Full Length Research Paper
References
Alpizar E, Bertrand B (2004). Incidence of elevation on chemical composition and beverage quality of coffee in Central America.In: 20th International Conference on Coffee Science (ASIC), 11-15 October, 2004, Bangalore, India, pp. 322-327. |
|
Austin MP, Cunningham RB, Fleming PM (1984). New approaches to direct gradient analysis using environmental scalars and statistical curve-fitting procedures. Vegetatio 55: 11-27. |
|
Avelino J, Bernardo B, Araya JC, Fonseca C, Davrieux F, Guyot B, Cilas C (2005). Effects of slope exposure, altitude and yield on coffee quality in two altitude terroirs of Costa Rica, Orosi and Santa Maria de Dota. Journal of the Science of Food and Agriculture 85:1869-1876. |
|
Bacha DM (2007). Assessment of forest coffee value chains in Ethiopia: A case study in Kaffa zone, Gimbo district. MSc Thesis from Rheinische Friedrich-Wilhelms-Universitätzu Bonn, Bonn, Germany. |
|
Barbosa JN, Borém FM, Cirillo MÂ, Malta MR, Alvarenga AA, Alves HMR (2012). Coffee quality and its interactions with environmental factors in Minas Gerais, Brazil. Journal of Agricultural Science 4:181-190. |
|
Barker AV, Pilbeam DV (2007).Introduction.In: Allen VB, David JP (eds.), Handbook of Plant Nutrition, CRC Press, USA, pp. 3-18. |
|
Beining AM (2007). Ecophysiological diversity of wild Coffeaarabica populations in Ethiopia: Drought adaptation mechanisms. Institut für Nutzpflanzenwissenschaften und Ressourcenschutz - Fachbereich Pflanzenernährung - der Rheinischen Friedrich-Wilhelms-Universität Bonn. Bonn, Germany. |
|
Brando J (2004). Harvesting and green coffee processing.In: Witngens JN (ed.), Coffee: Growing, processing, sustainable production. A guidebook for growers, processors, traders and researchers. Wiley-VCH Verlag GmbH & Co. KgaA, pp. 604-717. |
|
Bray RH, Kurtz LT (1945). Determination of total, organic and available forms of phosphorus in soils. Soil Science 59:39-45. |
|
Cannell MGR (1985). Physiology of the coffee crop.In: N. M. Clifford and K. C. Willson (eds.), Coffee: Botany, biochemistry and production of beans and beverage, Croom Helm, London, pp. 108-134. |
|
Caplan RH (1978). A practical approach to quality control.Third edition. Business Books Limited, London. |
|
Chapin III FS, Matson PA, Mooney HA (2002).Principles of terrestrial ecosystem ecology. Springer-Verlag New York, Inc. |
|
Costell E (2002). A comparison of sensory methods in quality control. Food Quality and Preference 13: 341-353. |
|
CRI (Coffee Research Institute) (2001). Coffee quality and environmental conditions. Coffee Research Newsletter 1(3):4-6. |
|
Da Silva EA, Mazzafera P, Brunini O, Sakai E, Arruda FB, Mattoso LH, Carvalho CRL, Pires CM (2005). The influence of water management and environmental conditions on the chemical composition and beverage quality of coffee beans. Brazilian Journal of Plant Physiology 17: 229-238. |
|
Day PR (1965). Hydrometer method of particle size analysis, pp. 562-563.In: C.A. Black (ed.) Methods of soil analysis. American Society of Agronomy, Madison, Wisconsin. |
|
De Groot CC, Marcelis LFM, van den Boogaard R, Kaiser WM, Lambers H (2003). Interaction of nitrogen and phosphorus nutrition in determining growth. Plant and Soil 248:257-268. |
|
Decazy F, Avelino J, Guyot B, Perriot JJ, Pineda C, Cilas C (2003). Quality of different Honduran coffees in relation to several environments. Journal of Food Science 68:2356-2361. |
|
Descroix F, Snoeck J (2004). Environmental factors suitable for coffee cultivation.In:WintgensJN (ed.). Coffee: Growing, processing, sustainable production. A guidebook for growers, processors, traders and researchers. Wiley-VCH Verlag GmbH & Co. KgaA, pp. 164-177. |
|
Descroix F, Wintgens JN (2004). Establishing a coffee plantation, In: Witngens, J.N. (ed.), Coffee: Growing, processing, sustainable production. A guidebook for growers, processors, traders and researchers. Wiley-VCH Verlag GmbH & Co. KgaA, pp. 178-245. |
|
Dray S (2008). On the number of principal components: a set of dimensionality based on measurements of similarity between matrices. Computational Statistics and Data Analysis 52:2228-2237. |
|
