To design effective policies for rainforest conservation in shifting cultivation systems, it is crucial to have a better understanding of shifting cultivators’ decision making. This paper develops a unified dynamic farm model of shifting cultivation, addressing two lacunae in extant theoretical works: taking into account differences between primary and secondary forests and potential roles of on-farm soil conservation. The model unifies shifting cultivator’s decisions about primary-forest clearing, forest fallowing, and on-farm soil conservation by incorporating new soils acquired from cleared primary/secondary forest land into on-farm soil dynamics. I examine how three distinct policies—forest protection (e.g., protected areas), fallow management (e.g., improved fallow), and on-farm soil management (e.g., biochar in Amazonia )—alter primary-forest clearing (deforestation) and fallow length. The analysis reveals that although all three policies reduce deforestation, only on-farm soil management leads to longer fallow, i.e. , sustainable secondary fallow forest.
P. J. A. Kleinman, D. Pimentel and R. B. Bryant, “The Ecological Sustainability of Slash-and-Burn Agriculture,” Agriculture, Ecosystems and Environment, Vol. 52, No. 2-3, 1995, pp. 235-249. doi:10.1016/0167-8809(94)00531-I
H. Ruthenberg, “Farming Systems in the Tropics,” 3rd Edition, Clarendon Press, Oxford, 1980.
N. Myers, “The Primary Source: Tropical Forests and Our Future,” W. W. Norton, New York, 1992.
D. Lawrence, V. Suma and J. P. Mogea, “Changes in Species Composition with Repeated Shifting Cultivation: Limited Role of Soil Nutrients,” Ecological Applications, Vol. 15, No. 6, 2005, pp. 1953-1967. doi:10.1890/04-0841
R. L. Chazdon, C. A. Peres, D. Dent, D. Sheil, A. E. Lugo, D. Lamb, N. E. Stork and S. E. Miller, “The Potential for Species Conservation in Tropical Secondary Forests,” Conservation Biology, Vol. 23, No. 6, 2009, pp. 1406-1417. doi:10.1111/j.1523-1739.2009.01338.x
D. H. Dent and S. J. Wright, “The Future of Tropical Species in Secondary Forests: A Quantitative Review,” Biological Conservation, Vol. 142, No. 12, 2009, pp. 2833-2843. doi:10.1016/j.biocon.2009.05.035
Y. Takasaki, “Economic Models of Shifting Cultivation: A Review,” In: P. Moutinho, Ed., Deforestation around the World, InTech, Rijeka, 2012, pp. 351-372. doi:10.5772/35745
J. Smith, P. van de Kop, K. Reategui, I. Lombardi, C. Sabogal and A. Diaz, “Dynamics of Secondary Forests in Slash-And-Burn Farming: Interactions among Land Use Types in the Peruvian Amazon,” Agriculture Ecosystems & Environment, Vol. 76, No. 2-3, 1999, pp. 85-98. doi:10.1016/S0167-8809(99)00075-4
L. H. Pendleton and E. L. Howe, “Market Integration, Development, and Smallholder Forest Clearance,” Land Economics, Vol. 78, No. 1, 2002, pp. 1-19. doi:10.2307/3146919
O. T. Coomes, F. Grimard and G. J. Burt, “Tropical Forests and Shifting Cultivation: Secondary Forest Fallow Dynamics among Traditional Farmers of the Peruvian Amazon,” Ecological Economics, Vol. 32, No. 1, 2000, pp. 109-124. doi:10.1016/S0921-8009(99)00066-X
O. T. Coomes, Y. Takasaki and J. Rhemtulla, “Land-Use Poverty Traps Identified in Shifting Cultivation Systems Shape Long-Term Tropical Forest Cover,” Proceedings of the National Academy of Sciences of the United States of America, Vol. 108, No. 34, 2011, pp. 13925-13930. doi:10.1073/pnas.1012973108
S. Brown and A. E. Lugo, “Tropical Secondary Forests,” Journal of Tropical Ecology, Vol. 6, No. 1, 1990, pp. 1-32. doi:10.1017/S0266467400003989
S. P. Dalle and S. de Bois, “Shorter Fallow Cycles Affect the Availability of Noncrop Plant Resources in a Shifting Cultivation System,” Ecology and Society, Vol. 11, No. 2, 2006, p. 2.
E. B. Barbier, “The Economic Determinants of Land Degradation in Developing Countries,” Philosophical Transactions of the Royal Society of London: Series B, Vol. 352, No. 1356, 1997, pp. 891-899.
