The Ranau plain and its surrounding hilly areas were historically inhabited by Dusun farmers who practised shifting cultivation. Their major staple crops were upland rice and lowland wet rice. Natives from Ranau would go to large tamu (native market) at nearby districts to sell and buy, or exchange goods using the barter system. Tobacco, a major export item for the company, was successfully cultivated in extensive parts of Ranau district, especially in the highlands. It became an important source of income for Ranau natives. At that time, brokers thought that the tobacco produced from highland Ranau and the Interior proper was of high quality compared to that grown down in the lowlands, although the plants were similarly obtained from Ranau.
