What is 'slash and burn' agriculture ? Explain its salient features

‘Slash and burn’ agriculture is the other name for shifting Agriculture. It is the most primitive farming type practised by the tribal people living in tropical regions.
Salient features of this agriculture are :
(i) Forests are cleared and trees are burnt to make the land available for cultivation.
(ii) Digging stick is mainly used for cultivation.
(iii) Mainly root crops and food crops are grown for their own use.
(iv) After 2 years when the soil becomes impoverished they move to another forest area.
(v) Productivity is very low as there is less use of natural fertilisers and pesticides, etc.