Producer earnings benchmark
Anonymized processor archetypes modeled on live biochar projects in the Puro.earth registry, CDR.fyi, and Frontier offtakes. Revenue = estimated CO₂e removed × the biochar CORC price benchmark.
| Producer (anonymized) | Country | Feedstock | Est. volume | Est. CO₂e removed | Est. credit revenue / yr | Verified via |
|---|---|---|---|---|---|---|
| Cashew processor | Côte d'Ivoire | Cashew shells | ~12,000 t/yr | ~8,100 tCO₂e | ~$1.09M | Varaha VIPP |
| Rice mill | Ghana | Rice husk | ~8,000 t/yr | ~4,800 tCO₂e | ~$648K | Puro.earth registry |
| Sawmill / timber | Kenya | Sawdust | ~5,000 t/yr | ~2,870 tCO₂e | ~$387K | EcoFix Kenya (Puro) |
| Palm kernel processor | Nigeria | Palm kernel shells | ~6,500 t/yr | ~3,990 tCO₂e | ~$539K | Puro.earth method |
| Coconut / copra processor | Côte d'Ivoire | Coconut shells | ~7,000 t/yr | ~4,300 tCO₂e | ~$580K | CDR.fyi snapshot |
| Groundnut processor | Senegal | Groundnut shells | ~4,000 t/yr | ~2,340 tCO₂e | ~$316K | CDR.fyi modeled |
| Coffee mill | Kenya | Coffee husk | ~3,000 t/yr | ~1,760 tCO₂e | ~$237K | Puro.earth registry |
Methodology. Estimated CO₂e removed = annual feedstock volume × ~97.5% availability × ~0.30 biochar yield × feedstock CO₂e factor (2.0–2.31 tCO₂e per tonne biochar). Estimated credit revenue = CO₂e removed × ~$135/t biochar CORC benchmark (Puro Biochar Index, 2024–25). Figures are gross carbon-credit value generated by the feedstock; a producer's take-home depends on the partnership and machine-financing split — model your own on the calculator. Producers are anonymized archetypes based on real, publicly listed projects; no confidential data is shown.
Global biochar field-trial tracker
Peer-reviewed and institutional field results on how biochar changes crop yield and fertilizer demand — filtered to crops and soils relevant to African processors.
| Crop | Region / soil | Biochar treatment | Field result | Year | Source |
|---|---|---|---|---|---|
| Maize | N. Ghana — Guinea Savanna | ½ biochar + ½ compost + ½ chemical fertilizer | +105.7% (2023), +127.4% (2024) yield vs. control | 2025 | Discover Agriculture |
| Maize | Taita Taveta, Kenya | Biochar + organic manure (field-scale) | ~4× yield vs. no inputs | 2021 | B4SS / IBI |
| Rice (irrigated) | Ghana — West Africa | Biochar + inorganic fertilizer | Higher productivity & profitability; reduced fertilizer need | 2020 | MDPI Agronomy |
| Maize | Embu / Kwale / Siaya, Kenya | 1–10 t/ha biochar ± DAP fertilizer | Significant, site-dependent gains on smallholder farms | 2022 | Agron. Sustain. Dev. |
| Maize + groundnut | Guinea Savanna, Ghana | P-enriched biochar-compost (stover + groundnut husk) | Improved P availability & yield | 2023 | Frontiers Env. Sci. |
| Rice | Global meta-analysis | Biochar in paddy systems | Yield increase + lower GHG intensity | 2025 | MDPI Agriculture |
| Maize | Loess Plateau, China | Biochar — soil pore structure + root growth | Higher grain yield via improved rooting | 2024 | Sci. Total Environ. |
| Cross-crop | Global — 367 studies | Biochar application (all rates) | +5–51% yield (avg ~10–16%); SOC +12–102% | 2023–24 | PMC review |
How to read this. Results are reported as published — yield change vs. an untreated control, or vs. the farmer's standard practice. Effects are highly soil- and rate-dependent; the strongest gains consistently come from combining biochar with existing fertilizer or compost rather than replacing it. Entries are drawn from peer-reviewed journals and recognized institutions (links to each primary source).