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University · Bo · Sierra Leone

Njala University

In research, Njala University stands highest in Life Sciences (#2,735 of 6,403 worldwide), Physical Sciences (#7,169 of 10,670 worldwide) and Social Sciences (#6,712 of 9,585 worldwide), 2022-now.

njala.edu.slROR OpenAlex
World rank, 2022-now
#5,643
of 22,385 · #10,214 all time
Rank in Sierra Leone
#2
of 4
Research works
771
▲ 162% vs 2018-21
Citations
5k
6.4 per fractional work
Top-10% rate
7.6%
all institutions 10.0%
vs its own fields
1.04×
1.00× is exactly expected
Open access
74%
world 40%
International
34%
world 18%
Njala University

What is Njala University known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Life SciencesDomain #2,735 of 6,403 5.7%78 #5010
Physical SciencesDomain #7,169 of 10,670 8.1%83 #12848
Social SciencesDomain #6,712 of 9,585 5.0%89 #11311
Agricultural and Biological SciencesField #2,300 of 3,157 3.9%67 #3393

Each strip is that field's whole ranked pool, with the notch where Njala University sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022-now. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Life Sciences#5,010 #2,735
  2. Physical Sciences#12,848 #7,169
  3. Social Sciences#11,311 #6,712
  4. Agricultural and Biological Sciences#3,393 #2,300
all time2022-now, better2022-now, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

Which fields of science does Njala University work in?

In 2022-now, 30% of research at Njala University is in Physical Sciences, 27% in Social Sciences. Its largest fields are Agricultural and Biological Sciences (21%), Social Sciences (15%), Medicine (12%). It does 1.8× the world's share of Life Sciences.

