Among the large number of crops of economic significance, rice is the most important which is widely grown in all regions and covers about half of the country's cultivated area. Other major field crops are cassava, corn, sugar cane, oil crops and perennial trees such as para rubber, fruit trees cover the rest of the area. The utilization of farm land is as follows: 51 percent for paddy, 24 percent under field crops, 17 percent under fruit trees and other tree crops and others occupy 8 percent. The major planted areas of selected crops are rice, maize, cassava and rubber.