Five members of the Irish Farmers Association (IFA) grain committee occupied the department offices over the previous night.
Grain farmers from other parts of the country yesterday supported the protest outside Agriculture House in Kildare St where bales of straw were also delivered.
The IFA is seeking details of a support package for tillage farmers who lost crops in the 2016 harvest due to dire weather conditions.
It wants a meeting with Agriculture Minister Michael Creed to discuss the scheme, which has been reported in the media.
IFA president Joe Healy told RTÉ’s Morning Ireland the protesters will stay in place for as “long as is required”.
Grain committee chairman Liam Dunne said members were very concerned about the selective information that appeared in the media.
The scheme appears to be too narrow and restrictive, he said, adding that the reported budget may not be sufficient to cover the full extent of the losses incurred by farmers.