a plot of land is cleared in shifting cultivation by felling trees and burning them. The ashes are then mixed with the soil and crops like maize, yam, potatoes and cassava are grown. Shifting cultivation is practiced in the Thickly forested areas of Amazon Basin, tropical Africa, parts of Southeast Asia and North East India. These are the areas of heavy rainfall and quick regeneration of vegetation. Shifting cultivation is also known as 'slash and Burn' agriculture.