FolkCarbon methodology : calculation transparency
This page explains how the ratio shown on our B2B invoices and in the simulator is calculated, which sources we use and what limitations apply.
Reference ratio (invoice & simulator)
35.68 t CO₂
sequestered per 1,000 L argan oil (920 kg)
5.11 ha of arganeraie mobilised · Arganeraie Biosphere Reserve (RBA, UNESCO) · sequestration : not certified to date
Marketing display rounded to ≈ 35.7 t. Contractual and calculation value: 35.68 t.
Methodology version : FolkCarbon RBA : juillet 2026
Last revised : July 2026
Per-hectare parameters (reference)
Three published coefficients for the relevant crops. The default invoice / simulator scenario (Afoulki argan) uses 6.98 tCO₂/ha and 180 kg/ha.
Argan
6.98 tCO₂/ha
180 kg/ha · DARED/INRA-Agadir 2025 · n=89
Prickly pear
9.50 tCO₂/ha
40 kg/ha · Nobel 2010 · Chougui 2013 · El Mannoubi 2009
Avocado
11.70 tCO₂/ha
600 kg/ha · Nair et al. 2009 · Dreher & Davenport 2013
Calculation formula
tCO₂ = (litres × 0.920 ÷ yield kg/ha) × sequestration tCO₂/ha
Documented example: 1,000 L × 0.920 ÷ 180 × 6.98 ≈ 35.68 tCO₂ (5.11 ha mobilised · DARED/INRA-Agadir 2025, n=89).
B2B invoice sub-lines (1,000 L example)
Same formula as the simulator (vj7 / Afoulki scenario). The premium appears as a FolkCarbon sub-line on the commercial invoice.
- Organic argan oil 1,000 L · product line
- FolkCarbon premium : sequestration 35.68 tCO₂ × market price (e.g. VCS $15/t → $535.20) · DARED/INRA-Agadir 2025 · 180 kg/ha · 6.98 tCO₂/ha
- Carbon attestation Attached to the invoice : contractual values = calculation above
Scope
- ✓Arganeraie Biosphere Reserve (RBA), Souss-Massa, Morocco
- ✓Measured biomass + soil sequestration (coefficient 6.98 tCO₂/ha for argan)
- ✓Reference yield 180 kg/ha (DARED/INRA field data)
- ✓Out of scope: downstream client transport, packaging, finished product use
Assumptions & limitations
- •Argan reference yield: 180 kg/ha (DARED/INRA-Agadir 2025 measurements)
- •Argan oil density: 0.920 kg/L
- •Argan sequestration coefficient: 6.98 tCO₂/ha (measured biomass + soil, n=89)
- •Attribution documented on invoice : not a certified carbon credit (VCS/Verra in preparation, target 2027–2028)
- •Does not constitute an audited Scope 1/2/3 inventory
- •Annual parameter update planned with INRA
Disclaimer
The FolkCarbon calculation documents CO₂ sequestration per order; it does not constitute an audited Scope 1/2/3 inventory.
Calculation steps (simplified)
1. Ordered volume
Litres of argan oil on the B2B invoice (e.g. 1,000 L).
2. Mass
Litres × 0.920 = kg of oil (e.g. 920 kg).
3. Equivalent area
Mass ÷ 180 kg/ha yield → hectares mobilised (e.g. ≈ 5.11 ha).
4. Attributed tCO₂
Hectares × 6.98 tCO₂/ha → 35.68 t (display ≈ 35.7 t) + carbon-market premium.
Sources & references
- DARED / INRA-CRRA-Agadir 2025 : n=89 direct measurements (argan allometry) : PDF on request
- NEXT-FAO Souss-Massa : argan sector carbon footprint : PDF on request
- ANDZOA : official argan forest carbon stocks : PDF on request
- FolkCarbon site synthesis (official parameters)
- GHG Protocol : GHG accounting framework
- EU CRCF : Regulation (EU) 2024/3012
Integrate FolkCarbon into your purchasing
Request a carbon attestation and calculation breakdown for your next order.