Articles | Volume 9, issue 1
Review article
21 Feb 2023
Review article |  | 21 Feb 2023

Quality assessment of meta-analyses on soil organic carbon

Julia Fohrafellner, Sophie Zechmeister-Boltenstern, Rajasekaran Murugan, and Elena Valkama

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Cited articles

Acutis, M., Tadiello, T., Perego, A., di Guardo, A., Schillaci, C., and Valkama, E.: EX-TRACT: An excel tool for the estimation of standard deviations from published articles, Environ. Model. Softw., 147, 105236,, 2022. 
Aguilera, E., Lassaletta, L., Gattinger, A., and Gimeno, B. S.: Managing soil carbon for climate change mitigation and adaptation in Mediterranean cropping systems: A meta-analysis, Agr. Ecosyst. Environ., 168, 25–36,, 2013. 
Angers, D. A. and Eriksen-Hamel, N. S.: Full-Inversion tillage and organic carbon distribution in soil profiles: A Meta-Analysis, Soil Sci. Soc. Am. J., 72, 1370–1374,, 2008. 
Aksnes, D. W., Langfeldt, L., and Wouters, P.: Citations, Citation Indicators, and Research Quality: An Overview of Basic Concepts and Theories, Sage Open, 9,, 2019. 
Bai, X., Huang, Y., Ren, W., Coyne, M., Jacinthe, P.-A., Tao, B., Hui, D., Yang, J., and Matocha, C.: Responses of soil carbon sequestration to climate-smart agriculture practices: A meta-analysis, Glob. Chang. Biol., 25, 2591–2606,, 2019. 
Short summary
The number of meta-analyses in agriculture and soil sciences is continuously rising, but they are often of poor quality. We quantitatively analyzed the quality of 31 meta-analyses studying the effects of different management practices on soil organic carbon (SOC). We found that only one meta-analysis on no tillage/reduced tillage obtained a high score. New or improved meta-analyses on the effects of organic agriculture, biochar, fertilization, and crop diversification on SOC are urgently needed.