CHIZU — the atlas of coffee research
Coffee research in Brazil
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 10,857 papers are 10,857 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.
Brazil 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
1924–2026
10,855 of the 10,857 papers carry a year. The rest have none.
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
- Phenolic compounds in coffee2006cited 839open access
- Multifunctional shade-tree management in tropical agroforestry landscapes - a review2011cited 801open access
- Meta‐analysis of early nonmotor features and risk factors for Parkinson disease2012cited 774open access
- Impacts of drought and temperature stress on coffee physiology and production: a review2006cited 669open access
- The coffee genome provides insight into the convergent evolution of caffeine biosynthesis2014cited 666open access
- Properties of biochar derived from wood and high-nutrient biomasses with the aim of agronomic and environmental benefits2017cited 641open access
- Maternal psychological stress and distress as predictors of low birth weight, prematurity and intrauterine growth retardation2003cited 621open access
- Photosynthetic pigments, nitrogen, chlorophyll a fluorescence and SPAD-502 readings in coffee leaves2005cited 597
- Ecophysiology of coffee growth and production2007cited 575open access
- Chlorogenic Acids from Green Coffee Extract are Highly Bioavailable in Humans2008cited 572
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 10,857 papers, 3,328 carry one. The breakdown below is about those 3,328 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 10,857 papers, 9,522 carry one. The breakdown below is about those 9,522 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. Brazil has 10,857 — a factor of 2.
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 17,988United Kingdom 5,569China 4,887India 3,542Germany 3,185Italy 3,111France 3,072Japan 2,822Colombia 2,489Spain 2,363Canada 2,352