R. Lal, “Sustainable Management of Soil Resources in the Humid Tropics,” United Nations University Press, Tokyo, 1995.
B. Glaser, “Ameliorating Physical and Chemical Properties of Highly Weathered Soils in the Tropics with Charcoal—Review,” Biology and Fertility of Soils, Vol. 354, No. 4, 2002, pp. 219-230. doi:10.1007/s00374-002-0466-4
B. Glaser, “Prehistorically Modified Soils of Central Amazonia: A Model for Sustainable Agriculture in the Twenty-First Century,” Philosophical Transactions of the Royal Society B, Vol. 362, No. 1478, 2007, pp. 187-196. doi:10.1098/rstb.2006.1978
E. Marris, “Putting the Carbon Back: Black is the New Green,” Nature, Vol. 442, No. 7103, 2006, pp. 624-626. doi:10.1038/442624a
C. Steiner, W. G. Teixeira and W. Zech, “Slash and Char: An Alternative to Slash and Burn Practiced in the Amazon Basin,” In: J. Lehman, D. C. Kern, B. Glaser and J. Woods, Eds., Amazonian Dark Earths: Origins, Properties, and Management, Kluwer Academic Publishers, Dordrecht, 2004, pp. 125-139.
P. A. Sanchez, “Science in Agroforestry,” Agroforestry Systems, Vol. 30, No. 1-2, 1995, pp. 5-55. doi:10.1007/BF00708912
P. A. Sanchez, “Improved Fallows Come of Age in the Tropics,” Agroforestry Systems, Vol. 47, No. 1-3, 1999, pp. 3-12. doi:10.1023/A:1006287702265
A. Young, “Agroforestry for Soil Management,” CAB International and ICRAF, New York, 1997.
H. Brookfield and C. Padoch, “Appreciating Agrodiversity: A Look at the Dynamism and Diversity of Indigenous Farming Practices,” Environment, Vol. 36, No. 5, 1994, pp. 6-11, 37-45. doi:10.1080/00139157.1994.9929164
W. M. Denevan and C. Padoch, “Swidden-Fallow Agroforestry in the Peruvian Amazon,” The New York Botanical Garden, Bronx, 1987.
J. D. Unruh, “Ecological Aspects of Site Recovery under Swidden-Fallow Management in the Peruvian Amazon,” Agroforestry Systems, Vol. 7, No. 2, 1988, pp. 161-184. doi:10.1007/BF00046850
R. D. C. G. Mesquita, “Management of Advanced Regeneration in Secondary Forests of the Brazilian Amazon,” Forest Ecology and Management, Vol. 130, No. 1-3, 2000, pp. 131-140. doi:10.1016/S0378-1127(99)00174-7
Y. Takasaki, “A Model of Shifting Cultivation: Can Soil Conservation Reduce Deforestation?” Agricultural Economics, Vol. 35, No. 2, 2006, pp. 193-201. doi:10.1111/j.1574-0862.2006.00152.x
Y. Takasaki, O. T. Coomes, C. Abizaid and S. Brisson, “An Efficient Nonmarket Institution under Imperfect Markets: Labor Sharing for Tropical Forest Clearing,” American Journal of Agricultural Economics, in Press.
S. N. Swami, C. Steiner, W. G. Teixeira and J. Lehmann, “Charcoal Making in the Brazilian Amazon: Economic Aspects of Production and Carbon Conversion Efficiencies of Kilns,” In: W. I. Woods, Ed., Amazonian Dark Earths: Wim Sombroek’s Vision, Springer, Heidelberg, 2009, pp. 411-422. doi:10.1007/978-1-4020-9031-8_23
A. Angelsen, “Moving Ahead with REDD: Issues, Options and Implications,” Center for International Forestry Research, Bogor, 2008.
Millennium Ecosystem Assessment, “Ecosystems and Human Well-Being: Policy Response,” Island Press, Washington, D.C., 2005.
K. Andam, P. J. Ferraro, A. Pfaff, A. Sanchez-Azofeifa and J. Robalino, “Measuring the Effectiveness of Protected Area Networks in Reducing Deforestation,” Proceedings of the National Academy of Sciences of the United States of America, Vol. 105, No. 42, 2008, pp. 16089-16094. doi:10.1073/pnas.0800437105
L. Naughton-Treves, M. B. Holland and K. Brandon, “The Role of Protected Areas in Conserving Biodiversity and Sustaining Local Livelihoods,” Annual Review of Environment and Resource Economics, Vol. 30, No. 1, 2005, pp. 219-252. doi:10.1146/annurev.energy.30.050504.164507
P. J. C. Olivera, G. P. Asner, D. E. Knapp, A. Almeyda, R. Galván-Gildemeister, S. Keene, R. F. Raybin and R. C. Smith, “Land-Use Allocation Protects the Peruvian Amazon,” Science, Vol. 317, No. 5842, 2007, pp. 1233-1236. doi:10.1126/science.1146324
A. G. Bruner, R. E. Gullison, R. R. E. and G. A. B. Da Fonseca, “Effectiveness of Parks in Protecting Tropical Biodiversity,” Science, Vol. 291, No. 5501, 2001, pp. 125-128. doi:10.1126/science.291.5501.125
T. Tachibana, T. M. Nguyen and K. Otsuka, “Agricultural Intensification versus Extensification: A Case Study of Deforestation in the Northern-Hill Region of Vietnam,” Journal of Environmental Economics and Management, Vol. 41, No. 1, 2001, pp. 44-69. doi:10.1006/jeem.1998.1131
