A technical and economic evaluation has been made of the possibility of producing gas from agricultural residues on typical farms in western and eastern Canada. A preliminary assessment shows that, as far as the western farm is concerned, the cost of collecting the required residues would be prohibitive in view of the enormous areas involved; in the east, on the other hand, where heating represents a far greater proportion of a farmer's expenses, collection and conversion of the residues to thermal energy would be a relatively minor expense. The study points out the advantages of extracting energy from corncobs for heating greenhouses and drying grain