Teff (Eragrostis tef) production constraints on Vertisols in Ethiopia: farmers' perceptions and evaluation of low soil zinc as yield-limiting factor

References

• Ahumada, TI , Bustamanate, A , and Schalcha, EB , 1997. Zinc speciation in phosphate-affected soils , Comm. Soil Sci. Plant Anal. 28 (1997), pp. 989–995.
   Web of Science ®Google Scholar
• Anonymous 2000: Agro Ecological Zonation of Ethiopia. Ministry of Agriculture, Addis Ababa, Ethiopia. http://www.fao.org/ag/AGP/AGPC/doc/counprof/ethiopia/ethiopia.htm (January, 2011).
   Google Scholar
• Anonymous 2010a: Agricultural Sample Survey 2009/2010: Report on Farm Management Practices, Statistical Bulletin 468, Volume III, p. 15. http://www.csa.gov.et/survey/Agricultural_Sample_Survery (January, 2011).
   Google Scholar
• Anonymous 2010b: Agricultural Sample Survey 2009/2010: Report on Crop and Livetock Product Utilization, Statistical Bulletin 468, Volume VII, p. 17. http://www.csa.gov.et/survey/Agricultural_Sample_Survery (January, 2011).
   Google Scholar
• Astatke, A , Mamo, T , Peden, D , and Diedhiou, M , 2004. Partcipatory on-farm conservation tillage trails in the Ethiopian highland vertisols: the impact of potassium application on crop yields , Exp. Agric. 40 (2004), pp. 369–379.
   Web of Science ®Google Scholar
• Berhe, T , , 2009: Recent Development in Teff, Ethiopia's Most Important Cereal and Gift to the World. http://www.slideshare.net (December, 2010).
   Google Scholar
• Blokhuis, WA , 1982. "Morphology and genesis of Vertisols: Vertisols and rice soils of the tropics". In: Transactions of the 12th International Congress of Soil Science . New Delhi: International Society of Soil Science; 1982. pp. 23–47.
   Google Scholar
• Bull, TA , , 1988: Agroecological Assessment of Ethiopian Vertisols: Management of Vertisols in Sub-Saharan Africa. ILCA, Addis Ababa, Ethiopia. http://www.fao.org/wairdocs/ILRI/x5493E/x5493e07.htm (January, 2011).
   Google Scholar
• Catlett, KM , Heil, DM , Lindsay, WL , and Ebinger, MH , 2002. Soil chemical properties controlling zinc2+ activity of 18 Colorado soils , Soil Sci. Soc. Am. J. 66 (2002), pp. 1182–1189.
   Web of Science ®Google Scholar
• D’Andrea, AC , 2008. T'ef (Eragrostis tef) in ancient agricultural systems of Highland Ethiopia , Econ. Bot. 62 (2008), pp. 547–566.
   Web of Science ®Google Scholar
• Dang, YP , Dalal, RC , Edwards, DG , and Tiller, KG , 1993. Understanding zinc reactions in vertisols to predict zinc responses by wheat , Plant Soil 155/156 (1993), pp. 247–250.
   Web of Science ®Google Scholar
• Day, PR , 1965. "Particle fractionation and particle-size analysis". In: Black, CA , ed. Method of Soil Analysis Part I . Madison, WI: American Society of Agronomy; 1965. pp. 545–567.
   Google Scholar
• Debele, B , , 1985: The Vertisols of Ethiopia: their properties, classification, and management. Fifth meeting of the East African sub-committee for soil correlation and land evaluation held in Wad medani, Sudan, 5–10 December 1983. In: World Soil Resources Report No. 56, pp. 31–54. Food and Agricultural Organization, Rome.
   Google Scholar
• Desta, B , 1983. "Micronutrient status of some Ethiopian soils". In: IAR Soil Science Bulletin No. 4 . Addis Ababa: Institute of Agricultural Research; 1983. p. 43.
