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References

AAU (Addis Ababa University). 1983. Annual Report 1977-82. Debre Zeit Agricultural Research Centre, Debre Zeit, Ethiopia.

Abate Tedla. 1984. Results of 1983/84 forage network trials. ILCA Highlands Programme. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Abate Tedla and Mohamed-Saleem M A. 1992. Cropping systems for Vertisols of the Ethiopian highlands. In: Reports and papers on the management of Vertisols (IBSRAM/AFRICALAND). Reports of the Annual Review Meeting held in Nairobi Kenya, 4-6 March 1991. Network Document 1. IBSRAM (International Board for Soil Research and Management), Nairobi, Kenya. pp. 55-66.

Abate Tedla, Tekalign Mamo and Getinet Gebeyehu. 1992. Integration of forage legumes into cereal cropping systems in Vertisols of the Ethiopian highlands. Tropical Agriculture (Trinidad) 69(1):68-72.

Abiye Astatke and Matthews M D. 1980. Progress report of the cultivation trials at Debre Zeit and Debre Berhan. Highlands Programme, ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. 37 pp.

Abiye Astatke and Matthews M D. 1982. Progress report of the cultivation work at Debre Zeit and Debre Berhan. Highlands Programme, ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. 25 pp.

Abiye Astatke, Jutzi C S and Abate Tedla, 1989. Sequential cropping of Vertisols in the Ethiopian highlands using a broadbed-and-furrows system. ILCA Bulletin 34:15-20. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Abiye Astatke, Airaksinen H and Mohamed-Saleem M A. 1991. Supplementary irrigation for sequential cropping of Vertisols in the Ethiopian highlands using broadbed and furrow land management system. Agricultural Water Management 20(3):173-185.

Adugna Haile and Hiruy Belayneh. 1986. Influence of fertilizer and improved varieties on the seed yields of cereals, oil crops and pulses in the IAR/ADD sites. In: Desta Beyene (ed), Workshop on Review of Soil Science Research in Ethiopia, Addis Ababa, Ethiopia, 11-14 February 1986. IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia. pp. 68-73.

Ahmad N. 1983. Vertisols. In: Wilding L P, Smeck N E and Hall G F (eds), Pedogenesis and soil taxonomy. II. The soil orders. Elsevier, Amsterdam. pp. 91-123.

Ali Yimer. 1992. Nitrogen transformation in some Ethiopian highland Vertisols. PhD thesis, University College of Wales, Aberystwth, UK. 174 pp.

Ameha Sebsibe, Fletcher I An and Alemu Tadesse. 1991. The carrying capacity of unimproved native pasture in the cool highlands of Ethiopia. Paper presented at the 4th National Livestock improvement Conference, November 1991, Addis Ababa Ethiopia IAR (Institute of Agricultural Research), Addis Ababa Ethiopia.

ARDU (Arssi Rural Development Unit). 1980. Progress Report 5. Agricultural Engineering Section. ARDU Publication 14. Arssi Rural Development Unit and Ministry of Agriculture and Settlement, Addis Ababa Ethiopia.

Asnakew Woldeab. 1988. Physical properties of Ethiopian Vertisols. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. pp. 111-123.

Beets W C. 1982. Multiple cropping and tropical farming systems. Gower Publishing Co. Ltd., Aldershot, Hants, UK 156 pp.

Belay Simane. 1989. Agroclimatic analysis to assess crop production potentials in Ethiopia. ICRISAT/AUA, Department of Plant Science, Alemaya Ethiopia. 51 pp.

Berhanu Debele. 1985. The Vertisols of Ethiopia Their properties, classification and management. 5th Meeting of the Eastern African Soil Correlation and Land Evaluation Sub-Committee, 4-10 December 1983, Wad Medani Sudan. World Soil Resources Report 56. FAO (Food and Africulture Organization of the United Nations), Rome. pp. 31-54.

Blokhuis W A. 1982. Morphology and genesis of Vertisols. In: Vertisols and rice soils of the tropics. Transactions of the 12th International Congress of Soil Science, New Dehli India 8-16 Feb 1982. International Society of Soil Science, New Dehli India. pp. 23-47.

Bull T A. 1988. Agroecological assessment of Ethiopian Vertisols. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds). Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. pp. 89-105.

Bumb B L. 1991. Trends in fertilizer use and production in sub-Saharan Africa, 1970-95: An overview. Fertilizer Research 28:41-40.

