CHIZU — the atlas of coffee research
Coffee research in Papua New Guinea
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 28 papers are 28 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.
Papua New Guinea 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
1955–2026
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
- Ear, nose and throat foreign bodies in Melanesian children: An analysis of 1037 cases2006cited 81
- Food shortages are associated with droughts, floods, frosts and ENSO in Papua New Guinea2016cited 46
- First Report of Race TTRTF of Wheat Stem Rust (Puccinia graminis f. sp. tritici) in Eritrea2019cited 24open access
- Recent work on biological control in Papua New Guinea and some suggestions for the future∗1982cited 21
- Respiratory impairment in coffee factory workers in the Asaro Valley of Papua New Guinea.1985cited 16open access
- Otoia, ancestral village of the Kerewo: Modelling the historical emergence of Kerewo regional polities on the island of Goaribari, south coast of mainland Papua New Guinea2012cited 10open access
- Root architecture, root biomass and nutrient cycling in a mixed‐species agroforestry system2023cited 9open access
- The 1976 coffee boom in Papua New Guinea1977cited 8
- “Our fair trade coffee tastes better”: It might, but under what conditions?2021cited 6open access
- Short-rotation coppice agroforestry for charcoal small business in Papua New Guinea2017cited 5open access
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 28 papers, 9 carry one. The breakdown below is about those 9 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 28 papers, 21 carry one. The breakdown below is about those 21 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. Papua New Guinea has 28 — a factor of 795.
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