efficiency: the case of smallholder rubber production in customary land areas of Suma-
tra. Agroforestry Systems52:145–160.
Tomich, T., M. van Noordwijk, S. Budidarsono, A. Gillison, T. Kusumanto, D. Murdi-
yarso, F. Stolle, and A. M. Fagi. 2001. Agricultural intensification, deforestation, and the
environment: assessing tradeoffs in Sumatra, Indonesia. Pages 221–244 in D. Lee and C.
Barrett (eds.), Tradeoffs or synergies? Agricultural intensification, economic development, and
the environment.Wallingford, UK: CAB International.
Wachter, D. 1992. Land titling for land conservation in developing countries.Divisional
Wo rking Paper, Environment Department. Washington, DC: World Bank.
Yanggen, D., and T. Reardon. 2001. Kudzu improved fallows in the Peruvian Amazon.
Pages 213–230 in A. Angelsen and D. Kaimowitz (eds.), Agricultural technologies and
tropical deforestation.Wallingford, UK: CAB International.
Yo ung, A. 1997. Agroforestry for soil management.2nd edition. Guildford & King’s Lynn,
Norwich, UK: Biddles Ltd.
106 II. The Ecological Economics of Agroforestry