Estimating Returns to Soil and Water Conservation Investments - An Application to Crop Yield in Kenya
Productivity gains from soil and water conservation (SWC) have empirical support in research stations. Previous empirical results from on-farm adoption of SWC are, however, varied. This study investigated the impact of soil conservation investment on farm productivity in three regions in Kenya. Using plot-level survey data, we focused on land productivity on plots with and without SWC. We tested the overall soil conservation hypothesis that increased SWC is beneficial for yield, as well as more specific hypotheses that SWC affects levels of inputs, returns from these inputs, and crop characteristics. The results showed a mixed picture where plots without SWC generally have higher yield values per hectare. However, plots with SWC are significantly steeper and more eroded than plots without SWC. A more careful analysis of a two-stage random effects–switching regression estimation comparing three SWC technologies to plots without SWC indicated that SWC increased the returns from degraded plots and sometimes from other inputs. A simulation exercise based on these estimations also showed that, in most cases, adoption has been beneficial for those who have done it and would be beneficial for those who have not.
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| Length: | 36 pages |
| Date of creation: | 30 Nov 2009 |
| Handle: | RePEc:hhs:gunwpe:0402 |
| Contact details of provider: | Postal: Department of Economics, School of Business, Economics and Law, University of Gothenburg, Box 640, SE 405 30 GÖTEBORG, Sweden Phone: 031-773 10 00 Web page: http://www.handels.gu.se/econ/ More information through EDIRC
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References listed on IDEAS
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- Benjamin, Dwayne, 1995. "Can unobserved land quality explain the inverse productivity relationship?," Journal of Development Economics, Elsevier, vol. 46(1), pages 51-84, February.
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- Christopher B. Barrett & Christine M. Moser & Oloro V. McHugh & Joeli Barison, 2004.
"Better Technology, Better Plots, or Better Farmers? Identifying Changes in Productivity and Risk among Malagasy Rice Farmers,"
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- Barrett, Christopher B. & Moser, Christine M. & Barison, Joeli & McHugh, Oloro V., 2003. "Better Technology, Better Plots or Better Farmers? Identifying Changes In Productivity and Risk Among Malagasy Rice Farmers," Working Papers 127212, Cornell University, Department of Applied Economics and Management.
- Barrett, Christopher B. & Moser, Christine M., 2003. "Better Technology, Better Plots or Better Farmers? Identifying Changes in Productivity and Risk Among Malagasy Rice Farmers," 2003 Annual meeting, July 27-30, Montreal, Canada 22251, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
- Byiringiro, Fidele Usabuwera & Reardon, Thomas, 1996. "Farm productivity in Rwanda: effects of farm size, erosion, and soil conservation investments," Agricultural Economics of Agricultural Economists, International Association of Agricultural Economists, vol. 15(2), November.
- Byiringiro, Fidele & Reardon, Thomas, 1996. "Farm productivity in Rwanda: effects of farm size, erosion, and soil conservation investments," Agricultural Economics, Blackwell, vol. 15(2), pages 127-136, November.
- George E. Battese, 1997. "A Note On The Estimation Of Cobb-Douglas Production Functions When Some Explanatory Variables Have Zero Values," Journal of Agricultural Economics, Wiley Blackwell, vol. 48(1-3), pages 250-252. Full references (including those not matched with items on IDEAS)
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