Krause R. (undated). Mechanization contribution to high level sustainable production: From tillage to mechanical weed control. University of Kassel. Dept of Agric Engineering. Nordbahnhofstr. 1 a, 37213. Witzenhausen.
Kumwenda W.F. 1990. Tillage and water management on amll rainfed farms of Malawi. In “Proceedings of the 1st Annual Scientific Conference” (M. Kronen, ed.). pp. 251-256. 8-10 October 1990, SADCC, Land and Water Management Research Programme, Gaborone, Botswana.
Lal, R. 1988. Soil degradation and the future of agriculture in sub-saharan Africa. J. Soil Water Conserv. 43:444- 451.
Lal, R. 1990. Low resource agriculture alternatives in sub- saharan Africa. J. Soil Water Conserv.45:437-445.
Lal, R. 1992. Institutional and manpower constraints on soil research in Africa. P.45-48. In K. Tato and H. Hurni (ed.) Soil Conservation for survival. Soc., Ankeny, IA.
Lal R., 1993a. Technological base for agricultural sustainability in Sub-Saharan Africa. In: Technologies for sustainable agriculture in the tropics: Proceedings of an international symposia. American Society of Agronomy. San Antonio Texas.
Lal R., 1993b. Technological options towards sustainable agriculture for different ecological regions in Sub- Saharan Africa. In: Technologies for sustainable agriculture in the tropics: proceedings of an international symposia. American Society of Agronomy. San Antonio Texas.
Lele, U. 1991. Aid to African agriculture; Lessons from two decades of donor experience. World Bank Report, The John Hopkins Univ. Press, Baltimore, MD.
Ley G.T. 1990. Tiallage and water management in in Southern Highlands of of Tanzania. In: Proceedings of the 1st annual Scientific Conference, SADCC Land and Water Mangment Research Programme. Saccar, Gaborone. Botswana. M. Kronen (ed) pp. 225-232
Maher, C. (1950). Soil Conservation in Kenya Colony: Part I. Factors Affecting Erosion, Soil Characteristics and Methods of Conservation: Part II: Soil Conservation Practice: Organisation and Legislation: Present Position and Outlook. In the Empire J. of Experimental Agriculture: Vol.XVIII (1950): No.71: 137-149; No.72: 233-248.
Mashavira T.T., H.H. Dhliwayo, P.S. Mazike and S.J. Twomlow. 1997. Agronomic consequences of reduced tillage. Cotton Research Institute, P. Bag 765, Kadoma, Harare
Mbanje E. 1997. Analysis of factors to reduce draught requirement on animal-drawn tillage implements. Agritex, Institute of Agricultural Engineering, Zimbabwe.
MLAAR 1992. The Second Annual Report for Communal Area Farm Units, 1989/90 Crop Season. Harare, Zimbabwe: Economics and Markets Branch, Ministry of Lands, Agriculture and Rural Resettlement.
Mrema G.C. 1996. Agricultural development and the environment in sub-Saharan Africa: An engineer’s perspective. Keynote paper presented at the First International Conference on Agricultural Engineering,
the Environmental and Development organised by the Southern and Eastern Africa Society of Agricultural Engineers (SEASAE), Arusha, Tanzania, October 2-4, 1996.
Mukanda, N. 1993. The comparison and rehabilitation of the soil resources of Zambia. In “Proceedings of the 4th Annual Scientific Conference” (M. Kronen, ed.). pp. 396-407.
Mwendera E.J. 1992. Analysis of the effect of tillage on soil water Conservation. Dissertationes de Agricultura. Katholieke Universiteit te Laiven. Doctarvaatsproefschrift Nr.221 de Faculteit der Landbouwwetenschappen van de K.U. Leuven.
Mwinjilo M.L. 1992. Animal traction technology in Malawi: Potential and condtraints In: Animal traction for Development. P.Starkey, E.Mwenya and J. Stares (eds) pp. 18-23 ATNESA. Zimbabwe.
Nyagumbo, I,, 1998. Experiences with conservation tillage practices in Southern and Eastern Africa: A Regional Perspective. Paper presented at Conservation Tillage for Sustainable Agriculture International Workshop, Harare, Zimbabwe 22-26 June 1998
Nyagumbo, I. 1993. Part II: Farmer Participatory Research in Conservation Tillage: Practice Experience with no-till tied ridging in Communal Areas lying in the Sub- humid north of Zimbabwe. In “Proceedings of the 4th Annual Scientific Conference” (M. Kronen, ed.), pp. 236-249. 11-14
Nyagumbo, I. 1997. Socio-cultural constraints to small- holder farming development projects in Zimbabwe: A review of experiences from farmer participatory research in conservation tillage. The Zimbabwe Science News 31, 2, 42-48, April/June 1997.
Prentice, A.N. 1946. The tied ridges. East Agrican Agric.J.12:101-108
Riches C.R., S.J. Twomlow and H. Dhliwayo. 1997. Low- input weed management and conservation tillage in semi-arid Zimbabwe. Expl Agric. (1997), volume 33, pp. 173-187
Shumba, E.M., S.R. Waddington and M. Rukuni 1992. Use of tine tillage with atrazine weed control, to permit earlier planting of maize by smallholder farmers in Zimbabwe, Experimental Agriculture 28:443-452
Sorokin P.P. 1986. Trends of Agricultural Mechanization in India. Paper No. 86-5507 American Society of Agricultural Engineers. St. Joseph MI. 49085-9659
Starkey P.H. A world-wide view of animal traction highlighting some key issues in eastern and southern Africa. In: Starkey P.H., E. Mwenya and Stares (Eds).
Improving Animal Traction Technology (pp 66-
. Lusaka Zambia. February, 1992.
Vlek, P.L.G. 1993. Strategies for sustaining agriculture in sub-saharan Africa. The fertilizer technology issue. p.265-277. In J.Ragland and R. Lal(ed.) Technologies for sustainable agriculture in the Tropics. ASA Spec. Publ.ASA., CSSA, and SSSA, Madison, WI, World Bank.
Wicks J. 1996. Agricultural Engineering Strategy Formulation: Guidelines and Procedures. Draft report prepared for the Agricultural Engineering Service. gricultural Support Systems Division. FAO, Rome, Italy.
This paper is published in: Kaumbutho P G and Simalenga T E (eds), 1999. Conservation tillage with animal traction. A resource book of the
Animal Traction Network for Eastern and Southern Africa (ATNESA). Harare. Zimbabwe. 173p. A publication supported by French Cooperation, Namibia. For details of ATNESA and its resource publications, see http://www.atnesa.org