Physical Sciences: 115 fractional works · 30.4% of its workEngineering: 45 fractional works · 11.9% of its workElectrical and Electronic Engineering: 11 fractional works · 2.9% of its workCivil and Structural Engineering: 10 fractional works · 2.6% of its workBuilding and Construction: 8 fractional works · 2.1% of its workMechanical Engineering: 5 fractional works · 1.4% of its workControl and Systems Engineering: 3 fractional works · 0.8% of its workBiomedical Engineering: 2 fractional works · 0.5% of its workAerospace Engineering: 2 fractional works · 0.5% of its workMechanics of Materials: 1 fractional works · 0.3% of its workMedia Technology: 1 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.6% of its workEnvironmental Science: 35 fractional works · 9.4% of its workGlobal and Planetary Change: 8 fractional works · 2.1% of its workManagement, Monitoring, Policy and Law: 6 fractional works · 1.6% of its workEcology: 5 fractional works · 1.3% of its workWater Science and Technology: 4 fractional works · 1.1% of its workPollution: 4 fractional works · 1.1% of its workEnvironmental Engineering: 3 fractional works · 0.8% of its workNature and Landscape Conservation: 2 fractional works · 0.4% of its workIndustrial and Manufacturing Engineering: 1 fractional works · 0.4% of its workHealth, Toxicology and Mutagenesis: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.2% of its workComputer Science: 19 fractional works · 5.0% of its workInformation Systems: 10 fractional works · 2.5% of its workArtificial Intelligence: 4 fractional works · 1.0% of its workComputer Science Applications: 1 fractional works · 0.4% of its workComputer Networks and Communications: 1 fractional works · 0.3% of its workSignal Processing: 1 fractional works · 0.3% of its workComputational Theory and Mathematics: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workMaterials Science: 7 fractional works · 1.8% of its workMaterials Chemistry: 2 fractional works · 0.5% of its workPolymers and Plastics: 1 fractional works · 0.4% of its workBiomaterials: 1 fractional works · 0.3% of its workGeneral Materials Science: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.3% of its workMathematics: 4 fractional works · 1.0% of its workModeling and Simulation: 2 fractional works · 0.5% of its workGeometry and Topology: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.3% of its workEarth and Planetary Sciences: 3 fractional works · 0.7% of its workGeochemistry and Petrology: 1 fractional works · 0.3% of its workAtmospheric Science: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.3% of its workEnergy: 1 fractional works · 0.3% of its workChemistry: 1 fractional works · 0.2% of its workChemical Engineering: 0 fractional works · 0.1% of its workPhysics and Astronomy: 0 fractional works · 0.0% of its workSocial Sciences: 103 fractional works · 27.3% of its workSocial Sciences: 58 fractional works · 15.4% of its workEducation: 23 fractional works · 6.2% of its workSociology and Political Science: 12 fractional works · 3.2% of its workPolitical Science and International Relations: 5 fractional works · 1.3% of its workSafety Research: 4 fractional works · 0.9% of its workAnthropology: 3 fractional works · 0.8% of its workUrban Studies: 2 fractional works · 0.6% of its workHealth: 2 fractional works · 0.4% of its workLaw: 2 fractional works · 0.4% of its workGender Studies: 1 fractional works · 0.3% of its workDemography: 1 fractional works · 0.2% of its workGeography, Planning and Development: 1 fractional works · 0.2% of its workSmaller subfields together: 2 fractional works · 0.6% of its workBusiness, Management and Accounting: 15 fractional works · 3.9% of its workStrategy and Management: 4 fractional works · 1.2% of its workAccounting: 3 fractional works · 0.9% of its workManagement Information Systems: 3 fractional works · 0.7% of its workOrganizational Behavior and Human Resource Management: 2 fractional works · 0.6% of its workManagement of Technology and Innovation: 2 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.1% of its workEconomics, Econometrics and Finance: 15 fractional works · 3.9% of its workEconomics and Econometrics: 11 fractional works · 2.8% of its workFinance: 3 fractional works · 0.8% of its workGeneral Economics, Econometrics and Finance: 1 fractional works · 0.3% of its workPsychology: 10 fractional works · 2.7% of its workSocial Psychology: 4 fractional works · 1.2% of its workClinical Psychology: 3 fractional works · 0.7% of its workExperimental and Cognitive Psychology: 1 fractional works · 0.3% of its workDevelopmental and Educational Psychology: 1 fractional works · 0.2% of its workApplied Psychology: 1 fractional works · 0.2% of its workArts and Humanities: 3 fractional works · 0.8% of its workDecision Sciences: 3 fractional works · 0.7% of its workManagement Science and Operations Research: 2 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.1% of its workLife Sciences: 90 fractional works · 24.0% of its workAgricultural and Biological Sciences: 78 fractional works · 20.6% of its workPlant Science: 30 fractional works · 8.0% of its workEcology, Evolution, Behavior and Systematics: 12 fractional works · 3.2% of its workFood Science: 7 fractional works · 1.8% of its workGeneral Agricultural and Biological Sciences: 6 fractional works · 1.6% of its workAnimal Science and Zoology: 5 fractional works · 1.4% of its workSoil Science: 4 fractional works · 1.2% of its workAgronomy and Crop Science: 4 fractional works · 1.1% of its workForestry: 4 fractional works · 1.1% of its workInsect Science: 3 fractional works · 0.7% of its workHorticulture: 1 fractional works · 0.3% of its workAquatic Science: 1 fractional works · 0.2% of its workImmunology and Microbiology: 6 fractional works · 1.6% of its workVirology: 3 fractional works · 0.8% of its workParasitology: 1 fractional works · 0.3% of its workImmunology: 1 fractional works · 0.3% of its workApplied Microbiology and Biotechnology: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workBiochemistry, Genetics and Molecular Biology: 6 fractional works · 1.6% of its workMolecular Biology: 3 fractional works · 0.7% of its workGenetics: 2 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.3% of its workPharmacology, Toxicology and Pharmaceutics: 1 fractional works · 0.2% of its workNeuroscience: 0 fractional works · 0.1% of its workHealth Sciences: 69 fractional works · 18.2% of its workMedicine: 47 fractional works · 12.4% of its workPublic Health, Environmental and Occupational Health: 14 fractional works · 3.6% of its workInfectious Diseases: 9 fractional works · 2.4% of its workPediatrics, Perinatology and Child Health: 6 fractional works · 1.5% of its workEpidemiology: 5 fractional works · 1.3% of its workObstetrics and Gynecology: 2 fractional works · 0.5% of its workComplementary and alternative medicine: 2 fractional works · 0.4% of its workRadiology, Nuclear Medicine and Imaging: 1 fractional works · 0.4% of its workCardiology and Cardiovascular Medicine: 1 fractional works · 0.3% of its workHematology: 1 fractional works · 0.2% of its workSmaller subfields together: 6 fractional works · 1.7% of its workHealth Professions: 12 fractional works · 3.3% of its workGeneral Health Professions: 8 fractional works · 2.0% of its workHealth Information Management: 1 fractional works · 0.3% of its workEmergency Medical Services: 1 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.7% of its workNursing: 8 fractional works · 2.2% of its workNutrition and Dietetics: 8 fractional works · 2.1% of its workSmaller subfields together: 0 fractional works · 0.1% of its workVeterinary: 1 fractional works · 0.2% of its workSmall Animals: 1 fractional works · 0.2% of its workDentistry: 0 fractional works · 0.1% of its workALL ITS WORKNjala University377fractional works, 2022-now
Life Sciences24%Physical Sciences30%Health Sciences18%Social Sciences27%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 26 fields, with their numbers
    1. Engineering4511.9%
    2. Environmental Science359.4%
    3. Computer Science195.0%
    4. Materials Science71.8%
    5. Mathematics41.0%
    6. Earth and Planetary Sciences30.7%
    7. Energy10.3%
    8. Chemistry10.2%
    9. Chemical Engineering00.1%
    10. Physics and Astronomy00.0%
    1. Social Sciences5815.4%
    2. Business, Management and Accounting153.9%
    3. Economics, Econometrics and Finance153.9%
    4. Psychology102.7%
    5. Arts and Humanities30.8%
    6. Decision Sciences30.7%
    1. Agricultural and Biological Sciences7820.6%
    2. Immunology and Microbiology61.6%
    3. Biochemistry, Genetics and Molecular Biology61.6%
    4. Pharmacology, Toxicology and Pharmaceutics10.2%
    5. Neuroscience00.1%
    1. Medicine4712.4%
    2. Health Professions123.3%
    3. Nursing82.2%
    4. Veterinary10.2%
    5. Dentistry00.1%
All of science, and how each field's share has moved since 1950: the Science domain explorer

