Effects of the application of charred bark of Acacia mangium on the yield of maize, cowpea and peanut, and soil chemical properties in South Sumatra, Indonesia
Open accessAbstract
Charred bark of Acacia mangium (bark charcoal), which is made of wood waste from pulp production, was applied as soil amendment for the cultivation of maize, cowpea and peanut to examine its effects on crop yield and soil chemical properties in South Sumatra, Indonesia. The yields of maize and peanut significantly increased after the application of bark charcoal under a fertilized condition in an infertile soil environment. In addition, increases in the root amount and colonization rate of arbuscular mycorrhizal (AM) fungi after bark charcoal application were also observed in maize. In general, the application of bark charcoal induced changes in soil chemical properties by increasing the pH value, total N and available P2O5 contents, cation exchange capacity, amounts of exchangeable cations and base saturation, and by decreasing the content of exchangeable Al3+. The amelioration of the soil chemical properties could be effective in highly weathered infertile tropical soils. The application of charcoal in agriculture is expected to lead to the formation of a carbon sink in soil and to increase crop yield because it has been suggested that charcoal is highly resistant to abiotic and biotic degradation, even in a soil environment.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Biochar has been reported to either increase or decrease plant growth, based on studies with varying factors including soil and biochar types and pyrolysis conditions associated with the biochars tested.
“Biochar has been reported to either increase (Chan et al., 2008;Yamato et al., 2006) or decrease (Deenik et al., 2010) plant growth, based on studies with varying factors including soil and biochar types and pyrolysis conditions associated with the biochars tested.”
From Biochar implications for sustainable agriculture and environment: A review (2019) · cites this paper as Yamato et al., 2006
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
AN EVALUATION OF TECHNIQUES FOR MEASURING VESICULAR ARBUSCULAR MYCORRHIZAL INFECTION IN ROOTS
Giovannetti, M., & Mosse, B. (1980) · New Phytologist · doi:10.1111/j.1469-8137.1980.tb04556.x · Cited by 5,931 · see citing works
Glaser, B., Lehmann, J., & Zech, W. (2002) · Biology and Fertility of Soils · doi:10.1007/s00374-002-0466-4 · Cited by 2,890 · see citing works
Black carbon in density fractions of anthropogenic soils of the Brazilian Amazon region
Glaser, B., Balashov, E. V., Haumaier, L., Guggenberger, G., & Zech, W. (2000) · Organic Geochemistry · doi:10.1016/s0146-6380(00)00044-9 · Cited by 518 · see citing works
Effect of Charcoal on Certain Physical, Chemical, and Biological Properties of Forest Soils
Tryon, E. H. (1948) · Ecological Monographs · doi:10.2307/1948629 · Cited by 378 · see citing works
Charred organic carbon in German chernozemic soils
Schmidt, M. W. I., Skjemstad, J. O., Gehrt, E., & Kögel‐Knabner, I. (1999) · European Journal of Soil Science · doi:10.1046/j.1365-2389.1999.00236.x · Cited by 340 · see citing works
Ishii, T., & Kadoya, K. (1994) · Journal of the Japanese Society for Horticultural Science · doi:10.2503/jjshs.63.529 · Cited by 167 · see citing works
Piccolo, A., Pietramellara, G., & Mbagwu, J. S. C. (1996) · Soil Use and Management · doi:10.1111/j.1475-2743.1996.tb00545.x · Cited by 126 · see citing works
Effect of charcoal, coal and peat on the yield of moong soybean and pea
Iswaran, V., Jauhri, K. S., & Sen, A. (1980) · Soil Biology and Biochemistry · doi:10.1016/0038-0717(80)90057-7 · Cited by 102 · see citing works
Elementary composition, humus composition, and decomposition in soil of charred grassland plants
Shindo, H. (1991) · Soil Science & Plant Nutrition · doi:10.1080/00380768.1991.10416933 · Cited by 90 · see citing works
Ezawa, T., Yamamoto, K., & Yoshida, S. (2002) · Soil Science & Plant Nutrition · doi:10.1080/00380768.2002.10408718 · Cited by 87 · see citing works
Okimori, Y., Ogawa, M., & Takahashi, F. (2003) · Mitigation and Adaptation Strategies for Global Change · doi:10.1023/b:miti.0000005643.79908.5a · Cited by 78 · see citing works
Self-citationCharcoal as a micro-habitat for VA mycorrhizal fungi, and its practical implication
Saito, M. (1990) · Agriculture Ecosystems & Environment · doi:10.1016/0167-8809(90)90298-r · Cited by 67 · see citing works
Symbiosis of people and nature in the Tropics
Ogawa, M. (1994) · Medical Entomology and Zoology · Cited by 58 · see citing works
Self-citation
Flagged first, then by citations
Research works printed but not linked: 2
- Ogawa M 1989: Inoculation methods of VAM fungi: charcoal ball method and rice hull method. In Recent Advances in Microbial Ecology, Eds T Hattori, Y Ishida, Y Maruyama, R Morita, A Uchida, pp. 247-252, Japan Scientific Societies Press, Tokyo.
