The continental plains and valleys are primarily utilized for agriculture, such as growing cereals and vegetables. Closer to the sea, red lands are used for cultivation of grapes, vine, olives, and figs. Agriculture and the production of ecological food, the olive gardens, and the production of quality wines is the focus of Istria's agriculture sector. The coastline and nearby islands are rich in the maquis shrubland (mostly holm oak and strawberry tree). Woods, mostly oak and pine trees, cover a third of the territory.