Organic food and other crops (like cotton) is big business.
Some government prepackaged (but good) facts about organic production in us.
Do your own search for detailed percentages and totals for organic crops here (use keyword organic). note: right now I can find only data for all organic crops here (although it does break it down by county), but i will keep looking.
If you are looking for reports on organic food, Marketline Advantage industry reports are a good source.
You may have to search the internet for trade association publications, like this report on organic cotton.