Stephen Akpa

505 total citations
8 papers, 355 citations indexed

About

Stephen Akpa is a scholar working on Environmental Engineering, Soil Science and Civil and Structural Engineering. According to data from OpenAlex, Stephen Akpa has authored 8 papers receiving a total of 355 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Environmental Engineering, 5 papers in Soil Science and 2 papers in Civil and Structural Engineering. Recurrent topics in Stephen Akpa's work include Soil Carbon and Nitrogen Dynamics (4 papers), Soil Geostatistics and Mapping (4 papers) and Soil and Unsaturated Flow (2 papers). Stephen Akpa is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (4 papers), Soil Geostatistics and Mapping (4 papers) and Soil and Unsaturated Flow (2 papers). Stephen Akpa collaborates with scholars based in Australia, Nigeria and United States. Stephen Akpa's co-authors include Thomas F. A. Bishop, Inakwu Odeh, Alfred E. Hartemink, Sabastine U. Ugbaje, Eileen M. Perry, Robert L. Clark, Yassine Bouslıhım, Alex B. McBratney, Budiman Minasny and Alexandre M.J.‐C. Wadoux and has published in prestigious journals such as Soil Science Society of America Journal, Geoderma and Remote Sensing.

In The Last Decade

Stephen Akpa

8 papers receiving 351 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Stephen Akpa Australia	6	239	194	93	83	59	8	355
Marcos E. Angelini Argentina	9	225 0.9×	181 0.9×	68 0.7×	65 0.8×	57 1.0×	15	371
P. Kamoni Kenya	10	158 0.7×	235 1.2×	86 0.9×	38 0.5×	54 0.9×	15	387
Maria Fantappiè Italy	8	245 1.0×	240 1.2×	125 1.3×	39 0.5×	66 1.1×	23	435
Justin George Kalambukattu India	8	160 0.7×	207 1.1×	82 0.9×	53 0.6×	69 1.2×	23	316
Sayed Fakhreddin Afzali Iran	9	158 0.7×	165 0.9×	84 0.9×	47 0.6×	72 1.2×	22	383
Zhongqi Zhang China	12	199 0.8×	161 0.8×	130 1.4×	26 0.3×	50 0.8×	26	360
Isa Esfandiarpoor Borujeni Iran	7	217 0.9×	92 0.5×	71 0.8×	52 0.6×	104 1.8×	8	320
P. A.L. le Roux South Africa	12	117 0.5×	180 0.9×	46 0.5×	80 1.0×	70 1.2×	33	307
Mohammad Reza Pahlavan-Rad Iran	8	259 1.1×	199 1.0×	72 0.8×	78 0.9×	97 1.6×	15	407
Giovanni L’Abate Italy	10	120 0.5×	186 1.0×	73 0.8×	33 0.4×	69 1.2×	20	373

Countries citing papers authored by Stephen Akpa

Since Specialization

Citations

This map shows the geographic impact of Stephen Akpa'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 Stephen Akpa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Stephen Akpa more than expected).

Fields of papers citing papers by Stephen Akpa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Stephen Akpa. 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 Stephen Akpa. The network helps show where Stephen Akpa may publish in the future.

Co-authorship network of co-authors of Stephen Akpa

This figure shows the co-authorship network connecting the top 25 collaborators of Stephen Akpa. A scholar is included among the top collaborators of Stephen Akpa 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 Stephen Akpa. Stephen Akpa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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8 of 8 papers shown

1.

Wadoux, Alexandre M.J.‐C., Budiman Minasny, Francis B.T. Silatsa, et al.. (2024). Applications and challenges of digital soil mapping in Africa. Geoderma. 449. 117007–117007. 19 indexed citations

2.

Akpa, Stephen, et al.. (2024). Enhancing maize (Zea mays L.) yields in limited fertilizer farming systems through soil nutrient recycling in Sub-Saharan Africa. Organic Agriculture. 14(3). 409–425. 1 indexed citations

3.

Bishop, Thomas F. A., et al.. (2024). Patterns of Urban Sprawl and Agricultural Land Loss in Sub-Saharan Africa: The Cases of the Ugandan Cities of Kampala and Mbarara. Land. 13(7). 1056–1056. 10 indexed citations

4.

Perry, Eileen M., et al.. (2022). Spatial and Temporal Biomass and Growth for Grain Crops Using NDVI Time Series. Remote Sensing. 14(13). 3071–3071. 25 indexed citations

5.

Akpa, Stephen, Sabastine U. Ugbaje, Thomas F. A. Bishop, & Inakwu Odeh. (2016). Enhancing pedotransfer functions with environmental data for estimating bulk density and effective cation exchange capacity in a data‐sparse situation. Soil Use and Management. 32(4). 644–658. 24 indexed citations

6.

Akpa, Stephen, et al.. (2016). Total soil organic carbon and carbon sequestration potential in Nigeria. Geoderma. 271. 202–215. 156 indexed citations

7.

Akpa, Stephen, Inakwu Odeh, Thomas F. A. Bishop, & Alfred E. Hartemink. (2014). Digital Mapping of Soil Particle‐Size Fractions for Nigeria. Soil Science Society of America Journal. 78(6). 1953–1966. 118 indexed citations

8.

Akpa, Stephen & John O. Agbenin. (2012). Impact of Cow Dung Manure on the Solubility of Copper, Lead, and Zinc in Urban Garden Soils from Northern Nigeria. Communications in Soil Science and Plant Analysis. 43(21). 2789–2800. 2 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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