What if I don't even know where to start?? 
These guides to pricing and statistics information and sources should help.

These pages should help.  By far, the largest most comprehensive and most reliable producer of statistics come from government agencies.  For agriculture, the USDA is the best place to start - you'll find a breakdown of their major publications in the following tabs.  We also link you to relevant non-government sources.

Data can be available either online or in print (or both).  Most recent data is likely online, though some publications still offer print.  Historical data will almost always be in print, with a few exceptions.  We've separated the tabs by National, International, and Historical, but browse through all three - data sources can overlap.

The lists here are extensive, but by no means comprehensive.  Try a catlog search for the specific data you need.  If you're in need of further assistance, come visit us at the Funk ACES Library Reference Desk - we'd be happy to help.

These are the two major publications for agricultural census data: the FAO for global (data in the publications is arranged by participating country), and the USDA for national.  The two publications listed here are the most current.