Burford J R. 1987. Strategies for maintenance of soil fertility. In: IBSRAM (International Board on Soil Research and Management), Management of Vertisols under semi-arid conditions. Proceedings of the First Regional Seminar on Management of Vertisols under Semi-Arid Conditions held in Nairobi, Kenya, 1-6 December 1986. IBSRAM, Bangkok, Thailand. pp. 299-309.

CIAT (Centro Internacional de Agricultura Tropicale). 1985. Improving pasture yields in acid soils. CIAT International 4(1):6-7. CIAT, Bogota Colombia.

Constable M. 1984. Resource for rural development in Ethiopia Working Paper 17. FAO/Ministry of Agriculture, Addis Ababa Ethiopia.

Desta Beyene. 1982a. Diagnosis of phosphorus deficiency in Ethiopian soils. Soil Science Bulletin 3. IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia. 18 pp.

Desta Beyene. 1982b. Micronutrient status of some Ethiopian soils. Soil Science Bulletin 4. IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia. 43 pp.

Desta Beyene. 1986. The response of pulse crops to N and P fertilizers. In: Desta Beyene (ed), Workshop on Review of Soil Science Research in Ethiopia Addis Ababa, Ethiopia, 11-14 February 1986 IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia. pp. 87-91.

Desta Beyene. 1988. Soil fertility research on some Ethiopian Vertisols. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa Proceedings of a conference held at ILCA, Addis Ababa, Ethiopia, 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. pp. 223-231.

Desta Beyene and Augaw Tsige, 1986. Nodulation studies on faba bean under Ethiopian conditions. Paper presented at the Seventh Annual Coordination Meeting of the ICARDA/IFAO Nile Valley Project on Faba Bean, 23-27 September 1986, Addis Ababa Ethiopia. ICARDA (International Centre for Agricultural Research in Dry Areas), Aleppo, Syria.

Doolette J B and Magrath W B (eds), 1990. Watershed development in Asia -strategies and technologies. World Bank Technical Paper 127. The World Bank, Washington, D.C.

Driessen P M and Dudal R. 1989. Geography formation, properties and use of the major soils of the world. Agricultural University, Wageningen and Catholic University, Luven.

FAO (Food and Agriculture Organization of the United Nations). 1978. Report of the agro-ecological zones project. Africa. World Resources report 48, FAO, Rome.

FAO (Food and Agriculture Organization of the United Nations). 1985. Assistance to land use planning in Ethiopia (geomorphology and soils). FAO, Rome.

FAO (Food and Agriculture Organization of the United Nations). 1988. A summary of the agricultural ecology of Ethiopia. FAO, Rome.

FAO/UNESCO (Food and Agriculture Organization of the United Nations/United Nations Educational, Scientific and Cultural Organization). 1985. Soil map of the world (revised). UNESCO, Paris.

Fisseha Itanna. 1992. Macro - and micronutrient distributions in Ethiopian Vertisol landscapes. PhD thesis, University of Hohenheim, Germany.

Fox R L and Kamprath E J. 1970. Phosphate sorption isotherms for evaluating the phosphorus requirements of soils. Soil Science Society of America Proceedings 34:902-907.

Freelaine D M and Wockner G H. 1986. A study of soil erosion on Vertisols of Eastern Darling Downs, Queensland: The effect of soil, rainfall and flow conditions on suspended sediment losses. Australian Journal of Scientific Research 24:159-172.

Gardner E A, Coughlan K J and Silburn D M. 1988. Soil water measurement and management on Vertisols in Queensland, Australia. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa, Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. pp. 131-165.

Getachew Asamenew. 1991. A study of the farming systems of some Ethiopian highland Vertisols areas (draft report). ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. 150 pp.

Getachew Asamenew and Mohamed-Saleem M A. 1992. Concepts and procedures for the development of improved Vertisol technology development in Ethiopia. In: Reports and papers on the management of Vertisols (IBSRAM/AFRICALAND). Reports of the Annual Review Meeting held in Nairobi Kenya, 4 6 March 1991. Network Document 1. IBSRAM (International Board for Soil Research and Management), Nairobi, Kenya. pp. 75-86.

Getachew Asamenew, Jutzi S C, McIntire J. Abate Tedla. 1988a. Diagnosis of traditional farming systems in some Ethiopian highland Vertisol areas (Abstract). In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. pp. 384-385.

Getachew Asamenew, Jutzi S C, Abate Tedla and McIntire J. 1988b. Economic evaluation of improved Vertisol drainage for food crop production in the Ethiopian highlands. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. pp. 263-283.

