These regions tend to be divided into those that are highly dependent on farming as a source of livelihood and those where farming is a minor activity. The farming-dependent regions show a further dichotomy between poorly integrated regions where farming remains either a subsistence or semi-subsistence activity and regions where farming is highly specialised in the production of a major export crop that has little or no food potential, such as cotton, or is limited in its food value, such as coffee. Those that produce non-agricultural products rely on imported food, and access to food can be limited by transport restrictions, weak connectivity to external markets or by a decline in incomes if the resource price falls.