 Forested, mountainous terrain covers 70 percent of the nation, yielding a variety of wild edible greens that are also grown in dry-field farms.Korea’s major rivers, including the Nakdong River, the Han River and the Geum River, tend to flow westward along the mountain ranges, creating well-developed plains in the peninsula’s western region.The conditions in the western and southern regions of the peninsula are therefore favorable to rice farms, while dry-field farms predominate in the northern and eastern regions.