or silage: They eat fresh or dried forage. Of course, what’s neat is that empirical data is discovering the nutritional and ecological benefits of this paradigm. We’re reading about Omega 3 and Omega 6 balance, conjugated linoleic acid, polyunsaturated fats and riboflavin. Whenever a new laboratory confirmation of our philosophy hits the news, we make sure our patrons know about it. In a word, this is all about healing: healing our bodies, healing our economies, healing our communities, healing our families, healing the landscape, healing the earthworms. If it’s not healing, it’s not appropriate.
This fundamental understanding drives our production models. Herbivores in nature do not eat dead cows, chicken manure, dead chickens, grain or silage: They eat fresh or dried forage. Of course, what’s neat is that empirical data is discovering the nutritional and ecological benefits of this paradigm. We’re reading about Omega 3 and Omega 6 balance, conjugated linoleic acid, polyunsaturated fats and riboflavin. Whenever a new laboratory confirmation of our philosophy hits the news, we make sure our patrons know about it. In a word, this is all about healing: healing our bodies, healing our economies, healing our communities, healing our families, healing the landscape, healing the earthworms. If it’s not healing, it’s not appropriate.