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Economic valuation of land restoration: The case of exclosures established on communal grazing lands in Tigray, Ethiopia

Authors

  • W. Mekuria,

    Corresponding author
    1. Soil Science of Tropical and Subtropical Ecosystems, Buesgen Institute, Georg-August University of Göttingen, Buesgenweg 2, 37077 Göttingen, Germany
    • Soil Science of Tropical and Subtropical Ecosystems, Buesgen Institute, Georg-August University of Gottingen, Buesgenweg 2, 37077 Goettingen, Germany.
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  • E. Veldkamp,

    1. Soil Science of Tropical and Subtropical Ecosystems, Buesgen Institute, Georg-August University of Göttingen, Buesgenweg 2, 37077 Göttingen, Germany
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  • M. Tilahun,

    1. Faculty of Bioscience Engineering, Department of Earth and Environmental Sciences, Division of Agricultural and Food Economics, Catholic University of Leuven, Celestijnenlaan 200E- bus 2411, 3001 Heverlee, Belgium
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  • R. Olschewski

    1. Swiss Federal Research Institute WSL, Zürcherstr. 111, CH-8903 Birmensdorf, Switzerland
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Abstract

Converting degraded grazing lands into exclosures is one option to restore soil nutrients and to sequester carbon from the atmosphere. We estimate the economic value of such a conversion and assess the perception of local communities concerning exclosures in the highlands of Tigray, Ethiopia. Our research combines a soil and vegetation study with a socio-economic survey, and a financial analysis. Over a period of 30 years, sequestered carbon dioxide was 246 Mg ha−1, total soil nitrogen increased by 7·9 Mg ha−1 and additional available phosphorous stocks amounted to 40 kg ha−1. The Net Present Value of exclosure's ecosystem services under consideration was about 28 per cent (837 US $) higher than alternative wheat production. Carbon revenues alone added up to only about 44 per cent of the net revenues of wheat production. This indicates that (i) carbon market revenues only, would not generate sufficient incentives to establish additional exclosures, and (ii) if all benefits are taken into account and financially rewarded, exclosures are competitive to alternatives land uses. We also identified substantial opportunities to mobilize the local communities in efforts to establish exclosures, given that more than 75 per cent had a positive view on exclosures effectiveness to restore degraded soils and vegetation. We conclude that a comprehensive analysis is necessary to consider the ecological as well as economic and social impacts of exclosures. Our findings are important information for local decision makers and may provide incentives for the establishment of further exclosures in the Northern Highlands of Ethiopia, thereby contributing to a sustainable local development process. Copyright © 2010 John Wiley & Sons, Ltd.

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