Agriculture in Portugal is based on small to medium-sized family-owned dispersed units. However, the sector also includes larger scale intensive farming export-oriented agrobusinesses backed by companies (like Grupo RAR's Vitacress, Sovena, Lactogal, Vale da Rosa, Companhia das Lezírias and Valouro). The country produces a wide variety of crops and livestock products, including tomatoes, citrus, green vegetables, rice, corn, barley, olives, oilseeds, nuts, cherries, bilberry, table grapes, edible mushrooms, dairy products, poultry and beef.

Upon what is Portuguese agriculture based?