Most farmers in developing countries rely on SMS as their primary means of accessing information and communication technology due to limited infrastructure and education in rural areas. The document discusses using SMS systems to provide farmers with access to international market prices, expert agricultural advice, weather forecasts, and other useful phone numbers. It notes some existing agricultural SMS information systems but says they can be difficult to maintain at scale. The document advocates for a more social, crowd-sourced approach to ensure information remains relevant to smallholders' niche needs.