Prof. Samuel Mwonga

Prof. Samuel Mwonga

amuel Mutuku Mwonga, PhD

Associate Professor, Soil Fertility Management

Department of Crops, Horticulture and Soils,

Faculty of Agriculture,

Egerton University

P. O. Box 536, Egerton-20115, Kenya

Email: and


1991 Ph.D., Soil Fertility Cornell University, Ithaca, New York, USA
1987 M.Sc., Soil Science University of Nairobi, Kenya
1984 B.Sc. Agriculture McGill University, Montreal, Canada
2005 Diploma (IAR4D) International Centre for Research oriented Development in Agriculture, ICRA, Wageningen, The Netherlands


Soil Fertility Management


2013 Associate Professor, Department of Crops, Horticulture and Soils, Egerton University
1995-Present Senior Lecturer, Department of Crops, Horticulture and Soils, Egerton University
2006-Present Member, Egerton University Bioethics Management Committee for the UNESCO regional Centre for Documentation and Research
May 2006-January 2009 Chairman of the Department of Crops, Horticulture and Soils, Egerton University
2004 Faculty Representative to the Board of Undergraduate Studies (BUGS), Egerton University
2002-2004 Faculty Representative to the Senate, Faculty of Agriculture, Egerton University
1995-1998 and 2003-2004 Examination Officer, Department of Agronomy and Department of Soil Science, Egerton University
1999-2006 Trainer, Crop Management Research Training, KARI-CIMMYT-Egerton Project
1991- 1995 Lecturer, Department of Crops, Horticulture and Soils, Egerton University.
1987-1991 Research Assistant, Department of Soil, Crop and Atmospheric Sciences, Cornell University. USA




2013 – Present HORTINLEA Project – Diversifying food systems: Horticultural Innovations and Learning for Improved Nutrition and Livelihoods in East Africa. GlobE Food Security Systems Project. Funded by BMZ Federal Ministry of Economic Cooperation and Development, Germany.
2011- 2014 Multipurpose Legume Project (MLP). Funded under the Collaborative Crop Research Program (CCRP) of The McKnight Foundation, Minnesota, USA.
2008-2010 Dry Grain Pulses CRSP Project. Funded by USAID through the CRSP Project, Michigan State University.
2008-2011 Strengthening University Capacity for Promoting, Facilitating and Teaching Rural Innovation Processes, SUCAPRI Project. Funded by EDULINK, ACP-EU Programmes in Higher Education.


1 Khaemba, MJ, S.M. Mwonga, L.M. Mumera and L. Nakhone. 2011. Forage legume-cereal double cropping in bimodal rainfall highland tropics: The Kenyan case. In A. Bationo et. al. (eds.). Innovations as key to the Green Revolution in Africa. Pp271-279. Springer Science +Business Media BV. New York.
2 Kiiya, W.W., S.M. Mwonga, R.K. Obura, A.O Musandu and J.G. Ngugi. 2010. Effect of shade, lime and inorganic nitrogen on germination and growth of Sheep sorrel (Rumex acetosella L.) weed in North Rift, Kenya. Accepted for publication in African Journal of Agricultural Research.
3 Kiiya, W.W., S.M. Mwonga, R.K. Obura, J.G. Mureithi and J.G. Ngugi. 2008. Effect of liming and inorganic nitrogen on the growth of weeds in a potato cropping system: A case study in a Kenyan North Rift region. East African Agriculture and Forestry Journal. 2008 74: 23-31.
4 Onwonga, R.N., J.J. Lelei, B. Freyer, S.M. Mwonga and P. Wandahwa. 2008. Low cost technologies for enhancing N and P Availability and maize performance on acid soils. World Journal of Agricultural Sciences. 4: 862-873.
5 Cheruiyot, E.K, S.M. Mwonga, L.M. Mumera, I.M. Tabu, J.K. Macharia and J. K. Ngugi. 2007. Rapid decay of dolichos (lab lab purpureus L. Sweet) residue leads to loss of nitrogen benefit to succeeding maize (Zea mays L.). Australian Journal of Experimental Agriculture. 47: 1000-1007.


Management of soil fertility in low-input cropping systems; Nutrient fluxes and sustainable soil fertility management.
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