TRIBES from west to east.Jhumming is PRACTICED by the majority of these GROUPS. It is also known as slash and burn or SHIFTING cultivation.Slash-and-burn agriculture: Method of cultivation in which forests are burned and cleared for planting.This area is rich in biodiversity, which the indigenous communities have protected. The Arunachal Himalayas:These stretch from the Bhutan Himalayas in the west to the Diphu pass in the east.Mountain peaks: Kangtu and Namcha BarwaFast-flowing rivers cut across these ranges from north to south, creating DEEP gorges.Rivers: Kameng, Subansiri, Dihang, Dibang and LohitThe inter-valley transportation links are minimal due to the rugged topography.