- Ogawa M 1997: Charcoal-utilization of fixed carbon and its return to environment. In Annual Research Report in 1998 on Carbon-Sink Project Development, pp. 177 - 184, Japan International Forestry Promotion and Cooperation Center (in Japanese).
Cited by
Sorted by citations
Biochar effects on soil biota – A review
Lehmann, J., Rillig, M. C., Thies, J., Masiello, C. A., Hockaday, W. C., & Crowley, D. (2011) · Soil Biology and Biochemistry · doi:10.1016/j.soilbio.2011.04.022 · Cited by 5,074 · see citing works
Sustainable biochar to mitigate global climate change
Woolf, D., Amonette, J. E., Street-Perrott, F. A., Lehmann, J., & Joseph, S. (2010) · Nature Communications · doi:10.1038/ncomms1053 · Cited by 2,680 · see citing works
Jeffery, S., Verheijen, F. G. A., van der Velde, M., & Bastos, A. C. (2011) · Agriculture, Ecosystems & Environment · doi:10.1016/j.agee.2011.08.015 · Cited by 2,422 · see citing works
A review of biochar and its use and function in soil
Sohi, S. P., Krull, E., Lopez-Capel, E., & Bol, R. (2010) · Advances in Agronomy · doi:10.1016/s0065-2113(10)05002-9 · Cited by 2,240 · see citing works
Atkinson, C. J., Fitzgerald, J. D., & Hipps, N. A. (2010) · Plant and Soil · doi:10.1007/s11104-010-0464-5 · Cited by 2,154 · see citing works
Biochar and its effects on plant productivity and nutrient cycling: A meta-analysis
Biederman, L. A., & Harpole, W. S. (2013) · GCB Bioenergy · doi:10.1111/gcbb.12037 · Cited by 1,737 · see citing works
Beesley, L., Moreno-Jiménez, E., Gomez-Eyles, J. L., Harris, E., Robinson, B., & Sizmur, T. (2011) · Environmental Pollution · doi:10.1016/j.envpol.2011.07.023 · Cited by 1,610 · see citing works
Impact of biochar amendments on the quality of a typical Midwestern agricultural soil
Laird, D. A., Fleming, P., Davis, D. D., Horton, R., Wang, B., & Karlen, D. L. (2010) · Geoderma · doi:10.1016/j.geoderma.2010.05.013 · Cited by 1,385 · see citing works
Maize yield and nutrition during 4 years after biochar application to a Colombian savanna oxisol
Major, J., Rondon, M., Molina, D., Riha, S. J., & Lehmann, J. (2010) · Plant and Soil · doi:10.1007/s11104-010-0327-0 · Cited by 1,382 · see citing works
Mycorrhizal responses to biochar in soil–concepts and mechanisms
Warnock, D. D., Lehmann, J., Kuyper, T. W., & Rillig, M. C. (2007) · Plant and Soil · doi:10.1007/s11104-007-9391-5 · Cited by 1,269 · see citing works
Biochar: A synthesis of its agronomic impact beyond carbon sequestration
Spokas, K. A., Cantrell, K. B., Novak, J. M., Archer, D. W., Ippolito, J. A., Collins, H. P., Boateng, A. A., Lima, I. M., Lamb, M. C., McAloon, A. J., et al. (2012) · Journal of Environmental Quality · doi:10.2134/jeq2011.0069 · Cited by 1,014 · see citing works
Biochar amendment techniques for upland rice production in Northern Laos
Asai, H., Samson, B. K., Stephan, H. M., Songyikhangsuthor, K., Homma, K., Kiyono, Y., Inoue, Y., Shiraiwa, T., & Horie, T. (2009) · Field Crops Research · doi:10.1016/j.fcr.2008.10.008 · Cited by 931 · see citing works
The role of biochar and biochar-compost in improving soil quality and crop performance: a review
Agegnehu, G., Srivastava, A. K., & Bird, M. I. (2017) · Applied Soil Ecology · doi:10.1016/j.apsoil.2017.06.008 · Cited by 928 · see citing works
