CHIZU — the atlas of coffee research
Coffee research in Tanzania
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 286 papers are 286 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.
Tanzania 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
1957–2026
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
- Soda consumption and the risk of stroke in men and women2012cited 189open access
- Towards a Phylogeny for Coffea (Rubiaceae): Identifying Well-supported Lineages Based on Nuclear and Plastid DNA Sequences2007cited 146open access
- Physical and combustion properties of agricultural residue bio-char bio-composite briquettes as sustainable domestic energy sources2019cited 133
- Thermal characterization of tropical biomass feedstocks2010cited 131
- Impacts of climate and land use on N2O and CH4 fluxes from tropical ecosystems in the Mt. Kilimanjaro region, Tanzania2017cited 101
- Characterisation of tannin resin blends for particle board applications2003cited 86
- A very-hot food and beverage thermal exposure index and esophageal cancer risk in Malawi and Tanzania: findings from the ESCCAPE case–control studies2022cited 82open access
- Institutional Adjustment and Transaction Costs: Product and Inputs Markets in the Tanzanian Coffee System2002cited 76
- Dynamics of banana-based farming systems in Bukoba district, Tanzania: changes in land use, cropping and cattle keeping2004cited 64
- Nutrient balances and their consequences in the banana-based land use systems of Bukoba district, northwest Tanzania1998cited 64
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 286 papers, 79 carry one. The breakdown below is about those 79 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 286 papers, 241 carry one. The breakdown below is about those 241 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. Tanzania has 286 — a factor of 78.
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