John Ojiem

665 total citations
24 papers, 404 citations indexed

About

John Ojiem is a scholar working on Plant Science, Agronomy and Crop Science and Soil Science. According to data from OpenAlex, John Ojiem has authored 24 papers receiving a total of 404 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Plant Science, 12 papers in Agronomy and Crop Science and 6 papers in Soil Science. Recurrent topics in John Ojiem's work include Agronomic Practices and Intercropping Systems (12 papers), Agricultural pest management studies (7 papers) and Soil Carbon and Nitrogen Dynamics (5 papers). John Ojiem is often cited by papers focused on Agronomic Practices and Intercropping Systems (12 papers), Agricultural pest management studies (7 papers) and Soil Carbon and Nitrogen Dynamics (5 papers). John Ojiem collaborates with scholars based in Kenya, United States and Netherlands. John Ojiem's co-authors include K.E. Giller, Bernard Vanlauwe, N. de Ridder, Nico de Ridder, A.C. Franke, Steven J. Fonte, Steven J. Vanek, Martins Odendo, A. Bationo and J.G. Mureithi and has published in prestigious journals such as Soil Science Society of America Journal, Plant and Soil and Frontiers in Plant Science.

In The Last Decade

John Ojiem

21 papers receiving 371 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
John Ojiem Kenya	7	204	194	142	108	80	24	404
Frederick Baijukya Tanzania	14	287 1.4×	214 1.1×	112 0.8×	142 1.3×	65 0.8×	41	542
Tarirai Muoni Sweden	11	147 0.7×	161 0.8×	117 0.8×	105 1.0×	78 1.0×	20	318
Adama Coulibaly Mali	8	166 0.8×	130 0.7×	114 0.8×	137 1.3×	78 1.0×	14	380
Esther Nyaradzo Masvaya Zimbabwe	9	140 0.7×	182 0.9×	119 0.8×	166 1.5×	99 1.2×	14	377
Nester Mashingaidze South Africa	9	170 0.8×	190 1.0×	161 1.1×	122 1.1×	132 1.6×	20	415
B.C.G. Kamanga Malawi	10	147 0.7×	155 0.8×	190 1.3×	69 0.6×	86 1.1×	16	364
F.H. D'Emden Australia	4	152 0.7×	98 0.5×	164 1.2×	83 0.8×	47 0.6×	7	353
Mary Ollenburger United States	7	141 0.7×	172 0.9×	106 0.7×	100 0.9×	81 1.0×	10	389
E. N. O. Iwuafor Nigeria	12	311 1.5×	261 1.3×	77 0.5×	262 2.4×	75 0.9×	26	534
Siyabusa Mkuhlani South Africa	11	147 0.7×	110 0.6×	93 0.7×	88 0.8×	145 1.8×	20	381

Countries citing papers authored by John Ojiem

Since Specialization

Citations

This map shows the geographic impact of John Ojiem's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John Ojiem with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John Ojiem more than expected).

Fields of papers citing papers by John Ojiem

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John Ojiem. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John Ojiem. The network helps show where John Ojiem may publish in the future.

Co-authorship network of co-authors of John Ojiem

This figure shows the co-authorship network connecting the top 25 collaborators of John Ojiem. A scholar is included among the top collaborators of John Ojiem based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with John Ojiem. John Ojiem is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Vanek, Steven J., et al.. (2025). Long‐term cropping system and manure effects on soil health parameters and associated soil‐borne pathogens. Soil Science Society of America Journal. 89(3).

