Agriculture in the Bahamas is carried out on small plots throughout most of the islands. Only about 1% of the land area is cultivated. The nature of the terrain limits the scope of farming, which is mainly a household industry. The main crops are vegetables: onions, okra, and tomatoes, the last two raised mainly for export. Inadequate production has necessitated the import of some 80% of the islands’ food supply. Among steps the government has taken to expand and improve agriculture is the reserving of 450,000 acres (1,821 km2) exclusively for farming, 20,000 acres (81 km2) of which were converted to fruit farming. Export-oriented orange, grapefruit, and cucumber production occurs on Abaco. Agricultural products in 2004 included 55,500 tons of sugar cane, 13,000 tons of grapefruit, 8,700 tons of lemons and limes, 5,000 tons of tomatoes, and 880 tons of sweet potatoes.