Richard N. Onwonga (PhD)

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Dr. J.J. LELEIDEPARTMENT OF CROPS HORTICULTURE SOILS EGERTON UNIVERSITYVerified email at egerton.ac.ke
George N KarukuProfessor of Agro-Environmental Soil PhysicsVerified email at uonbi.ac.ke
Cecilia Moraa OnyangoDepartment of Plant Science and Crop Protection, University of NairobiVerified email at uonbi.ac.ke
vincent Mbindo KathumoResearcherVerified email at uonbi.ac.ke
George N. Chemining'waProfessor of Agronomy (UoN), Turkana University CollegeVerified email at tuc.ac.ke
Templer NoelInternational Maize and Wheat Improvement Centre (CIMMYT)Verified email at cgiar.org
Prof. John MburuDepartment of Agricultural Economics, University of NairobiVerified email at uonbi.ac.ke
Prof. Oliver V. Wasonga (www.oliverw...Assocaite Professor, Dryland Ecology & Climate Change AdaptationVerified email at uonbi.ac.ke
Mwangi James KinyanjuiKaratina universityVerified email at karu.ac.ke
Geoffrey KironchiProfessor of Soil Science, University of nairobiVerified email at uonbi.ac.ke
Dr. Stephen M MureithiSenior Lecturer, Department of Land Resource Management and Agricultural Technology, University ofVerified email at uonbi.ac.ke
Nancy Njarua KaranjaProfessor of Soil EcologyVerified email at uonbi.ac.ke
Prof. Solomon ShibairoProfessor of Horticulture, Masinde Muliro University of Science and TechnologyVerified email at mmust.ac.ke
Nictor NamoiUniversity of Illinois Urbana-ChampaignVerified email at illinois.edu
Rolf SommerWWF GermanyVerified email at wwf.de
Lorenz ProbstInstitute for Development Research, University of Natural Resources and Life SciencesVerified email at boku.ac.at
KALLUNDE PILLY SIBUGAProfessor of Weed Science and Agronomy, Department of Crop Science and Production, SokoineVerified email at suanet.ac.tz
Dr. Collins Oduor OndiekUnited States International University-AfricaVerified email at usiu.ac.ke
David E. PelsterAgriculture and Agri-Food CanadaVerified email at canada.ca
Raphael WahomeProfessor of livestock production systems, university of NairobiVerified email at uonbi.ac.ke

Richard N. Onwonga (PhD)

Department of Land Resource Management and Agricultural Technology, University of Nairobi

