The main crops grown in Portugal are cereals (wheat, barley, corn and rice), potatoes, grapes (for wine), olives and tomatoes.
Portugal is one of the world's largest exporters of tomato paste and a leading exporter of wines. These overseas sales help offset the cost of imported wheat and meat.
More than one-third of Portugal is forested. Most of the mountainous areas are well suited to forestry and forest products, such as cork, resins and pine and eucalyptus timber. The market value of these natural products has increased and there is a growing demand for the industry.
Portugal's long coastline and the abundance of fish in the surrounding waters have favoured the development of the fishing industry. Sardines, anchovies and tuna caught near the coasts, together with other species such as codfish from the North Atlantic, largely contribute to food supplies. The fish industry has prospered and its products are exported all over the world.