Primitive Subsistence Farming: It is still practised in a few parts of India on small patches of land with the help of primitive tools like hoe, dao and digging sticks. It depends upon monsoon, natural fertility of the soil and suitability of other environmental conditions to the crops grown. It is also known as 'Slash and Burn' agriculture. In this type of farming, farmers clear a patch of land and produce cereals and other food crops to sustain their family and when the soil fertility decreases, the farmers shift and clear a fresh patch of land for cultivation. It helps in allowing nature to reload 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.