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CABI Book Chapter

Land use change in tropical watersheds: evidence, causes and remedies.

Book cover for Land use change in tropical watersheds: evidence, causes and remedies.

Description

This book studies land use change in tropical landscapes, with particular emphasis on the economic processes that influence rates of land degradation and forest clearing. Multidisciplinary contributions draw lessons from data collected between 1992 and 2004 in the Manupali watershed in southern Philippines. Through this detailed case study, the book documents forces leading to land use changes, in...

Metrics

Chapter 6 (Page no: 90)

Economic incentives and agricultural outcomes in upland settings.

This chapter presents a framework for measuring the changes in economic and environmental outcomes that occur in watersheds subject to land degradation, both in partial and in general equilibrium. This framework is used to calculate changes in upland land degradation due to changes in economic conditions. The chapter presents and discusses simulation results for an applied general equilibrium experiment that examines the likely economic and soil erosion implications of technical progress in maize production in the Philippines, The value of changes in soil degradation resulting from exogenous changes occurring both within upland agriculture and in other sectors of the economy, is estimated. To do this, nutrient replacement cost estimates are combined with data on annual soil erosion rates for different upland crops in the Philippines. This information, together with data on upland crop area, is used to calculate the aggregate value of changes in land degradation due to changes in production technologies and land area planted to upland crops. The results of this work indicate that not all forms of agricultural growth necessarily increase land degradation. In the Philippines, investment in technical progress in maize (a relatively erosive crop characterized by inelastic demand) results in reduced maize area and thus less degradation, so long as the gains from productivity growth result in lower producer prices.

Other chapters from this book

Chapter: 1 (Page no: 1) Economic development and watershed degradation. Author(s): Coxhead, I. Shively, G.
Chapter: 2 (Page no: 19) Agricultural development and institutional transitions. Author(s): Rola, A. C. Coxhead, I.
Chapter: 3 (Page no: 37) Water quality changes in the Manupali River Watershed: evidence from a community-based water monitoring project. Author(s): Deutsch, W. G. Orprecio, J. L.
Chapter: 4 (Page no: 58) How do national markets and price policies affect land use at the forest margin? Evidence from the Philippines. Author(s): Coxhead, I. Rola, A. C. Kim, K.
Chapter: 5 (Page no: 78) How do relative price changes alter land use decisions? Panel data evidence from the Manupali watershed, Philippines. Author(s): Coxhead, I. Demeke, B.
Chapter: 7 (Page no: 109) Simulating soil erosion and sediment yield in small upland watersheds using the WEPP model. Author(s): Ella, V. B.
Chapter: 8 (Page no: 126) Identifying soil erosion hotspots in the Manupali River Watershed. Author(s): Paningbatan, E. P., Jr.
Chapter: 9 (Page no: 133) Alternatives to traditional annual crop agriculture in the uplands - biophysical evidence from the Manupali River Watershed. Author(s): Midmore, D. J. Poudel, D. D. Nissen, T. M. DaƱo, A. Zhu, G.
Chapter: 10 (Page no: 147) Linking economic policies and environmental outcomes at a watershed scale. Author(s): Shively, G. Zelek, C.
Chapter: 11 (Page no: 163) Using payments for environmental services (PES) to assist in watershed management. Author(s): Pagiola, S. Angeles, M. delos Shively, G.
Chapter: 12 (Page no: 176) Conclusions and some directions for future research. Author(s): Coxhead, I. Rola, A. C. Shively, G.

Chapter details

  • Author Affiliation
  • Department of Agricultural and Applied Economics, University of Wisconsin-Madison, 427 Lorch Street, Madison, WI 53706, USA.
  • Year of Publication
  • 2005
  • ISBN
  • 9780851999128
  • Record Number
  • 20063019187