The following links will take you to the statistics pages of the relevant subject libguides.
OECD statistical data on agricultural and food topics is available through the library's subscription to OECD iLibrary (formerly SourceOECD).
Select BOOKS, then Theme: Agriculture and Food for statistical publications including:
FAO (Food & Agriculture Organization of the United Nations) is the lead agency for agriculture, forestry, fisheries and rural development. Statistical data is freely available via its statistical databases and the Corporate Document Repository site.
In addition, FAO's annual publication State of Food and Agriculture (SOFA) examines key developments in food and agriculture, and has a useful statistical annexe.