Land use refers to the way a piece of land is used in the area. The relief of the land determines the type of activity that takes place on the land. In highlands, such as hills, mountains and plateaus, where the slope of the land is generally steep, the land is used for grazing sheep and goats. Most of the land is covered by forests which facilitates economic activities such as forest harvesting and lumbering. Terrace farming is also undertaken on hilly slopes to grow crop such as rice, barley and tea. Various agricultural activities take place on lowlands since cultivation of crops is easier on a flat surface than on a sloping surface.