F. N. Scatena, R. T. Walker, A. K. O. Homma, A. de Conto, C. A. P. Ferreira, R. D. A. Carvalho, A. C. P. N. de Rocha, A. I. M. dos Santos and P. M. de Oliverira, “Cropping and Fallowing Sequences of Small Farmers in the ‘Terra Firme’ Landscape of the Brazilian Amazon: A Case Study from Santarem, Para,” Ecological Economics, Vol. 18, No. 1, 1996, pp. 29-40. doi:10.1016/0921-8009(95)00055-0
K. A. Dvoràk, “Resource Management by West African Farmers and the Economics of Shifting Cultivation,” American Journal of Agricultural Economics, Vol. 74, No. 3, 1992, pp. 809-815. doi:10.2307/1242600
B. A. Larson and D. W. Bromley, “Property Rights, Externalities, and Resource Degradation,” Journal of Development Economics, Vol. 33, No. 2, 1990, pp. 235-262. doi:10.1016/0304-3878(90)90023-5
E. H. Bulte and D. P. van Soest, “A Note on Soil Depth, Failing Markets and Agricultural Pricing,” Journal of Development Economics, Vol. 58, No. 1, 1999, pp. 245-254. doi:10.1016/S0304-3878(98)00111-4
E. H. Bulte and D. P. van Soest, “Environmental Degradation in Developing Countries: Households and the (Reverse) Environmental Kuznets Curve,” Journal of Development Economics, Vol. 65, No. 1, 2001, pp. 225-235. doi:10.1016/S0304-3878(01)00135-3
D. Kaimowitz and A. Angelsen, “Economic Models of Tropical Deforestation: A Review,” Center for International Forestry Research, Bogor, 1998.
E. B. Barbier and J. C. Burgess, “The Economics of Tropical Deforestation,” Journal of Economic Surveys, Vol. 15, No. 3, 2001, pp. 413-433. doi:10.1111/1467-6419.00144
F. Place and K. Otsuka, “Population, Tenure, and Natural Resource Management: The Case of Customary Land Area in Malawi,” Journal of Environmental Economics and Management, Vol. 41, No. 1, 2001, pp. 13-32. doi:10.1006/jeem.2000.1134
K. Otsuka and F. Place, “Land Tenure and Natural Resource Management,” The Johns Hopkins University Press, Baltimore and London, 2001.
L. J. Alston, G. D. Libecap and B. Mueller, “Land Reform Policies, the Sources of Violent Conflict, and Implications for Deforestation in the Brazilian Amazon,” Journal of Environmental Economics and Management, Vol. 39, No. 2, 2000, pp. 162-188. doi:10.1006/jeem.1999.1103
T. L. Anderson and P. J. Hill, “The Race for Property Rights,” Journal of Law and Economics, Vol. 33, No. 1, 1990, pp. 177-197. doi:10.1086/467203
L. Hotte, “Conflicts over Property Rights and Natural-Resource Exploitation at the Frontier,” Journal of Development Economics, Vol. 66, No. 1, 2001, pp. 1-21. doi:10.1016/S0304-3878(01)00153-5
B. Mueller, “Property Rights and the Evolution of a Frontier,” Land Economics, Vol. 73, No. 1, 1997, pp. 42-57. doi:10.2307/3147076
D. Benjamin, “Household Composition, Labor Markets and Labor Demand: Testing for Separation in Agricultural Household Models,” Econometrica, Vol. 60, No. 2, 1992, pp. 287-322. doi:10.2307/2951598
I. Singh, L. Squire and J. Strauss, “Agricultural Household Models: Extensions, Applications, and Policy,” The John Hopkins University Press, Baltimore, 1986.
Y. Takasaki, “Dynamic Household Models of Forest Clearing under Distinct Land and Labor Market Institutions: Can Agricultural Policies Reduce Tropical Deforestation?” Environment and Development Economics, Vol. 12, No. 3, 2007, pp. 423-443. doi:10.1017/S1355770X07003567
D. P. van Soest, E. H. Bulte, A. Angelsen and G. C. van Kooten, “Technological Change and Tropical Deforestation: A Perspective at the Household Level,” Environment and Development Economics, Vol. 7, No. 2, 2002, pp. 269-280.
A. Seietstad and K. Sydsaeter, “Optimal Control Theory with Economic Applications,” Elsevier, Amsterdam, 1987.
H. Klemick, “Shifting Cultivation, Forest Fallow, and Externalities in Ecosystem Services: Evidence from the Eastern Amazon,” Journal of Environmental Economics and Management, Vol. 61, No. 1, 2011, pp. 95-106. doi:10.1016/j.jeem.2010.07.003
R. López, “Environmental Externalities in Traditional Agriculture and the Impact of Trade Liberalization: The Case of Ghana,” Journal of Development Economics, Vol. 53, No. 1, 1997, pp. 17-39. doi:10.1016/S0304-3878(97)00015-1
U. Pascual, “Land Use Intensification Potential in Slash-nd-Burn Farming through Improvements in Technical Efficiency,” Ecological Economics, Vol. 52, No. 4, 2005, pp. 497-511.