Collins Otieno Majengo
Tutorial Fellow
Faculty of Science, Department of Agriculture & Veterinary Sciences.
Biography
Academic Qualification
.
KCPE
| Inungo Primary School (1991-1999)
KCSE
| Barding Boys High School (2001-2004)
Bsc (Soil Science & Land Use Management)
| Moi University (2006-2010)
Msc (Soil Science)
| University of Eldoret (2011-2013)
PhD (Sustainable Agricultural Systems-Soil Science)
| Masinde Muliro University of Science and Technology(2021-Present)
Field of Specialization
Soil Chemistry
Soil Physics,
Soil Fertility and Plant Nutrition
Soil Genesis, Morphology and Classification
Membership of Professional Bodies
Soil Science Society of East Africa
Professional Training and Development
Career Progression
Career Progression
Present – July 2015
Tutorial Fellow (Soil Science)
Kibabii University, Bungoma
Reporting to: COD – AVS
Key Achievements
- Teaching Undergraduate students
- Conducting research on soil aspects
- Carrying out community outreach on food security
Feb 2015 – Nov 2014
Part – Time Lecturer (Soil Chemistry)
Masinde Muliro University Of Science And Technology (Mmust), Kakamega
Reporting to: COD – ALUM
Key Achievements
- Teaching undergraduate
DEC 2014 – Sept 2014
Part Time Lecturer. (Soil Science Units).
Bukura Agricultural College, Kakamega
Reporting to: HOD – Agronomy
Key Achievements
- Teaching diploma students soil science units
- Conducting Practicals
Aug 2014 – Nov 2013.
Field Agronomist (Compro/Pse Project)
International Institute Of Tropical Agriculture (IITA)
Reporting to: Field Technician
Key Achievements
- Implementation of Field experiments
- Data collections and Analysis
- Production of journal papers
March 2013 – Dec 2012
M & E Research Assistant (Spade Project).
Technoserve (Tns), Kisumu
Reporting to: M & E Director
Key Achievements
- Supervision of field enumerators
- Analyzing data
- Producing and Interpreting data outputs
Jan 2012- Aug 2010
Field Technician/ Msc Student – Bungoma (Compro 1 Project).
Tropical Soil Biology And Fertility (TSBF-CIAT),Nairobi
Reporting to: Principal Investigator
Key Achievements
- Coordinated data collections in Bungoma Mandate Area
- Soil and Plant samples were well collected
- Carried out Soil and Plant samples analysis at the lab
- Produced high impact journal papers and Poster presentations.
Service in University Committees
Service in University Committees
Leadership and Management Roles
Leadership and Management Roles
2020 – Present: Faculty/Departmental Examination/Timetable Coordinator , Department of Agriculture and Veterinary Science, Faculty of Science, Kibabii University.
13th – 17th June 2022: Acting Coordinator University Timetabling, Kibabii Univeristy
24th July 2017 To 4th September 2017: In-Charge (Agric & Vet Department), Faculty of Science, Kibabii University.
Service to the Community
Service to the Community
2022 – 2025
Inungo Secondary School, Board of Management
Role:Member
2018 – 2024
Inungo Primary School,Board of Management
Role:Member
2016 – 2019
Inungo ACK Parish Development Committee
Role:Member
2023
Kibabii University SACCO, Supervisory Committee.
Role:Secretary
2021
Kibabii University SACCO, Credit Committee
Role:Chairperson
Service in National, Regional and International Committees
Service in National, Regional and International Committees
2010 -2012
Compro project, Eldoret team, Global task force, Member
International Collaboration: Selected from a global pool of award winners to serve on a monthly working group focused on Commercial Rhizobial Innoculants characterization in tropical soils.
Professional Research Interest
.
Rhizobial and Myccorrhizae inoculants characterization
Phosphate solubilizing micro-organisms on acidic soils
Biochars characterizations and interaction on phosphorus release on acidic tropical soils
Research Funds Attracted as Collaborating Scientist
2022
Biochar as a soil amendment on acidic soils of Bungoma County
funded by SUN 24
Amount
USD 5,650
2009 - 2012
Rhizobial Inoculants characterization on different tropical soils in Kenya.
funded by Bill & Melinda Gates Foundation
Amount
USD 75,000
Research Funds Attracted as Principal Investigator / Co-PI
Funds Attracted for Community Development
Consultancy
Consulting Services
Publications
Peer-Reviewed Journal Articles
Peer-Reviewed Journal Articles
2025
Majengo, C. O., Mutonyi, J., Kundu, C. A., & Muyekho, F. N. (2025). Characterization of Biochar Produced from Locally Available Agricultural Waste Resources for Soil Enhancement in Western Kenya. AgroEnvironmental Sustainability, 3(2), 164-169. https://doi.org/10.59983/s2025030209
Otieno Majengo Collins, Muyekho N. Francis, Kundu A. Caroline, and Mutonyi Jonathan. (2025). “Interaction Between Biochar Sources and Phosphorus Rates on Maize Growth and Yields in Acrisols and Ferralsols of Bungoma County, Western Kenya”. International Journal of Plant & Soil Science 37 (6):63-75. https://doi.org/10.9734/ijpss/2025/v37i65487.
