Science Explorer Interactive view Map
Research facility · Sofia · Bulgaria

Institute of Soil Science “Nikola Poushkarov”

In research, Institute of Soil Science “Nikola Poushkarov” stands highest in Agricultural and Biological Sciences (#5,377 of 6,031 worldwide), Life Sciences (#14,082 of 14,347 worldwide) and Physical Sciences (#21,266 of 21,541 worldwide), over all time. Relative to its size it is most specialised in Agricultural and Biological Sciences — Agricultural and Biological Sciences is 8.5× its share of world research.

iss-poushkarov.org/nachalo_En.htmROR OpenAlex
World rank, 2022–2025
#27,667
of 28,054 · #39,426 all time
Rank in Bulgaria
#91
of 92
Research works
323
▲ 33% vs 2013–17
Citations
2.3k
7.0 per fractional work
Top-10% rate
2.9%
record average 16.5%
Open access
41%
world 28%

What is Institute of Soil Science “Nikola Poushkarov” known for in research?

The fields where it stands highest, over all time, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorks
Agricultural and Biological SciencesField #5,377 of 6,031 3.8%164
Life SciencesDomain #14,082 of 14,347 3.7%176
Physical SciencesDomain #21,266 of 21,541 4.7%132

Each strip is that field’s whole ranked pool, with the notch where Institute of Soil Science “Nikola Poushkarov” 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 world mark, because the world rate differs by field (from about 6% to 21% in this record).

What does Institute of Soil Science “Nikola Poushkarov” specialise in?

Where its research is concentrated relative to its size: Agricultural and Biological Sciences takes 8.5× the share of its output that it takes of world research.

  1. Agricultural and Biological SciencesField · 29.3 works8.5×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

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: 8.51× its world share, 29 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.41× its world share, 2 worksBiochemistry, Geneti…Pharmacology, Toxicology and Pharmaceutics: 0.58× its world share, 0 worksPharmacology, Toxico…Chemical Engineering: 1.32× its world share, 0 worksChemical EngineeringChemistry: 0.15× its world share, 0 worksChemistryComputer Science: 0.17× its world share, 1 worksComputer ScienceEarth and Planetary Sciences: 5.54× its world share, 6 worksEarth and Planetary …Energy: 1.13× its world share, 1 worksEnergyEngineering: 1.35× its world share, 15 worksEngineeringEnvironmental Science: 3.99× its world share, 14 worksEnvironmental ScienceMaterials Science: 0.48× its world share, 1 worksMaterials ScienceHealth Professions: 0.47× its world share, 1 worksHealth ProfessionsMedicine: 0.01× its world share, 0 worksMedicineNursing: 0.94× its world share, 0 worksNursingArts and Humanities: 0.03× its world share, 0 worksArts and HumanitiesEconomics, Econometrics and Finance: 0.21× its world share, 0 worksEconomics, Econometr…Social Sciences: 0.10× its world share, 1 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Agricultural and Biological Sciences, 8.5×. Every wedge is a field page.

Who are the top researchers at Institute of Soil Science “Nikola Poushkarov”?

Ranked on the composite score, I. Mitova, G. Kostadinov and Milena Kercheva lead among researchers whose main affiliation is Institute of Soil Science “Nikola Poushkarov”.

  1. 1 I. Mitova Bulgaria · #929,269 worldwide 9 citations · 16 works
  2. 2 G. Kostadinov Bulgaria · #1,131,835 worldwide 9 citations · 20 works
  3. 3 Milena Kercheva Bulgaria · #1,354,702 worldwide 48 citations · 18 works
  4. 4 N. Petrov Bulgaria · #1,602,109 worldwide 10 citations · 17 works
All ranked researchers at Institute of Soil Science “Nikola Poushkarov”

Which keywords describe research at Institute of Soil Science “Nikola Poushkarov”?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Climate Change, Soil Fertility, Microbial Communities, Crop Productivity, Toxicity, Environmental Impact, Heavy Metals and Soil Carbon Sequestration.

