Nationals leader Barnaby Joyce, Labor's Joel Fitzgibbon and Greens leader Richard Di Natale have faced off in a regional leaders' debate, with live exports, foreign farm ownership and the dairy crisis on the agenda.

The event saw Mr Joyce link the 2011 live export ban to an increase in asylum seeker boats from Indonesia, while Senator Di Natale indicated he would back a floor price for milk.

The debate, in Goulburn in New South Wales, capped a day in which the Government faced questions over its claims of a "black hole" in Labor's spending plans.

Look back on how the debate, and the day in politics, unfolded.