Dubale P, Mikru Z (1994). Ecology and soils of major coffee growing regions of Ethiopia. In: Paulos Dubale (ed.), Mineral fertilization of coffee in Ethiopia. Institute of Agricultural Research, Addis Ababa, Ethiopia. |
|
Fageria NK (2009). The use of nutrients in crop plants. CRC Press, New York, USA. |
|
Feria-Morales AM (2002). Examining the case of green coffee to illustrate the limitations of grading systems/expert tasters in sensory evaluation for quality control. Food Quality and Preference 13: 355-367. |
|
Fisken D (1990). Sensory quality and the consumer: viewpoints and directions. Journal Sensory Studies 5:203-209. |
|
Friis I (1986). Zonation of forest vegetation on the south slopes of Bale Mountains, South Ethiopia. SINET: Ethiopian Journal of Science 9:29-44. |
|
Fu BJ, Liu, Ma KM, Zhu YG (2004). Relationships between soil characteristics, topography and plant diversity in a heterogeneous deciduous broad-leaved forest near Beijing, China. Plant and Soil 261:47-54. |
|
Geeraert L, Berecha G, Honnay O, Aerts R (2019). Organoleptic quality of Ethiopian Arabica coffee deteriorates with increasing intensity of coffee forest management. Journal of Environmental Management 231:282-288. |
|
Gichimu BM, Gichuru EK, Mamati GE, Nyende AB (2012).Selection of Ruiru 11 hybrid sibs on raw coffee quality. African Journal of Horticultural Science 6:72-82. |
|
Guoqing L, Xiaoan W, Hua G, Zhihong Z (2008). Effects of ecological factors on plant communities of Ziwuling Mountain, Shaanxi Province, China. Acta Ecologica Sinica 28:2463-2471. |
|
Hay RKM, Porter JR (2006). The physiology of crop yield. Second edition. Blackwell Publishing Ltd., Singapore. |
|
Hillan J (1988). The Bale Mountains National Park area, southeast of Ethiopia and its management. Mountain Research and Development 8:253-288. |
|
Hawkesford M, Horst W, Kichey T, Lambers H, Schjoerring J, Møller IS, White P (2012). Functions of macronutrients.In: MarschnerP (ed.), Marschner's Mineral Nutrition of Higher Plants. 3rd edition. Elsevier Ltd., USA. |
|
Hopkins WG, Hüner NPA (2009).Introduction to plant physiology.Forth edition.John Wiley & Sons, Inc. USA. |
|
Hundera K, Aerts R, Fontaine A, Van Mechelen M, Gijbels P, Honnay O, Muys B (2013). Effects of coffee management intensity on composition, structure, and regeneration status of Ethiopian moist evergreen Afromontane forests. Environmental Management 51:801-809. |
|
ISO (2000) International Standard ISO 9000: 2000. Quality management systems - Fundamentals and vocabulary, 29 pp. |
|
ITC (International Trade Centre) (2011a). Ethiopian coffee quality improvement project. 2011 AID for trade global review: Case study. |
|
International Trade Centre (ITC), Geneva, Switzerland. |
|
ITC (International Trade Centre) (2011b). The coffee exporter's guide - Third edition. Geneva, Switzerland, xvi, 247p. |
|
Jackson ML (1958).Soil chemical analysis.Prentice Hall, Inc.New Jersy. |
|
James FC, McCulloch CE (1990). Multivariate analysis in ecology and systematics: Panacea or Pandora's box? Annual Review of Ecology and Systematics 21:129-66. |
|
Jongman RHG, terBraak CJF, van Tongeren OFR (1987). Data analysis and community and landscape ecology. Pudoc Wageningen, The Netherlands. |
|
Kilambo D, Mlwilo B, Mtenga D, Maro G (2015). Effect of soils properties on the quality of compact Arabica hybrids in Tanzania. American Journal of Research Communication 3:15-19. |
|
Knopp S, Bytof G, Selmar D (2006). Influence of processing on the content of sugars in green Arabica coffee beans. European Food Research and Technology 223:195-201. |
|
Kodama Y (2007). New role of cooperatives in Ethiopia: the case of Ethiopian coffee farmers' cooperatives. African Study Monographs, Supplementary 35:87-108. |
|
Krug CA, de Poerck RA (1968). World coffee survey. Food and Agriculture Organization of the United States, Rome, Italy. |
|
Kufa T (2006). Ecophysiological diversity of wild Arabica coffee populations in Ethiopia: Growth, water relations and hydraulic characteristics along a climatic gradient. Ecology and Development Series No. 46. |
|
Läderach P (2007). Management of intrinsic quality characteristics for high-value specialty coffees of heterogeneous hillside landscapes PhD dissertation from Rheinischen-Wilhelms-Universitätzu Bonn, Germany. |
