What is subsistence farming?
Farming that allows a family to basically survive or subsist on their own.
Much of the world's farming is subsistence farming in which people farm not for profit but as their main source of food. With subsistence farming, there is generally no surplus to sell. Subsistence farming is in contrast to commercial agriculture, where those farming the land are doing so not to feed their family or community but to sell in large quantities.
In subsistence farming, family plots tend to be fairly small and work is mostly done my manual labor, with little to no machinery.
Subsistence farming is common in parts of Africa, Asia, and South America.