Agegnehu, G., Bass, A. M., Nelson, P. N., & Bird, M. I. (2016) · Science of The Total Environment · doi:10.1016/j.scitotenv.2015.11.054 · Cited by 909 · see citing works
Rajkovich, S., Enders, A., Hanley, K., Hyland, C., Zimmerman, A. R., & Lehmann, J. (2012) · Biology and Fertility of Soils · doi:10.1007/s00374-011-0624-7 · Cited by 872 · see citing works
Liu, X., Zhang, A., Ji, C., Joseph, S., Bian, R., Li, L., Pan, G., & Paz-Ferreiro, J. (2013) · Plant and Soil · doi:10.1007/s11104-013-1806-x · Cited by 793 · see citing works
Kookana, R. S., Sarmah, A. K., Van Zwieten, L., Krull, E., & Singh, B. (2011) · Advances in agronomy · doi:10.1016/b978-0-12-385538-1.00003-2 · Cited by 712 · see citing works
Quality variations of poultry litter biochar generated at different pyrolysis temperatures
Song, W., & Guo, M. (2012) · Journal of Analytical and Applied Pyrolysis · doi:10.1016/j.jaap.2011.11.018 · Cited by 693 · see citing works
Effect of biochar on soil physical properties in two contrasting soils: an Alfisol and an Andisol
Herath, H. M. S. K., Camps-Arbestain, M., & Hedley, M. (2013) · Geoderma · doi:10.1016/j.geoderma.2013.06.016 · Cited by 674 · see citing works
Multifunctional applications of biochar beyond carbon storage
Bolan, N., Hoang, S. A., Beiyuan, J., Gupta, S., Hou, D., Karakoti, A., Joseph, S., Jung, S., Kim, K.-H., Kirkham, M. B., et al. (2022) · International Materials Reviews · doi:10.1080/09506608.2021.1922047 · Cited by 638 · see citing works
Past, present, and future of biochar
Chen, W., Meng, J., Han, X., Lan, Y., & Zhang, W. (2019) · Biochar · doi:10.1007/s42773-019-00008-3 · Cited by 552 · see citing works
Zhang, A., Liu, Y., Pan, G., Hussain, Q., Li, L., Zheng, J., & Zhang, X. (2012) · Plant and Soil · doi:10.1007/s11104-011-0957-x · Cited by 539 · see citing works
Biochar for crop production: potential benefits and risks
Hussain, M., Farooq, M., Nawaz, A., Al-Sadi, A. M., Solaiman, Z. M., Alghamdi, S. S., Ammara, U., Ok, Y. S., & Siddique, K. H. M. (2017) · Journal of Soils and Sediments · doi:10.1007/s11368-016-1360-2 · Cited by 532 · see citing works
Biochemical cycling of nitrogen and phosphorus in biochar-amended soils
Gul, S., & Whalen, J. K. (2016) · Soil Biology and Biochemistry · doi:10.1016/j.soilbio.2016.08.001 · Cited by 519 · see citing works
Obia, A., Mulder, J., Martinsen, V., Cornelissen, G., & Børresen, T. (2016) · Soil and Tillage Research · doi:10.1016/j.still.2015.08.002 · Cited by 488 · see citing works
Hale, S. E., Alling, V., Martinsen, V., Mulder, J., Breedveld, G. D., & Cornelissen, G. (2013) · Chemosphere · doi:10.1016/j.chemosphere.2012.12.057 · Cited by 480 · see citing works
Biochar as a strategy to sequester carbon and increase yield in durum wheat
Vaccari, F. P., Baronti, S., Lugato, E., Genesio, L., Castaldi, S., Fornasier, F., & Miglietta, F. (2011) · European Journal of Agronomy · doi:10.1016/j.eja.2011.01.006 · Cited by 473 · see citing works
Beesley, L., Inneh, O. S., Norton, G. J., Moreno-Jimenez, E., Pardo, T., Clemente, R., & Dawson, J. J. C. (2014) · Environmental Pollution · doi:10.1016/j.envpol.2013.11.026 · Cited by 452 · see citing works