|
Läderach P, Oberthür, Cook S, Fujisaka S, Estrada Iza M, Pohlan JA (2006). Systematic agronomic farm management for improved coffee quality. |
|
Lepš J, Šmilauer P (2003). Multivariate analysis of ecological data using CANOCO. Cambridge University Press, Cambridge. |
|
Leroy T, Ribeyre F, Bertrand B, Charmetant P, Dufour M, Montagnon C, Marraccini P, Pot D (2006). Genetics of coffee quality. Brazilian Journal of Plant Physiology 18:229-242. |
|
Liebhold AM, Gurevitch J (2002). Integrating the statistical analysis of spatial data in ecology.Ecography25:553-557. |
|
Lindsay WL, Norvell WA (1978).Development of a DTPA soil test for zinc, iron, manganese, and copper. Soil Science Society of America Journal 42: 421-428. |
|
Lochner RH, Mater JE (1990). Designing for quality: an introduction to the best of Taguchi and Western methods of statistical experimental design.Springer, Netherland. |
|
MacMahonMJ, KofranekAM, Rubatzky VE (2007). Hartmann's plant science: Growth, development and utilization of cultivated plants. Fourth edition. Pearson Education, Inc., USA. |
|
Mazzafera P (1999). Mineral nutrition and caffeine content in coffee leaves. Bragantia 58:387-391. |
|
Menon SN (1992). Interconnection between postharvest processing and the intrinsic quality of coffee.In: ASIC (ColloqueScientifique International sur le Café), San Francisco, USA. |
|
Mintesnot A, Dechassa N, Mohammed A (2015). Association of Arabica coffee quality attributes with selected soil chemical properties. East African Journal of Sciences 9:73-84. |
|
Muschler RG (2001). Shade improves coffee quality in a sub-optimal coffee-zone of Costa Rica. Agroforestry Systems 85:131-139. |
|
Neilson J (2007). Institutions, the governance of quality and on-farm value retention for Indonesian specialty coffee. Singapore Journal of Tropical Geography 28:188-204. |
|
Ngugi K, Aluka P, Maina D (2016). Variation of mineral micronutrient elements in Robusta Coffee (Coffea canephora Pierre ex A.Froehner) as measured by energy dispersive X-ray Fluorescence. Annual Research and Review in Biology 9: 1-13. |
|
Pallardy SG (2008). Physiology of woody plants, third edition, Elsevier Inc., USA. |
|
Peres-Neto PR, Legendre P, Dray SP, Borcard D (2006). Variation partitioning of species data matrices: estimation and comparison of fractions. Ecology 87:2614-2625. |
|
Perroit JJ, Ribeyre F, Montagnon C (2006). The qualities of the coffee.In: Christophe Montagnon (ed.), Coffee: terroirs and qualities. ÉditionsQuæ, France, pp. 11-20. |
|
Pereira MC, Chalfoun SM, de Carvalho GR, Savian TV (2010). Multivariate analysis of sensory characteristics of coffee grains (Coffea arabica L.) in the region of upper Paranaíba. Acta Scientiarum. Agronomy, Maringá 32:635-641. |
|
Prodolliet J (2004). Coffee quality assurance: Current tools and perspectives, In: 20th ASIC (International Conference on Coffee Science), 11-15 October, Bangalore, India, pp. 120-145. |
|
Raven PH, Berg LR, Hassenzahl DH (2010). Environment. John Wiley & Sons, Inc., USA. |
|
Roy RN, Finck A, Blair GJ, Tandon HLS (2006). Plant nutrition for food security. A guide for integrated nutrient management. Fertilizer and Plant Nutrition Bulletin No. 16. Food and Agriculture Organization of the United Nations, Rome, Italy. |
|
Sanchez CA (2007). Phosphorus.In: Allen V. Barker and David J. Pilbeam (eds.), Handbook of Plant Nutrition, CRC Press, USA, pp. 51-90. |
|
Schmitt C (2006). Montane rainforest with wild Coffee arabica in the Bonga region (SW Ethiopia): plant diversity, wild coffee management and implications for conservation. Ecology and Development Series, No. 47. |
|
Senbeta F (2006). Biodiversity and ecology of Afromontane rainforests with wild Coffea Arabica L. populations in Ethiopia. Ecology and Development Series No. 38. |
|
Senbeta F, Denich M (2006). Effects of wild coffee management on species diversity in the Afromontane rainforests of Ethiopia. Forest Ecology and Management 232:68-74. |
|
Sokal RF, Rohlf FHJ (1995). Biometry, 3rd ed. W.H. Freeman, San Franscico, p. 887. |
|
Tafesse A (1996). Agro-ecological zones of southwest Ethiopia. Matreialien Zur Ostafrica-Forschung, 13. |
|