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 4.34× its world share, 78 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.29× its world share, 6 worksBiochemistry, Geneti…Immunology and Microbiology: 1.59× its world share, 6 worksImmunology and Micro…Neuroscience: 0.04× its world share, 0 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.43× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 0.15× its world share, 0 worksChemical EngineeringChemistry: 0.14× its world share, 1 worksChemistryComputer Science: 0.64× its world share, 19 worksComputer ScienceEarth and Planetary Sciences: 0.47× its world share, 3 worksEarth and Planetary …Energy: 0.34× its world share, 1 worksEnergyEngineering: 0.80× its world share, 45 worksEngineeringEnvironmental Science: 1.89× its world share, 35 worksEnvironmental ScienceMaterials Science: 0.51× its world share, 7 worksMaterials ScienceMathematics: 0.86× its world share, 4 worksMathematicsPhysics and Astronomy: 0.02× its world share, 0 worksPhysics and AstronomyDentistry: 0.16× its world share, 0 worksDentistryHealth Professions: 1.25× its world share, 12 worksHealth ProfessionsMedicine: 0.65× its world share, 47 worksMedicineNursing: 4.58× its world share, 8 worksNursingVeterinary: 1.52× its world share, 1 worksVeterinaryArts and Humanities: 0.27× its world share, 3 worksArts and HumanitiesBusiness, Management and Accounting: 1.22× its world share, 15 worksBusiness, Management…Decision Sciences: 0.69× its world share, 2 worksDecision SciencesEconomics, Econometrics and Finance: 1.80× its world share, 14 worksEconomics, Econometr…Psychology: 0.88× its world share, 10 worksPsychologySocial Sciences: 1.22× its world share, 58 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Nursing, 4.6×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Nursing4.58×8 works
  2. Agricultural and Biological Sciences4.34×78 works
  3. Environmental Science1.89×35 works
  4. Economics, Econometrics and Finance1.80×14 works
  5. Immunology and Microbiology1.59×6 works
  6. Veterinary1.52×1 works
  7. Health Professions1.25×12 works
  8. Business, Management and Accounting1.22×15 works
  9. Social Sciences1.22×58 works
  10. Psychology0.88×10 works
  11. Mathematics0.86×4 works
  12. Engineering0.80×45 works
  13. Decision Sciences0.69×2 works
  14. Medicine0.65×47 works
  15. Computer Science0.64×19 works
  16. Materials Science0.51×7 works
  17. Earth and Planetary Sciences0.47×3 works
  18. Pharmacology, Toxicology and Pharmaceutics0.43×1 works
  19. Energy0.34×1 works
  20. Biochemistry, Genetics and Molecular Biology0.29×6 works
  21. Arts and Humanities0.27×3 works
  22. Dentistry0.16×0 works
  23. Chemical Engineering0.15×0 works
  24. Chemistry0.14×1 works
  25. Neuroscience0.04×0 works
  26. Physics and Astronomy0.02×0 works

Who are the top researchers at Njala University?

