Search Food and Agriculture Organization of the United Nations Publications.

Also try AgEcon Search - Research in Agricultural and Applied Economics from the University of Minnesota.

Use EconLit to identify and locate relevant literature.

Check out resources provided by the National Agricultural Library, including:

• AGRICOLA - search citations from two agricultural science databases: indexed journal articles and the NAL catalog.
• PubAg - find full-text articles and citations to peer-reviewed journal articles in the agricultural sciences.
• Ag Data Commons - access open data relevant to agricultural research.

Use Bloomberg (see access details).

• Type BI AGRIG and hit the green <GO> key to access the Global Agriculture Industry Dashboard, which includes prices, futures, forwards, and top countries by crop production, imports, and exports. 
• Type COMM and hit the green <GO> key to open the Commodity Product Catalog. Under Product Class, expand Agriculture section, and make selections to view detailed forwards and futures.
• Type AGRI and hit the green <GO> key to access the Agriculture Economic Calendar.