1. http://futures.tradingcharts.com/chart/CN/M
this website can provide you with all data of future commodity and also the anlysis.
2. http://articles.latimes.com/2012/sep/28/business/la-fi-mo-corn-inventory-8-year-low-prices-jump-20120928
Los Angeles times. great reading materal. only for reference.
3. http://farmdocdaily.illinois.edu/2012/07/current_expectations_of_future.html
A very good webstie that prives agricultural information and analysis.