Planet organic
economist.com
economist.com
Coversely, I hope we can have a good discussion as to how different types of farming effect our ability to produce food. These sites might be a good starting point:
http://www.sarep.ucdavis.edu/Concept.htm http://en.wikipedia.org/wiki/Sustainable_agriculture http://attra.ncat.org/
The fact is that the food we see is just a package for what we actually need (or desire) - tiny invisible nutrients, many of which we are yet to identify. One banana can be markedly different from another on many dimensions, but until recently we have only optimised for one dimension: price.
I highly recommend Michael Pollan's books, particularly the first third of The Omnivore's Dilemma, where he describes this process with respect to corn.