CHIZU — the atlas of coffee research
Coffee research in Congo - Brazzaville
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 26 papers are 26 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.
Congo - Brazzaville 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
1994–2024
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
- Evolution in Caffeoylquinic Acid Content and Histolocalization During Coffea canephora Leaf Development2006cited 175open access
- SSR mining in coffee tree EST databases: potential use of EST–SSRs as markers for the Coffea genus2006cited 154
- Introgression molecular analysis of a leaf rust resistance gene from Coffea liberica into C. arabica L.2004cited 64
- Genetic diversity of wild and cultivated Coffea canephora in northeastern DR Congo and the implications for conservation2021cited 28open access
- Coffee seed conservation biology: Fundamental aspects and practical implications. A review2012cited 10open access
- Impact of coffee biochar on soil carbon, microbial biomass and enzymatic activities in Semiarid Entisol cultivated with maize2020cited 9open access
- Crop-to-wild gene flow in wild coffee species: the case of Coffea canephora in the Democratic Republic of the Congo2024cited 6open access
- Development at the Border: Policies and National Integration in Côte D'Ivoire and its Neighbors2013cited 5open access
- History of the Discovery of American Trypanosomiasis (Chagas Disease)2010cited 5
- Du mûrier au caféier : Histoire des plantes introduites en pays mixtèque (XVIe-XXe siècle)1994cited 4
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 26 papers, 7 carry one. The breakdown below is about those 7 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 26 papers, 26 carry one. The breakdown below is about those 26 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. Congo - Brazzaville has 26 — a factor of 856.
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