The Morrison government is facing a test of wills on two rural fronts as angry irrigators call to scrap the Murray Darling Basin Plan and the opposition and crossbench maintain pressure for major dairy industry reform.

About 2000 farmers and their supporters on Monday drove in a convoy from southern NSW and Victorian irrigation districts to Parliament House to demand an end to the basin plan, which they say has stripped their water rights.

"This rally will be known as the line in the sand," organiser Chris Brooks said. Credit:Alex Ellinghausen

Rally organiser and Barooga, NSW irrigator Chris Brooks channelled the anger of many when he said the mostly "conservative" members in the crowd viewed the basin plan as the "most despicable act by any government against Australians".

"This rally will be known as the line in the sand. No more! We are here to take those rights back," he said.