Its economy is based in agriculture, in which rural population produces agricultural commodities for export to larger markets in Praia, Assomada and Fogo. Small market centers exist in São Lourenço dos Órgãos and Pedra Badejo, which act primary as commodity exchanges where subsistence farmers exchange goods as available with merchants who transport and sell goods in larger markets. The primary agricultural productions include fodder (usually in the form of maize stalks), bananas, papayas and coconuts. Prior to 1981 the area also produced a substantial percentage of the island's maize, but the arrival of large-scale international food aid, while vastly improving the region’s food security, made producing foodstuffs unprofitable. Maize and legumes are still the region's primary agricultural product, though 97% is consumed by the families that produce it. The mixture of nitrogen fixing and nitrogen consuming crops reduces the need for chemical fertilizers, allowing small farmers to remain solvent despite little cash income.