Greece's main road arteries gradually opened on Saturday, after farmers decided to abandon the roadblocks where they had been protesting against tax and pension overhaul for over a month.

"We are disappointed by the results of the meetings with the prime minister but we leave with our heads held high," Nikos Volkos, the head of a roadblock on the Egnatia Highway in northern Greece told Athens News Agency adding though that the farmers "will remain alert."

Greek Prime Minister Alexis Tsipras on Monday announced a string of measures to support the agricultural sector in a bid to win the farmers over.

But he ruled out yielding to their main demand of axing a pension reforms bill and tax changes requested by Greece's creditors in exchange for a third international bailout.

"The country's recovery must take your position into account, but you must take into account the budgetary requirements," Tsipras told the farmers' representatives.

His spokeswoman Olga Gerovassili said Tsipras proposed staggering planned raises in pension contributions until 2021 as well as measures to protect those on the lowest incomes, and commercial and administrative support for the agricultural sector.

He also announced the launch of a campaign to "limit abuses by middlemen and cartels" in food distribution.