   Google Scholar
• Efrem, B , 2001. "Performance of some cereals under drained Vertisols in the Ethiopian highland". In: Paulos, D , Asgelil, D , Asfaw, Z , Gezahegn, A , and Abebe, K , eds. Advances in Vertisol Management in Ethiopian Highlands . Addis Ababa: Ethiopian Agricultural Research Organization; 2001. pp. 151–157.
   Google Scholar
• Food and Agricultural Organization (FAO) 1987: Master Land Use Plan, Ethiopia Range/Livestock Consultancy Report prepared for the Government of the People's Democratic Republic of Ethiopia. Technical Report, AG/ETH/82/010, 94 pp. Food and Agricultural Organization, Rome.
   Google Scholar
• Food and Agricultural Organization (FAO) 1995: Country Information Brief: Ethiopia Food and Agriculture Organization of the United Nations. http://www.africa.upenn.edu/eue_web/fao_soil.htm (December, 2010).
   Google Scholar
• Food and Agricultural Organization (FAO) 2000: Problem Soils Database: Vertisols. http://www.fao.org/ag/agl/agll/prosoil/vert.htm (December, 2010).
   Google Scholar
• Food and Agricultural Organization (FAO) 2002: Web LocClim, Local Climate Monthly Estimator. http://www.fao.org/sd/locclim/srv/locclim.home (December, 2010).
   Google Scholar
• Food and Agricultural Organization (FAO), Cooperazion-Italiana, IGAD 1998: The Soil and Terrain Database for Northeastern Africa. Crop Production Systems Zones of IGAD Subregion. Land and Water Digital Media Series 2. Food and Agricultural Organization, Rome.
   Google Scholar
• Gao, X , Schröder, TJ , Hoffland, E , Zou, C , Zhang, F , and Van der Zee, SEATM , 2010. Geochemical modeling of zinc bioavailability for rice , Soil Sci. Soc. Am. J. 74 (2010), pp. 301–309.
   Web of Science ®Google Scholar
• Gebremedhin, B , Hirpa, A , and Kahsay, B , , 2009: Feed Marketing in Ethiopia. Results of Rapid Apprisal, 64 pp. International Livestock Research Institute, Addis Ababa. http://www.eap.gov.et/content/files/Documents/EAP Documents/Extension Development/newdoc/exten/Feed marketing in Ethiopia.pdf (January, 2011).
   Google Scholar
• Gebretsadikan, H , Haile, M , and Yamoah, CF , 2009. Tillage frequency, soil compaction and N-fertilizer rate effects on yield of teff (Eragrostis tef (Zucc) Trotter) in Central Zone of Tigray, North Ethiopia , Momona Eth. J. Sci. 1 (2009), pp. 82–92.
   Google Scholar
• Haque, l , Lupwayi, NZ , and Tadesse, T , 2000. Soil micronutrient contents and relation to other soil properties in Ethiopia , Comm. Soil Sci. Plant Anal. 31 (2000), pp. 2751–2762.
   Web of Science ®Google Scholar
• Hotz, C , and Brown, KH , 2001. Identifying population at risk of zinc deficiency: the use of supplementation trails , Nutr. Rev. 59 (2001), pp. 80–84.
   PubMed Web of Science ®Google Scholar
• Itanna, F , , 1996: Micronutrients status of three Ethiopia Vertisol landscapes at different agro ecological zones. In: The Proceeding of Third Conference of the Ethiopian Soil Science Society held in Addis Ababa, Ethiopia, 28–29 February 1996, pp. 153–161. Ethiopian Science and Technology Commision, Addis Ababa.
   Google Scholar
• Jackson, ML , 1967. Soil Chemical Analysis . New Delhi: Prentice Hall of India; 1967.
   Google Scholar
• Jayne, TS , Govereh, J , Wanzala, M , and Demeke, M , 2003. Fertilizer market development: a comparative analysis of Ethiopia, Kenya and Zambia , Food Policy 28 (2003), pp. 293–316.
