The opportunity cost approach. In two approaches for estimating the on-site costs of soil erosion in the Philippines. Improving smallholder farming systems in Imperata areas of Southeast Asia

Rañola, R.F., Predo, C. 1997. The opportunity cost approach. In two approaches for estimating the on-site costs of soil erosion in the Philippines. Improving smallholder farming systems in Imperata areas of Southeast Asia . Imperata Project Paper No.1997/8. Canberra, Australia, Centre for Resource and Environmental Studies, Australian National University.