The major crops are rice, corn (maize), sugarcane, and coconuts.
The selected system (D-trnL) demonstrated specificity toward olive in contrast to other oleaginous species (canola, soybean, sunflower, maize, peanut and coconut) and showed high sensitivity in a broad linear dynamic range (LOD and LOQ: 500 ng – 0.0625 pg).
In addition to rice, other food products include cassava, corn (maize), sugarcane, soybeans, and coconuts.
Economic changes occurred with the development of European plantations in the island group after 1867: cotton was the initial crop, followed by corn (maize), coffee, cocoa beans, and coconuts (for copra).
The state also produces cotton, corn (maize), peanuts (groundnuts), cassava, oranges, taro, and coconuts.
Because there are few rivers, there is a lack of freshwater, but the soil supports corn (maize), rice, coconut and sago palms, yams, plantains, mangoes, and papayas.
Teak is obtained from its forests, and its fertile plains produce rice, sugarcane, cotton, cassava, corn (maize), peanuts, coconuts, soybeans, and from estates coffee, cocoa, quinine, tobacco, and indigo.
Minor crops are corn (maize), coconuts, mangoes and other tropical fruits, sugarcane, and tobacco.
Agriculture is the principal occupation; crops include rice, corn (maize), fruits, vegetables, coconuts, and betel nuts.