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

Size is fractional works in 2022–2025 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 Change10▲ 5.1×19 topics
  2. Soil Fertility6▲ 37×6 topics
  3. Environmental Impact6▲ 4.5×14 topics
  4. Microbial Communities6▲ 18×2 topics
  5. Crop Productivity5▲ 101×3 topics
  6. Toxicity4▲ 14×5 topics
  7. Remote Sensing4▲ 4.8×10 topics
  8. Sustainability4▲ 2.4×8 topics
  9. Heavy Metals4▲ 24×4 topics
  10. Soil Carbon Sequestration4▲ 71×2 topics
  11. Black Sea4▲ 128×1 topic
  12. Holocene4▲ 44×1 topic
  13. Soil Moisture4▲ 72×3 topics
  14. Agricultural Sustainability3▲ 41×3 topics
  15. Sustainable Agriculture3▲ 15×7 topics
  16. Horticultural Crops3▲ 60×2 topics
  17. Water Scarcity3▲ 58×2 topics
  18. Sustainable Development3▲ 2.7×8 topics
  19. Bioavailability3▲ 22×2 topics
  20. Biochar Application3▲ 40×1 topic
  21. Deficit Irrigation3▲ 180×1 topic
  22. Desertification3▲ 115×2 topics
  23. Ecosystem Functioning3▲ 22×2 topics
  24. Land Use Change3▲ 14×3 topics
  25. Nitrogen Cycle3▲ 67×1 topic
  26. Pollution3▲ 22×2 topics
  27. Water Use Efficiency3▲ 131×1 topic
  28. Contamination3▲ 47×2 topics
  29. Genetic Improvement3▲ 46×3 topics
  30. Agricultural Impact3▲ 204×2 topics
  31. Soil Degradation3▲ 70×2 topics
  32. Food Security3▲ 6.5×4 topics
  33. Health Risk3▲ 60×1 topic
  34. Paleosols3▲ 222×1 topic
  35. Soil3▲ 60×1 topic
  36. Soil Evolution3▲ 222×1 topic
  37. Agriculture2▲ 7.3×2 topics
  38. Global Carbon Budget2▲ 40×2 topics
  39. Sediment Transport Models2▲ 75×1 topic
  40. Soil Erosion2▲ 75×1 topic

Which research topics does Institute of Soil Science “Nikola Poushkarov” publish most on?

By volume in 2022–2025: Marine and environmental studies, Irrigation Practices and Water Management, Soil Carbon and Nitrogen Dynamics and Heavy metals in environment.

Marine and environmental…4Marine and environmental studies: 4 fractional worksIrrigation Practices and…3Irrigation Practices and Water Management: 3 fractional worksSoil Carbon and Nitrogen…3Soil Carbon and Nitrogen Dynamics: 3 fractional worksHeavy metals in environm…3Heavy metals in environment: 3 fractional worksSoil and Environmental Studies: 3 fractional worksSoil erosion and sediment transport: 2 fractional worksComposting and Vermicomp…2Composting and Vermicomposting Techniques: 2 fractional worksSoil and Unsaturated Flow: 2 fractional worksSoil Mechanics and Vehicle Dynamics: 1 fractional worksAgriculture and Biological Studies: 1 fractional works
OceanographySoil SciencePollutionCivil and Structural Engineering1 others

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

  1. 1 Marine and environmental studies Oceanography 4 works
  2. 2 Irrigation Practices and Water Management Soil Science 3 works
  3. 3 Soil Carbon and Nitrogen Dynamics Soil Science 3 works
  4. 4 Heavy metals in environment Pollution 3 works
  5. 5 Soil and Environmental Studies Soil Science 3 works
  6. 6 Soil erosion and sediment transport Soil Science 2 works
  7. 7 Composting and Vermicomposting Techniques Soil Science 2 works
  8. 8 Soil and Unsaturated Flow Civil and Structural Engineering 2 works
  9. 9 Soil Mechanics and Vehicle Dynamics Civil and Structural Engineering 1 works
  10. 10 Agriculture and Biological Studies General Agricultural and Biological Sciences 1 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 available40.6%not open59.4%

World: 28% of research is openly available.

with international co-authors17.2%domestic only82.8%

World: 19% is written across borders.

How has Institute of Soil Science “Nikola Poushkarov”'s research output changed?

Output in 2018–2022 was 33% higher than in 2013–2017.

1990200020102020
grewheldshrank

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

Other research institutions in Sofia

All research institutions in Sofia

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.