The article discusses the two traditions of swidden cultivation that existed in Norway from the 17th century AD and over the next 150-200 years. The Forest Finns migrated to Norway from Finland via Sweden in the 17th century. They grew rye, using a slash-and-burn technique, in old spruce forest. The swiddens were tilled for a couple of years, used as pasture, and left over to the forest again. The slash-and-burn technique they used was called «huuhta», and involved the burning of mature spruce forest to allow the cultivation of rye and turnips. They also had swiddens in mixed forest and in deciduous forest. There was also a tradition of slash-and-burn farming in Norway before the Forest Finns arrived. Several 17th and 18th century written sources describe this in a Norwegian context. The swiddens were found in mixed forest or deciduous forest, and were a supplement to the farming of the permanent fields. The two traditions differ in various respects. The Forest Finns had slash-and-burn farming as their main farming practice, while the Norwegians only used it as a supplement. The Forest Finns grew a type of rye which gave rich harvests in spruce forest, while the Norwegians farmed in mixed forest or deciduous forest.