1. http://commodities.about.com/od/tradingstrategies/a/commodity_trade.htm

Here are some useful information on how to trade

Fundamental Anlysis—Supply and Demand

Supply–The supply of a commodity is the amount that is carried over from previous year of production and the amount that is being produced during the current year.There are many factors that can impact the supply of commodities like weather, amount of acres planted, production strikes, crop diseases and technology.

Demand–Demand for commodities is the amount that is consumed at a given price level.

There are numerous reports that are compiled by government sources – USDA, Department of Energy and the Futures Exchanges can be used as a source to carry out fundamental analysis.

2. http://www.uswheat.org/reports/harvest

U.S. Wheat Associates reports on the condition of America’s wheat crop every Friday through the harvest season (June – October). The reports includes updates for Hard Red Winter, Soft Red Winter, Hard Red Spring, White, and Durum.

3. http://www.spectrumcommodities.com/education/calendar/index.html

If you want to check the basic information on crops such as different crops harvest seasons on different regions, production and consumption, the largest exporters and importers and so on. Charts on this website represent production stages for different crops around the globe and you can check any month you want.