Read the given source and answer the questions that follow: Primitive Subsistence Farming It is a 'slash and burn' agriculture. Farmers clear a patch…

Read the given source and answer the questions that follow : Primitive Subsistence Farming It is a 'slash and burn' agriculture. Farmers clear a patch of land and produce cereals and other food crops to sustain their family. When the soil fertility decreases, the farmers shift and clear a fresh patch of land for cultivation. This type of shifting allows Nature to replenish the fertility of the soil through natural processes; land productivity in this type of agriculture is low as the farmer does not use fertilisers or other modern inputs. It is known by different names in different parts of the country. It is jhumming in north-eastern states like Assam, Meghalaya, Mizoram and Nagaland; Pamlou in Manipur, Dipa in Bastar district of Chhattisgarh, and in Andaman and Nicobar Islands. ($\displaystyle 35.1$) 'Slash and Burn' system of agriculture comes under which type of farming ? ($\displaystyle 35.2$) Why is productivity low in 'Slash and Burn' system ? ($\displaystyle 35.3$) Describe any two features of 'Slash and Burn' system of agriculture.