Biochar-Based Fertilizer Meta-analysis
Citation: Melo LCA, Lehmann J, Carneiro JSS, Camps-Arbestain M (2022). Biochar-based fertilizer effects on crop productivity: a meta-analysis. Plant and Soil 472(1–2): 45–58. https://doi.org/10.1007/s11104-021-05276-2
What it is: A meta-analysis of biochar-based fertilizers compared with conventional fertilization. The vault uses it as evidence that nutrient-enriched biochar works at low rates.
Key figures
None of these could be checked. The paper is paywalled, and no abstract was available from Crossref, Semantic Scholar, OpenAlex, or Europe PMC.
| Figure | Value used in the vault | Where | Check |
|---|---|---|---|
| Productivity vs fertilized controls | +10% | DOI | not re-checked |
| Productivity vs unfertilized controls | +186% | DOI | not re-checked |
| Pairwise comparisons | 148 | DOI | not re-checked |
| Mean biochar-based fertilizer rate | 0.9 t ha⁻¹ | DOI | not re-checked |
Use with care
- Treat these four numbers as unconfirmed until someone with access checks the paper. They appear in Biochar Inoculation for Fertilizer, Biochar Nutrients and Fertilizer Chemistry, Soil and Agriculture, and Crop Yield Effects.
Related: liquid nutrient enrichment trials · meta-analyzes yields with fertilizer controls · Key Sources