Sunday E. Obalum

University of Nigeria

Publishing since 2010, latest 2026

Soil Science
Plant Science
Civil and Structural Engineering
Agronomy and Crop Science
Management, Monitoring, Policy and Law
Biomaterials

Publications: 702010–2026
Citations: 1,265to those papers
h-index: 18i10-index 36
Field-weighted impact: 1.371.00 is the world average
World top 10%: 10%7 of 70 scored papers
Open access: 63%44 papers free to read

8 other works — preprints, datasets and the like — are listed but not counted.

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Career

On their papers

Every institution they have given on a paper.

Publications

70 in all

Combining biochar, nitrogen fertilizer and no-tillage to reduce greenhouse gas emissions and increase rice yield in rainfed lowland
2026Journal of Agriculture and Food ResearchJournalOpen access3 citations10.1016/j.jafr.2026.102700
Partial Substitution of Coarse-Textured Topsoil in Composted Poultry Manure-Based Media with Composted Rice Husk and Responses of Two Daucus carota Varieties

Download CV:PDFWord

Citations received each year

Peerford

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Soil Science4869%
Plant Science2130%
Civil and Structural Engineering1420%
Agronomy and Crop Science1014%
Management, Monitoring, Policy and Law710%
Biomaterials57%
Environmental Chemistry57%
Environmental Engineering57%
Geochemistry and Petrology57%
Global and Planetary Change57%

Life Sciences
Physical Sciences

Topics most written on

Soil Carbon and Nitrogen Dynamics32
Soil erosion and sediment transport17
Rice Cultivation and Yield Improvement13
Soil and Unsaturated Flow11
Soil Management and Crop Yield10
Agronomic Practices and Intercropping Systems8
Agricultural Science and Fertilization7
Clay minerals and soil interactions5
Irrigation Practices and Water Management5
Soil and Land Suitability Analysis4
Soil and Water Nutrient Dynamics4
Geotechnical and construction materials studies3

Who they write with

Their most frequent co-authors, and the papers those co-authors share

Where their co-authors are

57% of their papers have a co-author abroad

papers co-written1234567Home

Most frequent partner countries

Japan24
Germany6
Ghana5
Côte d’Ivoire3
United States3
Mali3
Cameroon3
Brazil2

Papers with at least one author in that country.

Institutions written with most

Kindai UniversityJP17 papers
Kogi State UniversityNG11 papers
Michael Okpara University of AgricultureNG10 papers
Federal College of Agrioculture IshiaguNG7 papers
Hokkaido UniversityJP5 papers
Shimane UniversityJP4 papers
University of CalabarNG4 papers
Council for Scientific and Industrial ResearchGH4 papers
Johann Heinrich von Thünen-InstitutDE3 papers
Institut d'Économie RuraleML3 papers

Where they publish

Archives of Agronomy and Soil Science3
Environmental Monitoring and Assessment3
Nigerian Journal of Soil Science3
Sains Tanah - Journal of Soil Science and Agroclimatology3
AgroEnvironmental Sustainability2
Agroindustrial science2

Development goals addressed

From each paper’s title and abstract

15Life on land27
2Zero hunger16
6Clean water and sanitation5
10Reduced inequalities1
12Responsible consumption and production1
16Peace, justice and strong institutions1

Most cited

Soil organic matter as sole indicator of soil degradation
Environmental Monitoring and Assessment2
2017290 citationsWorld top 10%
Soil Degradation-Induced Decline in Productivity of Sub-Saharan African Soils: The Prospects of Looking Downwards the Lowlands with theSawahEcotechnology
Applied and Environmental Soil Science2
2012106 citationsWorld top 10%Open access · Gold

Natural and Life Sciences Communications

Synergistic effects of cattle dung, urea and lime on agronomic productivity and physicochemical properties of coarse-textured tropical soils

2025Journal of Agriculture and Environment for International Development (JAEID)JournalOpen access2 citations10.36253/jaeid-16190

Differing effects of grass and polythene mulches on sweet potato productivity in derived savannah agro-ecology

2025International Journal of Horticultural ScienceJournalOpen accessSenior author0 citations10.31421/ijhs/31/2025/14238

An overview of uncertainties in evapotranspiration estimation techniques

2023Journal of AgrometeorologyJournalOpen accessSenior author16 citations10.54386/jam.v25i1.2014

Substitution of manure source and aerator in nursery media on sandy loam topsoil and their fertility indices 4 months after formulation

2018International Journal Of Recycling of Organic Waste in AgricultureJournalOpen accessCorresponding13 citations10.1007/s40093-018-0216-8

Soil organic matter as sole indicator of soil degradation

2017Environmental Monitoring and AssessmentJournalFirst authorCorresponding290 citations10.1007/s10661-017-5881-y

Communications in Soil Science and Plant Analysis

DOAJ (DOAJ: Directory of Open Access Journals)2

How it can be read

63% free to read

Diamond 17 · 24%Free to read and to publish
Gold 15 · 21%In an open-access journal
Hybrid 3 · 4%Open in a subscription journal
Bronze 6 · 9%Free to read, no open licence
Green 3 · 4%A copy in a repository
Closed 26 · 37%Behind a paywall

Who funds it

23 of 70 papers name a funder

Japan Society for the Promotion of Science9
Ministry of Education, Culture, Sports, Science and Technology5
University Of Nigeria Nsukka5
West African Science Service Centre on Climate Change and Adapted Land Use2
Association of African Universities1
Hokkaido University1
International Business Machines Corporation1
Kindai University1

201076 citationsWorld top 10%