Davis, Jason (2011). Swidden Agriculture.. Mulvaney, Dustin & Robbins, Paul (Eds.) (pp. 425-426). Thousand Oaks, Calif.: SAGE Publications.
Swidden agriculture—a more expansive form of slash-and-burn agriculture—is a type of shifting cultivation that entails the cutting and drying of all vegetation from a forest patch until fire can properly take hold. Following burning, the resultant ash provides the swidden farmer with a sufficient nutrient base from which to farm for up to four years. The burning process also removes potentially damaging pests from the plot. After the nutrients have been exhausted from the swidden plot, the farmer moves to an adjacent plot of forest land and repeats the entire process of cutting, drying, burning, planting, harvesting, and abandoning again.
The Sage Reference Series on Green Society: Toward a Sustainable Future