Research on the organic food industry

I recently came across this page at the Agricultural Market Resource Center which has detailed information on the organic food trends. Here are a few of the articles I found interesting: Midwest Organics, Organic foods: Are they safer? More nutritious?, Organic food sales feel the bite from sluggish economy, and 35 Million Hectares of Organic Agricultural Land World-wide.

Are there any detailed market research websites you've found that you use for your industry? What are they? Do you find webpages like these useful?