Medvedev oversees four 'national projects' - aimed at producing affordable housing, a modern healthcare system, high-quality education and developing the agro-industrial sector - that are currently being implemented in Russia.
"We will do all we can to ensure that state support is sufficient for the development of our agriculture," he told reporters.
He said there could be no question about reducing investment in the agricultural sector, adding that Russia is "a major agrarian power," accounting for over 10% of the world's arable land reserves.
"These investments should grow," he said.
Medvedev, the man publicly-backed by Russian President Vladimir Putin to succeed him, earlier pledged to maintain current economic policies if elected president.
He said Russia needs decades of stable and sustained development, something that it lacked in the 20th century.
A one-month-long media campaign for Russia's presidential election kicked off on Saturday ahead of the March 2 poll.
Each of the four registered candidates will have free air time in the national media: First Deputy Prime Minister Dmitry Medvedev, Communist Party leader Gennady Zyuganov, Liberal Democratic Party leader Vladimir Zhirinovsky, and Democratic Party leader Andrei Bogdanov.
Half of the free air time has been allocated for debates.
Channel I, Rossia TV, and TV Center, as well as Mayak, Radio Russia and Voice of Russia will grant seven free hours for advertizing clips and TV debates each, although favorite Dmitry Medvedev has refused to take part in TV debates, saying he will continue his daily job.
