[https://doi.org/10.1051/ocl/2023024]
[https://doi.org/10.1051/ocl/2024009]
| Issue |
OCL
Volume 31, 2024
Palm and palm oil / Palmier et huile de palme
|
|
|---|---|---|
| Article Number | 14 | |
| Number of page(s) | 2 | |
| DOI | https://doi.org/10.1051/ocl/2024012 | |
| Published online | 03 July 2024 | |
Retraction Notice
Retraction notice: Geospatial assessment of potential land suitability for oil palm (Elaeis guineensis Jacq) cultivation in the western parts of Ethiopia★
OCL 2023, 30, 23 - https://doi.org/10.1051/ocl/2023024
Note de retrait de l’article : Évaluation géospatiale de l’aptitude potentielle des terres à la culture du palmier à huile (Elaeis guineensis Jacq) dans les régions occidentales de l’Éthiopie
1
Department of Fisheries and Aquatic Sciences, Faculty of Agriculture, Wollega University Shambu campus, Shambu, Ethiopia
2
Department of Earth Sciences, College of Natural and Computational Sciences, Wollega University Nekemte Campus, Nekemte, Ethiopia
3
Department of Natural Resource Management, Faculty of Resource management and Economics Wollega University Shambu campus, Shambu, Ethiopia
4
Department of Geography and Environmental studies, Raya University, Maichew, Ethiopia
5
Department of Forestry, College of Natural Resource and Agricultural Economics, Mettu University Bedele Campus, Bedele, Ethiopia
6
Department of Earth Sciences, College of Natural Computational Sciences, Wollega University Nekemte Campus, Nekemte, Ethiopia
7
Department of Geography and Environmental Studies, College of Social Science and Humanities, Wollega University, Gimbi campus, Gimbi, Ethiopia
8
Department of Natural Resource Management, College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia
The original article was published on November 17th 2023: https://doi.org/10.1051/ocl/2023024.
The editors have decided to retract this article for the following reasons:
The authors classified the land suitability related to rainfall as follows: “Previous study by Abubakar et al. (2023b) classified rainfall into four classes: (1329–1420mm), (1420–1490mm), (1490–1560mm) and (>1560mm) and categorizes as highly suitable, moderately suitable, marginally suitable and not suitable, respectively for oil palm tree cultivation”. In oil palm literature (including the cited article by Abubakar et al.), however, the order is reversed. Ideally, oil palm requires >2000mm of well-distributed rainfall per year. The lower rainfall class is still not entirely unsuitable, but there will be a very strong seasonality in production and yields will not be large.
As this misinterpretation affected their entire analysis, the authors have been asked to revise their article accordingly. In the meantime, an expression of concern was published.
In the two successive revised versions received, the authors changed only a few paragraphs (about rainfall...), but they did not re-run their analysis accordingly, nor did they change the suitability assessment at all, leading to the same conclusion as before despite reversed precipitation assumptions.
***
L’article originel a été publié le 17 novembre 2023 : https://doi.org/10.1051/ocl/2023024.
Les éditeurs ont décidé de retirer cet article pour les raisons suivantes :
Les auteurs ont classé l’aptitude des terres en fonction des précipitations comme suit : « L’étude précédente d’Abubakar et al. (2023b) a classé les précipitations en quatre catégories : (1329–1420 mm), (1420–1490 mm), (1490–1560 mm) et (>1560 mm) et les a classées respectivement comme très appropriées, modérément appropriées, marginalement appropriées et non appropriées pour la culture du palmier à huile ». Cependant, dans la littérature sur le palmier à huile (incluant l’article cité de Abubakar et al.), l’ordre est inversé. Idéalement, le palmier à huile a besoin de plus de 2000 mm de précipitations bien réparties par an. La catégorie de précipitations inférieure n’est pas encore totalement inadaptée, mais la production sera très saisonnière et les rendements ne seront pas élevés.
Cette erreur d’interprétation ayant affecté l’ensemble de leur analyse, les auteurs ont été invités à revoir leur article en conséquence. Entre-temps, une expression de préoccupation a été publiée.
Dans les deux versions révisées successivement reçues, les auteurs n’ont modifié que quelques paragraphes (sur les précipitations...), mais ils n’ont pas refait leur analyse en conséquence, ni modifié leur évaluation de l’adéquation de la culture, ce qui les conduit à la même conclusion qu’auparavant, malgré des hypothèses inversées en termes de précipitations.
References
- Abubakar A, Mohd YI, Abu Bakar A, Uddin MK, Umar N. 2023b. Geospatial mapping and biophysical analysis of factors that affect oil palm (Elaeis guineensis) yields in Peninsular Malaysia. J Agrometeorol 25(1): 128–133. [CrossRef] [Google Scholar]
© M.M. Gurmessa et al., Published by EDP Sciences, 2024
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