Getachew Asamenew, Jutzi S C, Abate Tedla, McIntire J and Ikavalko E. 1989. Improved draught power use for increased food and feed production on Ethiopian highland Vertisols. In: IAR Proceedings. Second National Livestock improvement Conference. IAR (Institute of Agricultural Research), Addis Ababa Ethiopia. pp. 216-221.

Goe M R. 1987. Animal traction on smallholder farms in the Ethiopian highlands. PhD dissertation. Department of Animal Science, Cornell University, Ithaca New York, USA.

Gryseels G. 1988. Role of livestock on mixed smallholder farms in the Ethiopian highlands. A case study from the Baso and Worena weredas near Debre Berhan. PhD thesis, Wageningen Agricultural University, The Netherlands. 249 pp.

Gryseels G and Anderson F M. 1983. Research on farm and livestock productivity in the central Ethiopian highlands: initial results, 1977-1980. ILCA Research Report 4. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. 52 pp.

Haque 1.1992. Use of legume biological nitrogen fixation in crop and livestock production systems. In: Mulongoy K, Gueye M and Spencer D S C. (eds), Biological nitrogen fixation and sustainability of tropical agriculture. A Wiley Saye Co-publication. pp. 423-437.

Haque I and Jutzi S C. 1984. Nitrogen fixation by forage legumes in sub-Saharan Africa: Potentials and limitations. ILCA Bulletin 20:2-13. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia.

Hague I, Nnadi L A and Mohamed-Saleem M A. 1986. Phosphorus management with special reference to forage legumes in sub-Saharan Africa. In: Haque I, Jutzi S C and Neate P J H (eds), Potential of forage legumes in farming systems of sub-Saharan Africa. Proceedings of a workshop held at ILCA, Addis Ababa Ethiopia 16-19 September 1985. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia. pp. 100-119.

Hiruy Belayneh. 1986. Drainage benefit for wheat, teff and chick-peas on heavy clay soil in central Ethiopia. In: Desta Beyene (ed), Workshop on Review of Soil Science Research in Ethiopia, Addis Ababa, Ethiopia, 11-14 February 1986. IAR (Institute of Agriculture Research), Addis Ababa, Ethiopia.

IAR (Institute of Agricultural Research). 1972. Holetta Agricultural Research Station, Progress report for the period April 1971 to March 1972. IAR, Addis Ababa, Ethiopia.

IAR (Institute of Agricultural Research). 1976. Holetta Agricultural Research Station, Progress report for the period April 1973 to March 1976. IAR, Addis Ababa Ethiopia.

IAR (Institute of Agricultural Research). 1977. Holetta Agricultural Research Station, Progress report for the period April 1975 to March 1976. IAR, Addis Ababa, Ethiopia.

IAR (Institute of Agriculture Research). 1989a. Holetta Agricultural Research Station, Progress report for the period April 1988 to March 1989. IAR, Addis Ababa, Ethiopia.

IAR (Institute of Agricultural Research). 1989b. Annual Report 1988. IAR, Addis Ababa, Ethiopia.

IAR (Institute of Agricultural Research). 1990. Holetta Agricultural Research Station, Progress report for the period April 1989 to March 1990. IAR, Addis Ababa, Ethiopia.

IBSRAM (International Board for Soil Research and Management). 1985. Report of the inaugural Workshop on the Management of Vertisols. IBSRAM, Bangkok, Thailand.

ICRISAT (International Crops Research institute for Semi-Arid Tropics). 1985. The tropicultor operator's manual: Field operations. ICRISAT, Patancheru, India. 62 pp.

ILCA (International Livestock Centre for Africa). 1988. Annual Report 1987. ILCA, Addis Ababa, Ethiopia.

ILCA (International Livestock Centre for Africa). 1989. Annual Report 1988. ILCA, Addis Ababa, Ethiopia.

ILO/FAO (International labour Organization/Food and Agriculture Organization of the United Nations). 1985. Report of the joint inter-agency mission on preparatory work for the establishment of an African Regional Network for Agricultural Tools and Equipment (Sudan, Ethiopia, Tanzania, Zambia, Botswana and Kenya), 26 January - 29 March 1985. ILO Geneva/FAO Rome.

Islam A, Ayanaba A and Sanders F E. 1980. Response of cowpea (Vigna unguiculata) to inoculation with mycorrhizal fungi and rockphosphate fertilization in some unsterilized Nigerian soils. Plant and Soil 54:107-117.