Verified email at uonbi.ac.ke - Homepage

Nutrient cycling Soil Agroecology Organic Agriculture Biophysical Modelling


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Mineral nitrogen and microbial biomass dynamics under different acid soil management practices for maize production RN Onwonga, JJ Lelei, BB Mochoge Journal of Agricultural Science 2 (1), 16, 2010	64	2010
A transformative university learning experience contributes to sustainability attitudes, skills and agency L Probst, L Bardach, D Kamusingize, N Templer, H Ogwali, A Owamani, ... Journal of Cleaner Production 232, 648-656, 2019	61	2019
Index-based agricultural insurance products: challenges, opportunities and prospects for uptake in sub-Sahara Africa N Ntukamazina, RN Onwonga, R Sommer, JC Rubyogo, CM Mukankusi, ... Kassel University Press, 2017	56	2017
Enhancing soil organic carbon, particulate organic carbon and microbial biomass in semi-arid rangeland using pasture enclosures CO Oduor, NK Karanja, RN Onwonga, SM Mureithi, D Pelster, G Nyberg BMC ecology 18, 1-9, 2018	55	2018
Low cost technologies for enhancing N and P availability and maize (Zea mays L.) performance on acid soils RN Onwonga, JJ Lelei, B Freyer, JK Friedel, SM Mwonga, P Wandhawa World Journal of Agricultural Sciences 4 (5), 862-873, 2008	53	2008
Assessment of Mangrove Cover Change and Biomass in Mida Creek, Kenya FA Onwonga Richard, Kinyanjui Mwangi James, Oliver Wasonga Open Journal of Forestry 4 (4), 398-413., 2014	46*	2014
Carbon stocks and stock changes in agroforestry practices: a review H Agevi, R Onwonga, S Kuyah, M Tsingalia Tropical and Subtropical Agroecosystems, 2017	44	2017
Climate change effects on crop production in Yatta sub-county: farmer perceptions and adaptation strategies BL Agesa, CM Onyango, VM Kathumo, RN Onwonga, GN Karuku African Journal of Food, Agriculture, Nutrition and Development 19 (1 …, 2019	42	2019
Organic based nutrient management strategies: effect on soil nutrient availability and maize (Zea mays L.) performance in Njoro, Kenya JJ Lelei, RN Onwonga, B Freyer African Journal of Agricultural Research 4 (2), 92-99, 2009	41	2009
Variation of nutritional and anti-nutritional contents in finger millet (Eleusine coracana (L.) Gaertn) genotypes J Ambuko, R Onwonga, O Nyongesa, SI Shibairo University of Nairobi, 2014	40	2014
Effect of inorganic and organic fertilizers on the performance and profitability of grain amaranth (Amaranthus caudatus L.) in Western Kenya RO Nyankanga, RN Onwonga, FS Wekesa, D Nakimbugwe, D Masinde, ... Journal of agricultural science 4 (1), 223, 2012	40	2012
Evaluation of types and factors influencing adoption of rainwater harvesting techniques in Yatta district, Kenya RN Onwonga, DM Mburu, YA Elhadi University of Nairobi, 2013	36	2013
Effect of excessive and minimal soil moisture stress on agronomic performance of bush and climbing bean (Phaseolus vulgaris L.) N Ntukamazina, RN Onwonga, R Sommer, CM Mukankusi, J Mburu, ... Cogent Food & Agriculture 3 (1), 1373414, 2017	35	2017
Climate change and variability: Farmers’ perception, experience and adaptation strategies in Makueni County, Kenya KT Kitinya, RN Onwonga, C Onyango, JP Mbuvi, G Kironchi Asian Journal of Agriculture and Rural Development 2 (3), 411-421, 2012	28	2012
Comparative effects of soil amendments on phosphorus use and agronomic efficiencies of two maize hybrids in acidic soils of Molo County, Kenya RN Onwonga, JJ Lelei, JK Macharia American Journal of Experimental Agriculture 3 (4), 939-958, 2013	27	2013
Use of Dolichos (Lablab Purpureus L.) and combined fertilizers enhance soil nutrient availability, and maize (Zea Mays L.) yield in farming systems of Kabete Sub County Kenya RC Sitienei, RN Onwonga, JJ Lelei, P Kamoni Agricultural Science Research Journal 7 (2), 47-61, 2017	26	2017
Effect of nitrogen source, crop maturity stage and storage conditions on phenolics and oxalate contents in vegetable amaranth (Amaranthus hypochondriacus) CM Onyango, J Harbinson, JK Imungi, RN Onwonga, O van Kooten Journal of Agricultural Science 4 (7), 219-230, 2012	23	2012
Impact of traditional farming practices on nutrient balances in smallholder farming systems of Nakuru District, Kenya R Onwonga, B Freyer Proceedings of the Tropentag conference October, 11-13, 2006	23	2006
The influence of organic and inorganic nutrient inputs on soil organic carbon functional groups content and maize yields M Ndung'u, LW Ngatia, RN Onwonga, MW Mucheru-Muna, R Fu, ... Heliyon 7 (8), 2021	22	2021
Does certified organic agriculture increase agroecosystem health? Evidence from four farming systems in Uganda N Templer, M Hauser, A Owamani, D Kamusingize, H Ogwali, L Mulumba, ... International Journal of Agricultural Sustainability 16 (2), 150-166, 2018	22	2018

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