Ranked on the quality score, Rashid Ansumana, Abdul Salami Bah and Augustus Osborne lead among researchers whose main affiliation is Njala University.

  1. 1 Rashid Ansumana Sierra Leone · #239,551 worldwide 4.4k citations · 163 works
  2. 2 Abdul Salami Bah Sierra Leone · #270,549 worldwide 111 citations · 29 works
  3. 3 Augustus Osborne Sierra Leone · #296,042 worldwide 4k citations · 162 works
  4. 4 Esther Yei Mokuwa Sierra Leone · #915,471 worldwide 1k citations · 26 works
  5. 5 Camilla Bangura Sierra Leone · #950,463 worldwide 363 citations · 58 works
  6. 6 Lawrence Sao Babawo Sierra Leone · #1,049,469 worldwide 356 citations · 28 works
  7. 7 Juana Paul Moiwo Sierra Leone · #1,130,716 worldwide 1.5k citations · 61 works
  8. 8 Aiah R. Lebbie Sierra Leone · #1,146,660 worldwide 694 citations · 41 works
  9. 9 Regina Mamidy Yillah Sierra Leone · #1,498,725 worldwide 52 citations · 15 works
  10. 10 Joseph Morrison Lamin Sierra Leone · #1,889,485 worldwide 849 citations · 37 works
All ranked researchers at Njala University

What are the most cited papers from Njala University?

The most cited paper from Njala University is "Pharmaceutical pollution of the world’s rivers" (John L. Wilkinson et al., 2022), with 1,634 citations. Next come "Burden of 375 diseases and injuries, risk-attributable burden of 88 risk factors, and healthy life expectancy in 204 countries and territories, including 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023" (762) and "Global burden of 292 causes of death in 204 countries and territories and 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023" (500).

Most cited papers
#PaperReleasedCitations
1 Pharmaceutical pollution of the world’s rivers John L. Wilkinson et al. · Proceedings of the National Academy of Sciences Open access127 authors 14 Feb 2022 1,634
2 Burden of 375 diseases and injuries, risk-attributable burden of 88 risk factors, and healthy life expectancy in 204 countries and territories, including 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023 Simon I Hay et al. · The Lancet Open access2,780 authors Oct 2025 762
3 Global burden of 292 causes of death in 204 countries and territories and 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023 Mohsen Naghavi et al. · The Lancet Open access2,463 authors Oct 2025 500
4 Determinants of Variation in Tropical Forest Primate Biomass: New Evidence from West Africa John F. Oates, George H. Whitesides, A. GLYN DAVIES et al. · Ecology Feb 1990 341
5 The global, regional, and national burden of cancer, 1990–2023, with forecasts to 2050: a systematic analysis for the Global Burden of Disease Study 2023 Lisa M Force et al. · The Lancet Open access1,377 authors 25 Sep 2025 330
All 61 most cited papers, with filters and sorting

Which keywords describe research at Njala University?

By fractional works in 2022-now, weighted toward what it does more of than the world: Climate Change, Smallholder Farmers, Sustainability, Adaptation, Sustainable Agriculture, Environmental Impact, Genetic Diversity and Globalization.