Tagliaferro FS, De Nadai Fernandes EA, Bacchi MA, Bode P, Joacir De França E (2007). Can impurities from soil-contaminated coffees reach the cup? Journal of Radio Analytical and Nuclear Chemistry 271:371-375. |
|
Taiz L, Zeiger E (2002). Plant Physiology, third edition. Sinauer Associates, Sunderland, p. 623. |
|
terBraak CJF, Smilauer P (2002). CONOCO for Windows Version 4.5, 1997-2002. Biometris - Plant Research International. Wageningen, The Netherlands. |
|
Tolessa K, Duchateau L, Boeckx P (2018). Analysis of coffee quality along the coffee value chain in Jimma zone, Ethiopia. African Journal of Agricultural Research 13:1468-1475. |
|
Vaclavik VA, Christian EW (2008).Essentials of food science. Springer Science and Business Media, LLC., New York, USA. |
|
van der Wollenberg AL (1977). Redundancy analysis. An alternative for canonical correlation. Psychomerika 42:207-219. |
|
Walkley A, Black CA (1934). An examination of Degtjareff method for determining soil organic matter and proposed modification of the chromic acid titration method. Soil Science 37:29-38. |
|
Wilcke W, Oelmann Y, Schmit A, Valarezo C, Zech W, Homeier J (2008). Soil properties and tree growth along an altitudinal transect in Ecuadorian tropical montane forest. Journal of Plant Nutrition and Soil Science 171:220-230. |
|
Wilcke W, Valladarez H, Stoyan R, Yasin S, Valarezo C, Zech W (2003). Soil characteristics on a chronosequence of landslides in montane rainforest, Ecuador. Catena 53:79-95. |
|
Willson KC (1999). Coffee, cocoa, and tea. CABI International, UK. |
|
Wintgens JN (2004a). Factors influencing the quality of green coffee, In: Wintgens JN (ed.), Coffee: Growing, processing, sustainable production. A guidebook for growers, processors, traders and researchers. Wiley-VCH Verlag GmbH & Co. KgaA, pp. 789-809. |
|
Wintgens JN (2004b). Coffee bean quality assessment, In: Witngens, J.N. (ed.), Coffee: Growing, processing, sustainable production. A guidebook for growers, processors, traders and researchers. Wiley-VCH Verlag GmbH & Co. KgaA, pp. 810-819. |
|
Yadessa A, Burkhardt J, Bekele E, Hundera K, Goldbach H (2019). The role of soil nutrient ratios in coffee quality: Their influence on bean size and cup quality in the natural coffee forest ecosystems of Ethiopia. African Journal of Agricultural Research 14:2090-2103. |
|
Yadessa A, Burkhardt J, Denich M, Gole TW, Bekele E, Goldbach H (2008a). Influence of soil properties on cup quality of wild Arabica coffee in coffee forest ecosystem of SW Ethiopia. In: 22nd International Conference on Coffee Science (ASIC), held between 14-19 September 2008, Campinas, SP Brazil, pp. 1066-1075. |
|
Yadessa A,Burkhardt J, Denich M, Gole TW, Bekele E, Goldbach H (2008b). Sensory and bean characteristics of wild Arabica coffee from southeast Afromontane rainforests in Ethiopia. In: 22nd International Conference on Coffee Science (ASIC), held between 14-19 September 2008, Campinas, SP, Brazil, pp. 617-624. |
|
Yadessa A, Itanna F, Olsson M (2001). Contribution of indigenous trees to soil properties: The case of scattered trees of Cordia africana Lam. in croplands of western Oromia. Ethiopian Journal of Natural Resources 3:245-270. |
|
Yadessa A, Lakew B, Mulat E, Atlabatchew W, Anbessa Y (1999). Management of the declining soil fertility in the mixed farming system of Adaa Bargaa district, Oromia National Regional State, Ethiopia. Ethiopian Agricultural Research Organization (EARO) and International Centre for development-oriented Research in Agriculure (ICRA), Saint George Printing Press, Addis Ababa, Ethiopia, pp. x+109. |
|
Yadessa A, Itanna F, Olsson M (2009). Scattered trees as modifiers of agricultural landscapes: the role of waddeessa (Cordia africana Lam.) trees in Bako area, Oromia, Ethiopia. African Journal of Ecology 47(Suppl. 1):78-83. |
|
Yimer F, Ledin S, Abdulkadir A (2006). Soil property variations in relation to topographic aspect and vegetation community in the south-eastern highlands of Ethiopia. Forest Ecology and Management 232:90-99. |
|
Zhang J, Oxley RRB (1994). A comparison of three methods of multivariate analysis of upland grasslands in North Wales. Journal of Vegetation Science 5:71-76. |
Copyright © 2024 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0