抄録
The main purpose of this paper is to clarify the similarities and differences in agricultural practices among the Iban people who live in geographically adjacent areas but different countries, Malaysia and Indonesia. The research areas are Lubok Antu in Sarawak, Malaysia and Lanjak in West Kalimantan, Indonesia. As the Iban people in these areas are of the same ethnicity, their traditional ways of shifting cultivation have been similar. However, at present, the two areas differ considerably in farming area, rice yield and application of fertilizers and agrochemicals. This may be partly due to intensification of agricultural practices and the resulting decline in soil fertility, but is largely due to economic disparities between the two areas. The effects of economic and political factors are analyzed and insights gained by the investigation of additional agricultural and economic activities such as cash crop production, wage-earning jobs and family expenditures in the research areas.