Jutzi S C and Goe M R. 1987. Draught animal power technologies for the highlands. Intensification of smallholder crop-livestock farming in the Ethiopian highlands. Highlands Research Site Working Document. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia 21 pp.

Jutzi S and Haque I. 1985. The effects of phosphorus and nitrogen/phosphorus fertilizers on the growth, nodulation and seed set of the three African clovers on a P-deficient Vertisol Paper presented at the Ninth World fertilizer Congress, Budapest, Hungary, 11-16 June 1984.

Jutzi S C and Mesfin Abebe. 1986. Improved agricultural utilization of Vertisols in the Ethiopian highlands - An inter-institutional approach to research and development. IBSRAM Networkshop in Africa on improved Vertisol Management, Nairobi (Kenya), 1-6 Dec 1986. IBSRAM (International Board for Soil Research and Management), Bangkok, Thailand.

Jutzi S, Anderson F M and Abiye Astatke. 1986. Low cost modification of the traditional Ethiopian tyne plough for land shaping and surface drainage of heavy clay soils: Preliminary results fromon-fram verifications. In: Starkey P and Ndiame F (eds), Animal power in farming systems. Proceedings of the West Africa Animal Traction Networkshop, 19-25 September 1986, Freetown, Sierra Leone. GTZ (German Technical Agency, Eschborn, Germany). pp. 127-132.

Jutzi S. Haque I and Abate Tedla. 1987a. The production of animal feed in the Ethiopian highlands: Potential and limitations In: IAR Proceedings. First National Livestock improvement Conference, Feb. 11-13, 1987, Addis Ababa, Ethiopia. IAR (Institute of Agricultural Research), Addis Ababa Ethiopia. pp. 141-142.

Jutzi S C, Getachew Asamenew, Haque I and Abate Tedla. 1987b. Intermediate technology for increased food and feed production from deep black clay soils in the Ethiopian highlands. In: Improving food crop production on small farms in Africa. FAO, Rome. pp. 373-383.

Jutzi S C, Anderson F M and Abiye Astatke. 1987c. Low cost modifications of the traditional Ethiopian tine plough for land shaping and surface drainage of heavy clay soils: Preliminary results from on-farm verification. ILCA Bulletin 27:28-31. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Jutzi S C, Haque I and Abate Tedla. 1987d. The production of animal feed in the Ethiopian highlands: Potentials and limitations. Paper presented at the First National Livestock improvement Conference, February 11-13, 1987, Addis Ababa, Ethiopia. IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia. pp. 141-142.

Jutzi S C, Abate Tedla Mesfin Abebe and Desta Beyene. 1988. Inter institutional modes of operation in research and development of improved Vertisol technologies for the Ethiopian highlands. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa, Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. pp. 389-398.

Kamara C S and Haque I. 1988a. Charactersitics of Vertisols at ILCA research and outreach sites in Ethiopia. Revised version. Plant Science Division Working Document B5. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Kamara C S and Haque I. 1988b. Soil moisture related properties of Vertisols in the Ethiopian highlands. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa Proceedings of a conference held at ILCA, Addis Ababa, Ethiopia 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. pp. 183-200.

Kamara C S and Haque I. 1988c. Physical properties of Vertisols and their implications for management: A review. Plant Science Division Working Document B7. ILCA (international Livestock Centre for Africa), Addis Ababa, Ethiopia.

Kamara C S and Haque I. 1991. intercropping maize and forage type cowpeas in the Ethiopian highlands: I. Growth and dry matter yields. II. Soil moisture, soil temperature, solar radiation regimes and water use efficiency. Plant Science Division Working Document B14. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Kamara C S and Haque I. 1992. Faidherbia Albida and its effects on Ethiopian highland Vertisols. Agroforestry Systems 18(1):17-29.

Kanwar J S. Kampen J and Virmani S M. 1982. Management of Vertisols for maximizing crop production. ICRISAT experience. In: Vertisols and rice soils of the tropics. Transactions of the Twelfth international Congress of Soil Science, New Delhi, India 8-16 February 1982. Indian Society of Soil Science, New Delhi, India. pp. 94-118.

Kanwar J S and Virmani S M. 1987. Management of Vertisols for improved crop production in the semi-arid tropics: A plan for a technology transfer network in Africa. In: Management of Vertisols under semi-arid conditions. IBSRAM Proceedings 6:157-In IBSRAM (International Board for Soil Research and Management), Bangkok, Thailand.

Lal R. 1984. Soil erosion from tropical arable lands and its control. Advances in Agronomy 37:183-248.

