Lombardy has Alpine peaks and glaciers in the north, several picturesque lakes, and upland pastures that slope to the rich, irrigated Po valley in the south. The Valtellina valley is in the northeast. Rice, cereals, forage, flax, and sugar beets are the main crops of Lombardy, and the mulberry is extensively cultivated for use in sericulture. Milan is the chief commercial, industrial, and financial center in Italy, and Lombardy is the country's leading industrial region. Manufactures include textiles, clothing, iron and steel, machinery, motor vehicles, chemicals, furniture, and wine. There are universities at Milan and Pavia.