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Die Wirksamkeit von Boden

Die Wirksamkeit von Boden

References Scherr SJ

References Scherr SJ (1999) Soil degradation, a threat to developing-country food security by 2020? Food, agriculture and the environment discussion paper 27. International Food Policy Research Institute 2033 K Street, N.W. Washington DC 20006- 1002 USA, pp 13-45. Scherr SJ (2000) A downward spiral? Research evidence on the relationship between poverty and natural resource degradation. Food Policy, 25(4):479-498 SCRP (Soil Conservation Research Programme) (2000) Area of Maybar, Wello Ethiopia, long term monitoring of the agricultural environment (1981-1994). Soil erosion and conservation data base. Switzerland, pp 2-36 Shiferaw B, Holden ST (1999) Soil erosion and smallholders' conservation decisions in the highlands of Ethiopia. World Development, 27(4):739-752 Shiferaw B, Holden ST (1998) Resource degradation and adoption of land conservation technologies in the Ethiopian highlands: A case study in Andit Tid, North Shewa. Agricultural Economics, 18(3):233-247 Sonneveld BGJS, Keyzer MA (2003) Land under pressure: Soil conservation concerns and opportunities for Ethiopia. Land Degradation and Development, 14(1):5-23 Sørensen PN, Bekele S (2009) Nice children don't eat a lot of food: Strained livelihoods and the role of aid in north Wollo, Ethiopia. Forum for Social Studies, Addis Ababa, Ethiopia, pp 5-230 Spielman DJ, Kelemwork D, Alemu D (2011) Seed, fertilizer, and agricultural extension in Ethiopia. Ethiopian strategy support program (ESSP II), Working Paper No. 20, pp 4-8 Stocking M, Murnaghan N (2000) Land degradation guidelines for field assessment. http://archive.unu.edu/env/plec/l-degrade/index-toc.html. Cited 15 Mar 2010 UN University site Sys C, Ransi V, Debaveye J, Beernaert F (1993) Land evaluation, Part III, Crop Requirements. Agriculture Publication No. 7, ITC, Ghent, pp 7-178 Tadesse G (2001) Land degradation: A challenge to Ethiopia. Journal of Environmental Management, 27(6):815-824 Tamene L, Vlek PLG, Park SJ, Dikau R (2006) Analysis of factors determining sediment yield variability in the highlands of northern Ethiopia. Geomorphology, 76:76-91 Tefera B, Ayele G, Atnafe Y, Jabbar MA, Dubale P (2002) Nature and causes of land degradation in the Oromiya Region: A review. Socio-economic and policy research, Working Paper No. 36, International Livestock Research Institute (ILRI), Nairobi, Kenya, pp 18-35 Tefera M, Chernet T, Harro W (1996) Explanation on geological map of Ethiopia a 1:2,000,000 scale. Bulletin No 3, Addis Ababa, Ethiopia, pp 2-64 Tekle K (1999) Land degradation problems and their implications for food shortage in south Wello, Ethiopia. Environmental Management, 23(4):419-427 Terrill C (1986) Ethiopia: Children of the drought. Elsevier Science Ltd. 328(8508): 681-681 Tesfaye K, Walker S (2004) Matching of crop and environment for optimal water use: The case of Ethiopia. Physics and Chemistry of the Earth, 29(15-18):1061-1067 148

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