Vanek, Steven J., et al.. (2024). Long-term organic matter inputs enhance soil health and reduce soil-borne pathogen pressure in maize-bean rotations in Kenya. Agriculture Ecosystems & Environment. 380. 109402–109402. 4 indexed citations

Otieno, David Jakinda, et al.. (2024). Do food security indicators vary between male and female-headed households? Evidence from legume farmers in Western Kenya. Frontiers in Sustainable Food Systems. 7. 1 indexed citations

Stewart, Jane E., et al.. (2024). Assessing performance of simplified bioassays for soil-borne pathogens in smallholder systems of western Kenya. Frontiers in Plant Science. 15. 1389285–1389285. 3 indexed citations

Vanek, Steven J., et al.. (2023). Evaluating nutrient balances, soil carbon trends, and management options to support long-term soil productivity in smallholder crop-livestock systems. Nutrient Cycling in Agroecosystems. 127(3). 409–427. 5 indexed citations

Vanek, Steven J., et al.. (2022). Examining the contributions of maize shoots, roots, and manure to stable soil organic carbon pools in tropical smallholder farming soils. Geoderma. 425. 116049–116049. 6 indexed citations

Gachuiri, C.K., et al.. (2021). Quality of lablab (Lablab purpureus) forage preserved as hay or silage. Indian Journal of Animal Nutrition. 38(2). 127–133.

Vanek, Steven J., et al.. (2021). Organic Nutrient Source Allocation and Use in Smallholder Farming Communities: What Are We Missing?. Frontiers in Sustainable Food Systems. 5. 6 indexed citations

Muthomi, James W., et al.. (2019). Effect of Legume Extracts on Germination, Seedling Health of Beans (Phaseolus vulgaris L.) and Soil Microorganisms. International Journal of Plant & Soil Science. 1–13. 3 indexed citations

10.

Ojiem, John, et al.. (2019). Multiple-bean varieties as a strategy for minimizing production risk and enhancing yield stability in smallholder systems. Experimental Agriculture. 56(1). 37–47. 2 indexed citations

11.

Kunyanga, Catherine Nkirote, et al.. (2019). Assessing Sensory Characteristics and Consumer Preference of Legume-Cereal-Root Based Porridges in Nandi County. Journal of Food Quality. 2019. 1–7. 6 indexed citations

12.

Muthomi, James W., Idah Mugambi, John Ojiem, George N. Chemining’wa, & JH Nderitu. (2014). Effect of incorporating lablab biomass in soils on root rot disease complex and yield of beans intercropped with maize. University of Nairobi Research Archive (University of Nairobi). 4(12). 515–524. 2 indexed citations

13.

Ojiem, John, Bernard Vanlauwe, Nico de Ridder, & K.E. Giller. (2007). Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms. Plant and Soil. 292(1-2). 119–135. 94 indexed citations

14.

Ojiem, John, N. de Ridder, Bernard Vanlauwe, & K.E. Giller. (2006). Socio-ecological niche: a conceptual framework for integration of legumes in smallholder farming systems. International Journal of Agricultural Sustainability. 4(1). 79–93. 115 indexed citations

15.

Odendo, Martins, et al.. (2006). On-farm evaluation and scaling-up of soil fertility management technologies in western Kenya. Nutrient Cycling in Agroecosystems. 76(2-3). 369–381. 30 indexed citations

16.

Mureithi, J.G., Charles K. K. Gachene, & John Ojiem. (2003). THE ROLE OF GREEN MANURE LEGUMES IN SMALLHOLDER FARMING SYSTEMS IN KENYA: The Legume Research Network Project. Tropical and Subtropical Agroecosystems. 1. 57–70. 19 indexed citations

17.

Mureithi, J.G., et al.. (2002). The role of green manure legumes in smallholders farming systems in Kenya. 1 indexed citations

18.

Mureithi, J.G., et al.. (2000). Soil fertility management handbook for extension staff and farmers in Kenya. 6 indexed citations

19.

Ojiem, John, et al.. (1999). Agronomic and chemical characterization of potential green manure species in western Kenya. 3 indexed citations

20.

Ojiem, John & Martins Odendo. (1997). Farmers' perception of spatial heterogeneity and it's influence on soil management in small-scale farms in western Kenya. 3(1). 283–287. 3 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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