Mutonyi, J., Masayi, N. N., Majengo, C. O., Okello, V. S., Konje, M. M., & Makokha, J. W. (2025). Using Digital Tools to Assess Soil Variables in Selected Counties in North Rift, Kenya. AgroEnvironmental Sustainability, 3(1), 22-30. https://doi.org/10.59983/s2025030103.
2024
John Wanjala Makokha,*, Nelly Nambande Masayi, Peter Barasa , Peters Anselemo Ikoha , Martha Muthoni Konje , Jonathan Mutonyi , Victor Samuel Okello , Alice Nambiro Wechuli , Collins Otieno Majengo , Geoffrey Wanjala Khamala (2024). Assessing the Long-Term Changes in Selected Meteorological Parameters over the North-Rift, Kenya: A Regional Climatology Perspective. Hydrology 2024, Vol. 12, No. 3, pp. 59-76 https://doi.org/10.11648/j.hyd.20241203.12
2016
Collins Otieno Majengo, John Robert Okalebo & Wilson Ng’etich (2016). Evaluating the Performance of Promising Commercial Bio-Fertilizers on Soybean Production in Bungoma County, Western Kenya Using One Farm One Replicate Design. International Journal of Engineering and Mathematical Sciences 9(1) 46–55.
Books
Books
Book Chapters
Book Chapters
Conference
Conference
2022
Global Symposium on Soils for Nutrition held in Rome, Italy from 26th – 29th July 2022.
2018
Sacco Leaders Training Workshop on Corporate Finance held at Elegant Hotel Bungoma on 31st August 2018.
2017
Collins Otieno Majengo and George Tom Ekisa (2017). A comparative analysis of the effects of Private and Communal land tenure regimes on livelihoods and the environment in the Amboseli Ecosystem, Kenya. Paper that was presented at the KIBABII UNIVERSITY 2ND ANNUAL INTERDISCIPLINARY INTERNATIONAL SCIENTIFIC CONFERENCE held in KIBABII, KENYA ON 14TH – 15TH June 2017.
Sacco Leaders Training on held at Westgate Hotel Bungoma on 17th November 2017.
GIZ Food Security and Drought Resilience (Soil Fertility Component Project) Workshop on Re-Calibration of Soil Analysis data held at Le Savanna Country Lodges and Hotel, Kisumu on 15th February 2017.
2016
Collins Otieno Majengo, John Robert Okalebo, Wilson Ngetich, Margaret Mburu and Scholar Mutua. (2016). Evaluation of biological commercial inoculants on soybean production in Bungoma County, Western Kenya. Paper that was presented at the KIBABII UNIVERSITY 1ST ANNUAL INTERNATIONAL CONFERENCE held in KIBABII, KENYA ON 22nd – 25th June 2016.
Cowsignal Workshop held at Kibabii University on 15th July 2016.
2015
Pedagogy Training organized by the Faculty of Education and Social Sciences (FESS) of Kibabii University held at Kibabii University College on August 4th – 5th 2015.
2013
Collins Majengo, John Okalebo, Didier Lesueur, Pieter Pypers, Wilson Ngetich, Edwin Mutegi and Mary Musyoki. (2013). Effectiveness of Promising Commercial Biofertilizers on Soybean Production in Bungoma County, Western Kenya. Joint proceedings of the 27th Soil Science Society of East Africa and the 6th African Soil Science Society on Transforming rural livelihoods in Africa: How can land and water management contribute to enhanced food security and address climate change adaptation and mitigation? 20-25 October 2013. Nakuru, Kenya. PP 1-6
O. Majengo, J.R. Okalebo, W. Ng’etich, E. Mutegi, M.W. Mburu, M. Mutua. P. Pypers & D. Lesueur (2013). Effectiveness of Promising Commercial Biofertilizers on Soybean Production in Bungoma County, Western Kenya. AFRICAN CROP SCIENCE CONFERENCE PROCEEDINGS, VOL. 11. PP. 827 – 830.
Majengo C.O. (2013). Effectiveness of Promising Commercial Biofertilizers on Soybean Production in Bungoma County, Western Kenya. MSc Thesis, University of Eldoret, Eldoret, Kenya.
