1) Ahmad, R. (2009). Analysis of factors affecting adoption of sustainable soil conservation practices among wheat growers. World Applied Sciences Journal, 6(5):644-651. 2) Environmental Protection Authority. (2002). Third National Report to the Committee for the Review of the United Nations Convention to Combat Desertification, EPA, Accra.
3) FAO. (2000). Food and Agricultural Organization of the United Nations. http://www.fao.org/livestock/agap/frg/oldafris/data/314.htm. Accessed on 28/03/10. 4) Bai, Z. G., et al (2008). Global assessment of land degradation and improvement: 1. identification by remote sensing. Report 2008/01. Wageningen, Netherlands: ISRIC—World Soil Information, Food and Agriculture Organization of the United Nations. 5) Stonehouse, P. D. (1991). The economics of tillage for large- scale mechanized farms. Soil and Tillage Resource, 20 (2):333-352. 6) World Bank (2006). Natural Resources Management and the Sustainability of Economic Growth. Economic and Sector Work, Washington D.C. World Bank. 7) World Bank, DFID, ISSER. (2005). Economic and Sector Work, Ghana. Natural Resource Management and Growth Sustainability.