This presentation by Pham Thi Sen from NOMAFSI introduces Conservation Agriculture (CA) as an agroecological response to soil erosion, climate change, and unsustainable farming in Vietnam’s northern mountainous region. It highlights CA’s three core principles—minimal soil disturbance, permanent soil cover, and crop diversification—and reviews participatory efforts since 2009 to adapt and promote CA practices locally through research, outreach, and capacity building.