Joseph, S., Graber, E., Chia, C., Munroe, P., Donne, S., Thomas, T., Nielsen, S., Marjo, C., Rutlidge, H., Pan, G., et al. (2013) · Carbon Management · doi:10.4155/cmt.13.23 · Cited by 368 · see citing works
Lashari, M. S., Liu, Y., Li, L., Pan, W., Fu, J., Pan, G., Zheng, J., Zheng, J., Zhang, X., & Yu, X. (2013) · Field Crops Research · doi:10.1016/j.fcr.2012.11.015 · Cited by 325 · see citing works
Biochars influence seed germination and early growth of seedlings
Solaiman, Z. M., Murphy, D. V., & Abbott, L. K. (2012) · Plant and Soil · doi:10.1007/s11104-011-1031-4 · Cited by 307 · see citing works
The way forward in biochar research: targeting trade‐offs between the potential wins
Jeffery, S., Bezemer, T. M., Cornelissen, G., Kuyper, T. W., Lehmann, J., Mommer, L., Sohi, S. P., van de Voorde, T. F. J., Wardle, D. A., & van Groenigen, J. W. (2015) · GCB Bioenergy · doi:10.1111/gcbb.12132 · Cited by 305 · see citing works
Impact of biochar properties on soil conditions and agricultural sustainability: A review
Al‐Wabel, M. I., Hussain, Q., Usman, A. R. A., Ahmad, M., Abduljabbar, A., Sallam, A. S., & Ok, Y. S. (2018) · Land Degradation & Development · doi:10.1002/ldr.2829 · Cited by 298 · see citing works
Biochar effect on maize yield and soil characteristics in five conservation farming sites in Zambia
Cornelissen, G., Martinsen, V., Shitumbanuma, V., Alling, V., Breedveld, G., Rutherford, D., Sparrevik, M., Hale, S., Obia, A., & Mulder, J. (2013) · Agronomy · doi:10.3390/agronomy3020256 · Cited by 295 · see citing works
Biochar amendment to soil changes dissolved organic matter content and composition
Smebye, A., Alling, V., Vogt, R. D., Gadmar, T. C., Mulder, J., Cornelissen, G., & Hale, S. E. (2016) · Chemosphere · doi:10.1016/j.chemosphere.2015.04.087 · Cited by 292 · see citing works
Güereña, D., Lehmann, J., Hanley, K., Enders, A., Hyland, C., & Riha, S. (2013) · Plant and Soil · doi:10.1007/s11104-012-1383-4 · Cited by 284 · see citing works
Biochar production and applications in agro and forestry systems: a review
Wang, D., Jiang, P., Zhang, H., & Yuan, W. (2020) · Science of The Total Environment · doi:10.1016/j.scitotenv.2020.137775 · Cited by 280 · see citing works
Influence of contrasting biochar types on five soils at increasing rates of application
Streubel, J. D., Collins, H. P., Garcia-Perez, M., Tarara, J., Granatstein, D., & Kruger, C. E. (2011) · Soil Science Society of America Journal · doi:10.2136/sssaj2010.0325 · Cited by 241 · see citing works
Biochar implications for sustainable agriculture and environment: A review
Semida, W. M., Beheiry, H. R., Sétamou, M., Simpson, C. R., Abd El-Mageed, T. A., Rady, M. M., & Nelson, S. D. (2019) · South African Journal of Botany · doi:10.1016/j.sajb.2019.11.015 · Cited by 234 · see citing works
Pandit, N. R., Mulder, J., Hale, S. E., Martinsen, V., Schmidt, H. P., & Cornelissen, G. (2018) · Science of The Total Environment · doi:10.1016/j.scitotenv.2018.01.022 · Cited by 227 · see citing works
Haider, G., Koyro, H.-W., Azam, F., Steffens, D., Müller, C., & Kammann, C. (2015) · Plant and Soil · doi:10.1007/s11104-014-2294-3 · Cited by 209 · see citing works