2012
Collins Majengo, John Okalebo, Didier Lesueur, Pieter Pypers, Wilson Ngetich, Edwin Mutegi and Mary Musyoki. (2012). Effectiveness of Promising Commercial Biofertilizers on Soybean Production in Bungoma County, Western Kenya. Paper that was presented at the 1st INTERNATIONAL CONFERENCE ON INTERGRATED SOIL FERTILITY MANAGEMENT (ISFM) held in NAIROBI KENYA ON 22nd – 26th October 2012
Research proposal writing training workshop organized by Kenya DAAD Scholars Association in collaboration with German Academic Exchange Service (DAAD) and National Council of Science and Technology (NCST) at Moi University, Eldoret on July 25th – 27th 2012.
2011
Laetitia Herrmann, Collins Majengo, Edwin Mutegi, Martin Kimanthi, Paul Onyango, Robert Okalebo & Didier Lesueur. (2011). Field evaluation of rhizobial inoculant: high nodule occupancy by the inoculated strain doesn’t lead to improved soybean yields in Kenya”. Paper that was presented at the 17th International Congress on Nitrogen Fixation FREMANTLE, WESTERN AUSTRALIA on 27 November – 1 December 2011
Collins Majengo, John Okalebo, Didier Lesueur, Pieter Pypers, Wilson Ngetich, Edwin Mutegi and Mary Musyoki. (2011). Optimal soil nitrogen and phosphorus for commercial bio-fertilizer effectiveness on soybean production in Bungoma, Kenya. Paper that was presented at the 26th SOIL SCIENCE SOCIETY OF EAST AFRICA CONFERENCE held in JINJA, UGANDA ON 21st – 24th November 2011.
Jefwa, J., Asrat, A., Hermann, L., Jemo, M., Kavoo, A., Lesueur, D., Majengo, C., Mucheru, M., Mukhongo, R., Mulet, F., Munyahali, W., Mutegi, E., Mwangi, E., Ncho, C., Nwoke, O.C., Okalebo, R., Pypers, P., Were, B., and Yusuf, A. (2011). Do commercial biological and chemical products increase crop yields and economic returns under smallholder farmer conditions? Paper that was presented at CIALCA CONFERENCE held in KIGALI, October 2011.
Ndung’u-Magiroi, K.W, Faye A., Pypers P., Herrmann L., Mutegi E.M., Okalebo J.R., Othieno C.O., Majengo C. and Lesueur D. (2011). Co-inoculation effects of commercial bio inoculants with differing plant growth promotion abilities on soybean production in Kenya. A poster that was presented at RHIZOSPHERE 3 CONFERENCE held in PERTH, AUSTRALIA, Sept 2011
Musyoki, M.; Majengo, C.; Mutegi, E.; Thonar, C.; Faye, A.; Okalebo, R; Thuita, M; Lesueur, D. and Pypers, P. (2011). Increased soybean production through rhizobial inoculation under smallholder conditions in distinct agro-ecological zones of Kenya. A paper that was presented at N2 CONFERENCE in SCOTLAND, Sept 2011
SAS Data analytical software training organized by the Tropical Soil Biology and Fertility Institute of International Centre for Tropical Agriculture (TSBF-CIAT) held at ICRAF Nairobi on July 15th – 17th 2011.
O. Majengo, J.R. Okalebo, P. Pypers, W. Ng’etich, E. Mutegi, M.W. Mburu & M. Musyoki. (2011). Interactions between nitrogen and phosphorus microbial inoculants on soybean production in Bungoma, Kenya. AFRICAN CROP SCIENCE CONFERENCE PROCEEDINGS, VOL. 10. PP. 121 – 123.
W. Mburu, J.R. Okalebo, D. Lesueur, P. Pypers, W. Ng’etich, E. Mutegi, S. Mutua, C. Majengo, R. Njoroge & O.A. Nekesa (2011). Evaluation of biological commercial inoculants on soybean production in Bungoma County, Kenya. AFRICAN CROP SCIENCE CONFERENCE PROCEEDINGS, VOL. 10. PP. 605 – 610.
2010
Majengo, C, Okalebo, J.R, Ngetich, W. & Othieno, C.O. (2010). Farmer – managed trials for evaluation of Rhizatech and Legumefix in Bungoma district Kenya. In: Adipala, E., Tusiime, G. and Majaliwa Mwanjololo, J.G. (Eds.). Proceedings of the Second RUFORUM Biennial Regional Conference on Building Capacity for Food Security in Africa, held 20 – 24 September 2010, Entebbe, Uganda. RUFORUM Working Document Series No. 5.
Learning Modules
Innovations, Prototypes & Commercialization
.