Its common knowledge IMO, but you can certainly Google it. Agriculture is a near-perfect free market, so organizations and governments often destroy crops to raise prices.
How does government interference in a market make it near-perfectly free? The U.S. agriculture market is infamous as a source of government waste and pork barrel spending:
I don't think that's correct either. Many of the crops grown in the american west wouldn't be profitable if it weren't for huge subsidies. In the most egregious cases Californian farmers have grown thirsty, low value crops while their counterparts in the Southeast were being paid to destroy them.
http://www.economist.com/news/united-states/21643191-crop-pr...