Jaiswal, A. K., Elad, Y., Graber, E. R., & Frenkel, O. (2014) · Soil Biology and Biochemistry · doi:10.1016/j.soilbio.2013.10.051 · Cited by 203 · see citing works
Biochar amendment increases maize root surface areas and branching: a shovelomics study in Zambia
Abiven, S., Hund, A., Martinsen, V., & Cornelissen, G. (2015) · Plant and Soil · doi:10.1007/s11104-015-2533-2 · Cited by 198 · see citing works
Characterisation, stability, and microbial effects of four biochars produced from crop residues
Purakayastha, T. J., Kumari, S., & Pathak, H. (2015) · Geoderma · doi:10.1016/j.geoderma.2014.11.009 · Cited by 196 · see citing works
Effect of Biochar on Soil Properties, Soil Loss, and Cocoyam Yield on a Tropical Sandy Loam Alfisol
Adekiya, A. O., Agbede, T. M., Olayanju, A., Ejue, W. S., Adekanye, T. A., Adenusi, T. T., & Ayeni, J. F. (2020) · The Scientific World Journal · doi:10.1155/2020/9391630 · Cited by 185 · see citing works
“Other crops such as maize [74], soybean [75], and upland rice [14] have been reported to increase in yield with application of biochar.”
BackgroundPhosphorus availability in soils amended with wheat residue char
Parvage, M. M., Ulén, B., Eriksson, J., Strock, J., & Kirchmann, H. (2013) · Biology and Fertility of Soils · doi:10.1007/s00374-012-0746-6 · Cited by 167 · see citing works
Wijitkosum, S., & Jiwnok, P. (2019) · Applied Sciences · doi:10.3390/app9193980 · Cited by 167 · see citing works
pH effects of the addition of three biochars to acidic Indonesian mineral soils
Martinsen, V, Alling, V, Nurida, N., Mulder, J., Hale, S., Ritz, C., Rutherford, D., Heikens, A., Breedveld, G., & Cornelissen, G. (2015) · Soil Science and Plant Nutrition · doi:10.1080/00380768.2015.1052985 · Cited by 153 · see citing works
Surface albedo following biochar application in durum wheat
Genesio, L., Miglietta, F., Lugato, E., Baronti, S., Pieri, M., & Vaccari, F. P. (2012) · Environmental Research Letters · doi:10.1088/1748-9326/7/1/014025 · Cited by 142 · see citing works
Biochar in the Agroecosystem–Climate-Change–Sustainability Nexus
Nair, V. D., Nair, P. K. R., Dari, B., Freitas, A. M., Chatterjee, N., & Pinheiro, F. M. (2017) · Frontiers in Plant Science · doi:10.3389/fpls.2017.02051 · Cited by 139 · see citing works
Liu, X.-Y., Qu, J.-J., Li, L.-Q., Zhang, A.-F., Jufeng, Z., Zheng, J.-W., & Pan, G.-X. (2012) · Ecological Engineering · doi:10.1016/j.ecoleng.2012.01.016 · Cited by 136 · see citing works
Farmer-led maize biochar trials: effect on crop yield and soil nutrients under conservation farming
Martinsen, V., Mulder, J., Shitumbanuma, V., Sparrevik, M., Børresen, T., & Cornelissen, G. (2014) · Journal of Plant Nutrition and Soil Science · doi:10.1002/jpln.201300590 · Cited by 134 · see citing works
Influence of biochar on nitrogen fractions in a coastal plain soil
Schomberg, H. H., Gaskin, J. W., Harris, K., Das, K. C., Novak, J. M., Busscher, W. J., Watts, D. W., Woodroof, R. H., Lima, I. M., Ahmedna, M., et al. (2012) · Journal of Environmental Quality · doi:10.2134/jeq2011.0133 · Cited by 110 · see citing works
The effect of biochar on plant diseases: what should we learn while designing biochar substrates?