▲ more of its work than of the world's◆ about the world's share▼ less than the world's

Size is fractional works in 2022-now in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Climate Change30▲ 3.0×41 topics
  2. Sustainability25▲ 2.7×31 topics
  3. Environmental Impact19▲ 3.0×34 topics
  4. Globalization19▲ 2.6×26 topics
  5. Smallholder Farmers16▲ 21×5 topics
  6. Adaptation14▲ 12×4 topics
  7. Sustainable Agriculture13▲ 11×7 topics
  8. Genetic Diversity12▲ 7.1×14 topics
  9. Biodiversity Conservation11▲ 7.6×8 topics
  10. Biodiversity10▲ 3.5×14 topics
  11. Food Security9▲ 4.5×12 topics
  12. Pathogenesis9▲ 4.7×9 topics
  13. Diversity9▲ 13×2 topics
  14. Agroecology8▲ 16×2 topics
  15. Gender Equality8▲ 7.2×9 topics
  16. Agricultural Development8▲ 13×3 topics
  17. Livestock Farming8▲ 34×3 topics
  18. Child Development7▲ 4.7×4 topics
  19. Multifunctionality7▲ 42×1 topic
  20. Work Organization7▲ 50×1 topic
  21. Climate Resilience7▲ 32×2 topics
  22. Drought Tolerance7▲ 14×7 topics
  23. Global Burden of Disease7▲ 7.8×4 topics
  24. Vaccine7▲ 4.8×10 topics
  25. Rural Development7▲ 5.5×8 topics
  26. Land Use Change7▲ 5.9×6 topics
  27. Maternal and Child Undernutrition6▲ 21×1 topic
  28. Water Sanitation Hygiene6▲ 21×1 topic
  29. Cassava6▲ 88×1 topic
  30. Cyanogenic Glycosides6▲ 88×1 topic
  31. Lifelong Learning6▲ 7.9×4 topics
  32. Poverty Reduction6▲ 12×4 topics
  33. Maternal Mortality6▲ 7.0×2 topics
  34. One Health6▲ 45×1 topic
  35. Zoonotic Diseases6▲ 45×1 topic
  36. Community Health Workers6▲ 17×2 topics
  37. Transmission6▲ 27×2 topics
  38. Health Inequalities6▲ 12×3 topics
  39. Agroforestry5▲ 21×3 topics
  40. Child Mortality5▲ 19×1 topic

Which research topics does Njala University publish most on?

By volume in 2022-now: Agriculture and Rural Development Research, Child Nutrition and Water Access, Cassava research and cyanide and Zoonotic diseases and public health.

Agriculture and Rural De…7Agriculture and Rural Development Research: 7 fractional worksChild Nutrition and Wate…6Child Nutrition and Water Access: 6 fractional worksCassava research and cya…6Cassava research and cyanide: 6 fractional worksZoonotic diseases and pu…6Zoonotic diseases and public health: 6 fractional worksGlobal Maternal and Child Health: 5 fractional worksViral Infections and Outbreaks Research: 5 fractional worksAfrican Botany and Ecolo…4African Botany and Ecology Studies: 4 fractional worksAgricultural Innovations…4Agricultural Innovations and Practices: 4 fractional worksAgricultural pest manage…3Agricultural pest management studies: 3 fractional worksInnovative concrete rein…3Innovative concrete reinforcement materials: 3 fractional works
Ecology, Evolution, Behavior and SystematicsNutrition and DieteticsPlant SciencePublic Health, Environmental and Occupational Health5 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Agriculture and Rural Development Research Ecology, Evolution, Behavior and Systematics 7 works
  2. 2 Child Nutrition and Water Access Nutrition and Dietetics 6 works
  3. 3 Cassava research and cyanide Plant Science 6 works
  4. 4 Zoonotic diseases and public health Public Health, Environmental and Occupational Health 6 works
  5. 5 Global Maternal and Child Health Pediatrics, Perinatology and Child Health 5 works
  6. 6 Viral Infections and Outbreaks Research Infectious Diseases 5 works
  7. 7 African Botany and Ecology Studies Forestry 4 works
  8. 8 Agricultural Innovations and Practices General Agricultural and Biological Sciences 4 works
  9. 9 Agricultural pest management studies Plant Science 3 works
  10. 10 Innovative concrete reinforcement materials Civil and Structural Engineering 3 works

How open and international is its research?

Against the world's own shares: the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available74.2%not open25.8%

World: 40% of research is openly available.

with international co-authors34.4%domestic only65.6%

World: 18% is written across borders.

How has Njala University's research output changed?

Output in 2022-2025 was 162% higher than in 2018-2021.

still counting1990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Njala University as a percentage of every work published that year, 0.0016% in 2024.

still counting0.0020%0.0040%Njala University0.0016% in 202519801990200020102020

Fractional works of Njala University over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025Njala University8.0% in 20252020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 8.0% in 2024.

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Njala University on Science Explorer

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