This is not an exhaustive list of statistics on Agriculture, but will provide a starting point.

The references below are available either online or in print form.
Click on the [print] link to view the Library Catalogue and [online] to view the resource online.

Australia - General

Australian Bureau of Statistics (ABS) [online]
Year book Australia [print and online]

Agriculture - Australia

Australian Bureau of Resource Economics (ABARE) [online]

Australian Bureau of Statistics - Agriculture related statistics
Agricultural financial statistics and value of products [online]
Agriculture [online]

Australian Government Agriculture Portal
Partners [online] Links to Australian Government Industry Organisations many of which contain statistical data.

Dairy
Dairy Australia [online]

Forestry
LFR Creswick Forestry Statistics

Horticulture
Australian and New Zealand Wine Industry Directory [print]
Australian Horticulture Statistics Handbook [online]
Winefacts [online] Australian Wine and Brandy Corporation, fee and free statistical information
WineBiz [online] click on Industry Statistics for Viticulture stats, wine exports, and world wine statistics and more

Livestock
Meat and Livestock Australia market reports [online]

Pigs/Pork
Australian Pork Limited - Market Reporting [online] Australian Pig Annual

International Agriculture

European Union Agriculture Statistics [online]
FAOSTAT - Agriculture [online] Food and Agriculture Organization of the United Nations
International Organisation of Vine and Wine [online] click on the Statistics tab
OECD-FAO Agricultural outlook : 2008-2017. [online] or online at Source OECD
World Trade Organisation [online]