Lock R S and Coughlan K S. 1984. Effects of zero tillage and stubble retention on some properties of a cracking clay. Australian Journal of Soil Research 22:91-98.

Lulseged Gebre-Hiwot. 1985. The status of pasture and forage research in Ethiopia. Paper presented at the National Workshop on Livestock, Pasture and Forage Research in Ethiopia 8-10 January, 1985. IDRC (International Development Research Centre), Ottawa Canada.

Lulseged Gebrehiwot and Alemu Taddesse. 1985. Pasture research development in Ethiopia. In: Kategile J A (ed), Pasture improvement research in eastern and southern Africa. Proceedings of a workshop held in Harare, Zimbabwe, 17-21 September 1984. IDRC (International Development Research Centre), Ottawa Canada. pp. 77-91.

Luyindula N and Haque 1. 1992. Growth and nitrogen fixation in Sesbania species as affected by phosphorus, nitrogen and inoculation on highland Vertisol. Communications in Soil Science & Plant Analysis (submitted for publication).

Memon K S and Fox R L. 1983. Utility of phosphate sorption curves in estimating phosphorus requirements of cereal crops: wheat (Triticum aestivum): in: Proceedings of Third international Congress of Phosphorus Compounds. Brussels, Belgium. Institut mondial du phosphate, Casablanca Maroc. pp. 217-230.

Mesfin Abebe. 1979. Studies on soil fertility and drainage. Summary of research activities at Sheno sub-station, 1968-78. IAR (Institute of Agricultural Research), Addis Ababa, Ethiopia.

Mesfin Abebe. 1980. State of soil science development for agriculture in Ethiopia. Ethiopian Journal of Agricultural Sciences 2(2): 139-157.

Mesfin Abebe. 1981. Soil burning in Ethiopia. Ethiopian Journal of Agricultural Sciences 3(1):57-74.

Mesfin Abebe. 1982. Uses of improved seed-bed and fertilizers as an alternative to soil burning or guie. Ethiopian Journal of Agricultural Sciences 4(1):1-9.

Mesfin Abebe. 1990. Vertisols of Ethiopia Utilization and management with reflections on research and development. In: Jones C A and Gerik J J (eds). Workshop on Vertisol Management International Collaboration in Research, Training and Extension. June 25-29, 1990. Texas A & M University, College Station, Texas, USA.

Mieche A. 1986. Faidherbia albida and other multipurpose trees on the fur farmlands in the Jebel Marra higldands, Western Darfur, Sudan Agroforestry Systems 4:89-199.

Mitiku Haile. 1987. Genesis, characteristics and classification of soils of the central highlands of Ethiopia. PhD thesis, State University of Ghent, Belgium.

Mitiku Haile. 1991. Need for soil resources information for agro-technology transfer. Paper presented at the Second African Soil Science Society Conference, Cairo, Egypt, 4-10 November 1991.

Morgan R P C. 1980. Soil erosion. Longman House, Bum Mill, Harlow, Essex, UK. 113 pp.

Mugwira L M and Haque I. 1991. Variability in the growth and mineral nutrition of African clovers. Journal of Plant Nutrition 14(6):17-24.

Mukassa-Mugerwa E. 1981. A study of traditional livestock production in Ada district of Ethiopia. Mimeograph. ILCA (International Livestock Centre for Africa), Addis Ababa Ethiopia

Nnadi L A and Haque 1. 1985. Estimating phosphorus requirements of native Ethiopian clovers using phosphorus sorption isotherms. Paper presented at the International Conference on Soil Fertility in Humid Tropics, 21-26 July, 1985, Ibadan, Nigeria.

Nnadi L A and Haque I. 1988. Forage legumes in African crop-livestock production systems. ILCA Bulletin 30: 10-19. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia.

Piccolo A and Gobena Huluka. 1986. Phosphorus status of some Ethiopian soils. Tropical Agriculture (Trinidad) 63:137-142.

Poschen P. 1986. An evaluation of the Acacia albida based agroforestry practices in the Hararghe highlands of Eastern Ethiopia Agroforestry Systems 4:89-199.

Probert M E, Fergus I F. Bridge B J. McGarry D, Thompson C H and Russell J S. 1987. The properties and management of Vertisols CAB International, Wallingford, UK

Pulschen L. 1987. Terminal report for the period May 1983-April 1987. Soil and Plant Nutrition Section, Agricultural Centre, Debre Zeit, Ethiopia. 31 pp.

