CHIZU — the atlas of coffee research
Coffee research in Vietnam
Two limits come with this count. Only 100,474 of the 190,643 searchable papers (52.7%) carry an author affiliation country. The other 90,169 (47.3%) carry none. So these 715 papers are 715 out of the 100,474 whose affiliation is known. And a co-authored paper is counted once for every country its authors sit in. Per-country counts therefore do not add up to the whole.
Vietnam is a coffee-producing country.
Check it yourself
This is not our word for it. You can run the same query against the same index.
When they were written
1990–2026
Years before 1600 are treated as unknown. The upstream data (OpenAlex) sometimes writes 1400 when the year is missing, and that is a placeholder, not a measurement.
Where they appeared
Top 8 sources (journals and repositories)
Most cited
10 papers, most cited first
- Adsorption isotherms and kinetic modeling of methylene blue dye onto a carbonaceous hydrochar adsorbent derived from coffee husk waste2020cited 338
- Fungal Planet description sheets: 785– 8672018cited 283open access
- Study on chitosan nanoparticles on biophysical characteristics and growth of Robusta coffee in green house2013cited 270
- Research on impact of chitosan oligomers on biophysical characteristics, growth, development and drought resistance of coffee2010cited 265
- Influence of pyrolysis temperature on polycyclic aromatic hydrocarbons production and tetracycline adsorption behavior of biochar derived from spent coffee ground2019cited 213
- Why could the coffee crop endure climate change and global warming to a greater extent than previously estimated?2018cited 197open access
- Trajectories of deforestation, coffee expansion and displacement of shifting cultivation in the Central Highlands of Vietnam2013cited 187open access
- Preparation of NPK nanofertilizer based on chitosan nanoparticles and its effect on biophysical characteristics and growth of coffee in green house2018cited 180
- Chemical, physical and biological methods to convert lignocellulosic waste into value-added products. A review2022cited 175
- Valorization of spent coffee grounds into biofuels and value-added products: Pathway towards integrated bio-refinery2019cited 170open access
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 715 papers, 263 carry one. The breakdown below is about those 263 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
Which field
Only 75.9% of the whole index carries a field label. Of this country's 715 papers, 539 carry one. The breakdown below is about those 539 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
What language
"undetermined" means the upstream record carried no language. We did not guess one.
Knowledge is not evenly spread
Counting only papers whose author affiliation is known, the largest is Indonesia with 22,248. Vietnam has 715 — a factor of 31.
That gap does not follow where coffee is grown. Research gathers where the means to do research are, not where the coffee is. Making that visible is why CHIZU exists.
Other countries
Indonesia 22,248United States 17,988Brazil 10,857United Kingdom 5,569China 4,887India 3,542Germany 3,185Italy 3,111France 3,072Japan 2,822Colombia 2,489Spain 2,363