Sweden is almost self-sufficient in many agricultural products, although the sector employs no more than 2 percent of the labor force and contributes 2 percent of GDP. About 7 percent of Sweden's land is cultivated, mostly in the southern plains. Modern farming, including fertilization and mechanization, make high yields possible although soils are generally poor and the cold climate renders the growing season much shorter than elsewhere in Europe. Farms vary in size from large to small ones, many of which combine into various larger units and cooperatives. Traditionally important sectors such as dairies have declined in the 1990s compared to grain and vegetable production, but livestock and animal products remain among the main commodity items. Other crops include wheat, barley, oats, rye, potatoes, and sugar beets. In 1997, livestock included 1.8 million cattle, 2.4 million pigs, 470,000 sheep, and 11.2 million poultry. The country also exports some fur pelts, notably mink.