Roorda T M. 1984. Effects of soil burning (guie) on physico-chemical properties of soils in Sheno, Debre Berhan and Chacha area of Ethiopia. Dissertation submitted to the National Agricultural College, Deventer, The Netherlands, Department of Tropical Agriculture and to the International Livestock Centre for Africa, Ethiopia in partial fufillment of the requirements for the Degree of Agricultural Engineer.

Rose C W. 1960. Soil detachment caused by rainfall. Soil Science 89:28-35.

Sahlemedhin Sertsu. 1987. Investigation on the effect of a soil burning practice "guie" in Ethiopia on soil properties and barley yield PhD thesis, Justus-Liebig - Universitat Giebssen, Germany.

Selamyihun Kidanu. 1992. Hydrophysical characterization and soil- water-air interactions of Ethiopian highland Vertisols MSc thesis, International, Training Centre for Postgraduate Soil Scientists, University of Ghent, Belgium.

Shaw N H. 1961. Increased beef production from Townsville lucerne (Stylosanthes sumdaicad Tauh) in the spare grass pasture of Central Queensland. Australian Journal of Agriculture and Animal Husbandry 1:73-80.

Shaw N H. 1978. Superphosphate and stocking rate effect on native pasture oversown with Stylosanthes humilis in Central Coastal Queensland. 2. Animal production. Australian Journal of Experimental Agriculture and Animal Husbandry 18: 800-807.

Soil Survey Staff. 1975. Soil taxonomy. A basic system of soil classification for making and interpreting soil surveys. US Department of Agriculture Handbook 436. Government Printing Office, Washington, D.C.

Tamrat Tsegaye. 1992. Vertisols of the central highlands of Ethiopia. Characterization, classification and evaluation of the phosphorus status. MSc thesis, Alemaya University of Agriculture, Alemaya, Ethiopia.

Tekalign Mamo and Haque I.1986. Response of lucerne (Medicago Sativa) to phosphate fertilization and inoculation with Vesicular arbuscular mycorrhizal fungus in a phosphorus deficient Vertisol. ILCA Newsletter 5(3):5-6. International Livestock Centre for Africa, Addis Ababa, Ethiopia.

Tekalign Mamo and Haque I. 1987. Sulphur investigation in some Ethiopian soils. East African Agriculture and Forestry Journal 52(3): 148-156.

Tekalign Mamo and Haque I. 1988. Potassium status of some Ethiopian soils. East African Agriculture and Forestry Journal 53/3:123-130.

Tekalign Mamo and Haque I. 1991. Phosphorus status of some Ethiopian soils. III. Evaluation of soil test methods for available phosphorus. Tropical Agriculture (Trinidad) 68(1):51-56.

Tekalign Mamo, Haque I and Kamara C S. 1988. Phosphorus status of some Ethiopian highland Vertisols. In: Jutzi S C, Haque I, McIntire J and Stares J E S (eds), Management of Vertisols in sub-Saharan Africa. Proceedings of a conference held at ILCA, Addis Ababa Ethiopia, 31 August - 4 September 1987. ILCA (International Livestock Centre for Africa), Addis Ababa, Ethiopia. pp. 232-252.

Tesfaye Tessema and Dagnatchew Yirgou. 1973. Soil burning (gye). Its problems and possible solutions. Progress Report, Debre Zeit Agricultural Experiment Station, College of Agriculture, Ha e Selassie I University, Alemaya, Ethiopia 16 pp.

Tinker P B. 1978. Effects of vesicular-arbuscular mycorrhizas on plant nutrition and plant growth. Physio-Veg 16(4):743-751.

Tinker D B. 1989. Draught animal power implements for use on Vertisols. OD Consultancy Report OD/89/4, AFRC Engineering, Bedfordshire, UK 21 pp.

Tothill J C. 1974. Experiences in Soilo seeding Siratro into native spear grass pastures on granite soils near Mundubbera. Tropical Grasslands 8:128-132.

Virgo K H and Munro R N. 1978. Soil and erosion features of the Central plateau of Tigrai, Ethiopia. Geoderma 20:131-157.

Westphal E. 1975. Agricultural systems in Ethiopia. College of Agriculture, Ha e Selassie I University and Agricultural University of Wageningen. Agricultural Research Report 82611. Wageningen, The Netherlands. 278 pp.

Willcocks T J. 1984. Tillage requirements in relation to soil type in semi-arid rainfed agriculture. Journal of Agricultural Engineering Research 30: 327-336.
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