Multiple equilibria, soil conservation investments, and the resilience of agricultural systems
AbstractThis paper provides a new explanation for the persistent land degradation in some parts of the world, despite the availability of seemingly effective soil conservation technologies. We demonstrate that soil conservation technologies may induce agricultural systems to exhibit equilibria characterized by both low and high levels of soil degradation. These two equilibria are separated by a threshold level of soil degradation beyond which a conservation investment will not yield a positive return. Once a parcel of land crosses this productivity threshold, soil degradation becomes economically irreversible (it is not profitable to invest in soil conservation) even though the degradation may be technically reversible. A case study of terracing investments in Peru is used to demonstrate the existence of multiple equilibria under conditions typical of many marginal agricultural areas. These findings help explain why attempts to encourage permanent adoption of soil conservation practices often fail, and how more successful policies could be designed.
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Bibliographic InfoArticle provided by Cambridge University Press in its journal Environment and Development Economics.
Volume (Year): 11 (2006)
Issue (Month): 04 (August)
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- Blazy, Jean-Marc & Ozier-Lafontaine, Harry & Doré, Thierry & Thomas, Alban & Wery, Jacques, 2009. "A methodological framework that accounts for farm diversity in the prototyping of crop management systems. Application to banana-based systems in Guadeloupe," Agricultural Systems, Elsevier, vol. 101(1-2), pages 30-41, June.
- Jules R Siedenburg, . "Local Knowledge and Natural Resource Management in a Peasant Farming Community Facing Rapid Change: A Critical Examination," QEH Working Papers qehwps166, Queen Elizabeth House, University of Oxford.
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