   Web of Science ®Google Scholar
• Khalili, M , Lindgren, E , and Varvikko, T , 1993. A survey of mineral status of soils, feeds and cattle in the Selale Ethiopian highlands. II Trace elements , Trop. Anim. Health Prod 25 (1993), pp. 193–201.
   PubMed Web of Science ®Google Scholar
• Lindsay, WL , and Norvell, WA , 1978. Development of DTPA soil test for zinc, iron, manganese and copper , Soil Sci. Soc. Am. J. 42 (1978), pp. 421–428.
   Web of Science ®Google Scholar
• Olsen, SR , Cole, CV , Watanabe, FS , and Deal, LA , 1954. Estimation of Available Phosphorus in Soil by Extraction with Sodium Bicarbonate . Washington, DC: Government Printing Office; 1954. pp. 1–19, USDA Circular 939.
   Google Scholar
• Rupa, TR , and Tomar, KP , 1999. Zinc desorption kinetics as influenced by pH and phosphorus in soils , Comm. Soil Sci. Plant Anal. 30 (1999), pp. 1951–1962.
   Web of Science ®Google Scholar
• Seyfu, K , , 1997: Tef. Eragrostis tef. Zucc.) Trotter. Promoting the Conservation and Use of Underutilized and Neglected Crops. 12 p. 35. Institute of Plant Genetic and Crop Plant Research, Gaterstleben/International Plant Genetic Resources Institute, Rome. http://www.underutilized-species.org/documents/PUBLICATIONS/tef.pdf (January 2011).
   Google Scholar
• Sharma, BD , Mukhopadhyay, SS , and Katyal, JC , 2006. Distrbution of total and DTPA zinc, copper, manganese, and iron in vertisols of India , Comm. Soil Sci. Plant Anal. 37 (2006), pp. 653–672.
   Web of Science ®Google Scholar
• Syers, JK , Nyamudeza, P , and Ahenkorah, Y , 2001. "Sustainable nutrient management of vertisols". In: Syers, JK , Penning de Vries, FWT , and Nyamudeza, P , eds. The Sustainable Managment of Vertisols . Wallingford: CABI Publishing; 2001. pp. 43–70.
   Google Scholar
• Tefera, H , and Belay, G , , 2006: Eragrostis tef, Zuccagni) Trotter. [Internet] Record from Protabase. In: Brink M. Belay G (eds) PROTA (Plant Resources of Tropical Africa/Ressources végétales de l’Afrique tropicale), Wageningen. http://database.prota.org/search.htm (December 2010).
   Google Scholar
• Teklu, Y , and Tefera, H , 2005. Genetic improvement in grain yield potential and associated agronomic traits of tef (Eragrostis tef) , Euphytica 141 (2005), pp. 247–254.
   Web of Science ®Google Scholar
• Tulema, B , Zapta, F , Aune, JB , and Sitaula, B , 2005. N fertilization, soil type and cultivars effects on N use efficiency in tef (Eragrostis tef (Zucc.) Trotter) , Nutr. Cycling Agroecosyst. 71 (2005), pp. 203–211.
   Web of Science ®Google Scholar
• Umeta, M , West, CE , and Fufa, H , 2005. Content of zinc, iron, calcium and their absorption inhibitors in foods commonly consumed in Ethiopia , J. Food Comp. Anal. 18 (2005), pp. 803–817.
   Web of Science ®Google Scholar
• Umeta, M , West, CE , Haidar, J , Deurenberg, P , and Hautvast, JGAJ , 2000. Zinc supplementation and stunted infants in Ethiopia: a randomozied controlled trail , Lancet 355 (2000), pp. 2021–2026.
   PubMed Web of Science ®Google Scholar
• Umeta, M , West, CE , Haidar, J , and Hautvast, JGAJ , 2003. Factors associated with stuning in infants aged 5–11 months in the Dodota-Sire District, rural Ethiopia , J. Nutr. 133 (2003), pp. 1064–1069.
   PubMed Web of Science ®Google Scholar