FRENKEL, O., JAISWAL, A. K., ELAD, Y., LEW, B., & GRABER, E. R. (2017) · Journal of Environmental Engineering and Landscape Management · doi:10.3846/16486897.2017.1307202 · Cited by 106 · see citing works
Biochar and manure effluent effects on soil biochemical properties under corn production
Bera, T., Collins, H. P., Alva, A. K., Purakayastha, T. J., & Patra, A. K. (2016) · Applied Soil Ecology · doi:10.1016/j.apsoil.2016.07.011 · Cited by 95 · see citing works
Liao, X., Niu, Y., Liu, D., Chen, Z., He, T., Luo, J., Lindsey, S., & Ding, W. (2020) · Agriculture, Ecosystems & Environment · doi:10.1016/j.agee.2020.107109 · Cited by 75 · see citing works
Pandit, N. R., Mulder, J., Hale, S. E., Schmidt, H. P., & Cornelissen, G. (2017) · PLoS ONE · doi:10.1371/journal.pone.0176378 · Cited by 67 · see citing works
Freitas, A. M., Nair, V. D., & Harris, W. G. (2020) · Frontiers in Sustainable Food Systems · doi:10.3389/fsufs.2020.510982 · Cited by 56 · see citing works
Chen, C.-P., Cheng, C.-H., Huang, Y.-H., Chen, C.-T., Lai, C.-M., Menyailo, O. V., Fan, L.-J., & Yang, Y.-W. (2014) · Geoderma · doi:10.1016/j.geoderma.2014.06.021 · Cited by 56 · see citing works
Biochar-based bioenergy and its environmental impact in Northwestern Ontario Canada: A review
Homagain, K., Shahi, C., Luckai, N., & Sharma, M. (2014) · Journal of Forestry Research · doi:10.1007/s11676-014-0522-6 · Cited by 36 · see citing works
Qurat-ul-Ain, Firdaus-e-Bareen, & Shafiq, M. (2016) · Agriculture, Ecosystems & Environment · doi:10.1016/j.agee.2016.10.027 · Cited by 19 · see citing works
- Authors
- Yamato, M., Okimori, Y., Wibowo, I. F., Anshori, S., & Ogawa, M.
- Affiliations
- Osaka Institute of Technology (JP)
- Corresponding author
- Yamato, Masahide
- ORCID
- Yamato, Masahide
- Venue
- Soil Science and Plant Nutrition
- Publisher
- Informa UK Limited
- Published
- 2006-08
- Volume
- 52
- Issue
- 4
- Pages
- 489-495
- ISSN
- 0038-0768 (ISSN-L)
- 1747-0765
- OpenAlex
- W2131454121
- Cited by
- 634
- References
- 13
- Citations by year
- 2026: 16 · 2025: 28 · 2024: 33 · 2023: 35 · 2022: 36 · 2021: 48 · 2020: 62 · 2019: 42 · 2018: 34 · 2017: 47 · 2016: 38 · 2015: 53 · 2014: 39 · 2013: 37 · 2012: 25
- FWCI
- 6.69
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Soil Science & Plant Nutrition (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Management and Crop Yield
- Keywords
- Acacia mangium, soil amendment, maize yield, cowpea yield, peanut yield, arbuscular mycorrhizal fungi, soil chemical properties, soil pH, cation exchange capacity, exchangeable aluminum, soil carbon sink, wood waste utilization, South Sumatra
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review