CHIZU — the atlas of coffee research
Coffee research in Rwanda
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 89 papers are 89 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.
Rwanda 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
1988–2026
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
- Chemical Discrimination of Arabica and Robusta Coffees by Fourier Transform Raman Spectroscopy2005cited 140
- Agroforestry, water and soil fertility management to fight erosion in tropical mountains of Rwanda1997cited 98
- Cooperative membership and coffee productivity in Rwanda’s specialty coffee sector2019cited 60
- Farmer incentives and value chain governance: Critical elements to sustainable growth in Rwanda's coffee sector2018cited 43
- Imaging in the Land of 1000 Hills: Rwanda Radiology Country Report2015cited 38open access
- Pests and diseases regulation in coffee agroecosystems by management systems and resistance in changing climate conditions: a review2022cited 25open access
- Managing Tephrosia mulch and fertilizer to enhance coffee productivity on smallholder farms in the Eastern African Highlands2013cited 25
- An Intelligent System-Based Coffee Plant Leaf Disease Recognition Using Deep Learning Techniques on Rwandan Arabica Dataset2023cited 25open access
- An internet of things (IoT)-based optimum tea fermentation detection model using convolutional neural networks (CNNs) and majority voting techniques2021cited 24open access
- Impact of chemical fertilizers on diversity and abundance of soil-litter arthropod communities in coffee and banana plantations in southern Rwanda2023cited 23open access
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 89 papers, 38 carry one. The breakdown below is about those 38 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 89 papers, 72 carry one. The breakdown below is about those 72 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. Rwanda has 89 — a factor of 250.
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