Real World Soil Projects

Named current or recent soil / agriculture deployments with outbound URLs. Only projects with verifiable primary or high-quality secondary sources are listed. Marketing claims without documentation are omitted. Companion: Soil and Agriculture · Crop Yield Effects · Biochar Compost and Manure Blends.

Report date: 2026-09-14.

Carbon-credit projects with verified soil end-use

Exomad Green — Concepción / Riberalta, Bolivia (Puro.earth)

• Registry: Puro facility page states CORC 100+ durability; biochar from sawmill hardwood residues pyrolyzed ~600 °C; biochar donated to local Indigenous communities for agricultural soil enhancement (Puro — Exomad Green, Concepción).
• Issuance (facility table on Puro page): 2023 21,252; 2024 58,344; 2025 102,458; 2026 91,457 CORCs (as published on page at fetch time).
• Ag guidance: mix with inoculant; site-specific rates; planting-row / volume-% examples (Exomad biochar).
• Field study (company report with CIAT; press 2025-07-04): Santa Cruz trials, 4 t ha⁻¹ once — corn +15% (up to +32% with fertilizer + microbes); beans +13% (up to +25%) (PDF; Bioenergy International). Yield ANOVA not significant and no fertilizer-only control — see Exomad Green Corn and Bean Field Study.
• MRV partner case study: Carbonfuture — Exomad.

Verification note: Soil end-use is explicit on Puro and company pages (donation / farm application)—not a non-soil-only sink.

Charm Range & Plains Biochar — USA (Isometric)

• Registry project: Charm co-produces bio-oil and biochar (Fort Lupton, CO) from wildfire-mitigation woody biomass; “We transport biochar via truck to various sites where it is sequestered via land application” (Isometric project).
• Crediting period 01 Mar 2024 – 01 Mar 2029; issued volume shown on registry page; storage-site locations reported as secured upon offtake execution.
• Company narrative: partners with farmers for water-stressed soils / productivity co-benefits; first Isometric CCP-labeled biochar credits (Charm blog).
• Soil storage module reference: https://registry.isometric.com/module/biochar-storage-soil-environments/1.3

Verra Project 4679 — “Reignite,” Odisha, India (VM0044)

• First project registered under VM0044 (announced 8 Oct 2024).
• Rural farmers convert agricultural waste (instead of open burning) to biochar used on the same farms as a soil amendment (Verra news).
• Methodology page: https://verra.org/methodologies/vm0044-biochar-utilization-in-soil-and-non-soil-applications-v1-2/

Commercial farms / vineyards (US)

Oasis Vineyard Trial — Monterey County, California

• Partners: Sonoma Ecology Center, UC Riverside, Monterey Pacific Inc., Pacific Biochar; funded via California Department of Water Resources.
• Pre-plant (2016–2017): biochar 10 t/ac, compost 15 t/ac, combo, vs control on sandy low-OM soils; incorporation ~30” in vine row.
• Five harvests: combo +36%, biochar +25%, compost +29% average yield vs control; positive ROI by second harvest; incremental revenue by fifth harvest **$9,752/$12,569 / $14,937\ast \ast peracre(biochar/compost/combo)at$1,500/ton grapes; amendment costs (2016 delivered) biochar $240/ton\ast \ast ,compost\ast \ast$40/ton wet.
• Primary source PDF: https://pacificbiochar.com/wp-content/uploads/Oasis-Vineyard-Trial_-5th-harvest_-Final-Draft_12.12.2023.pdf · vineyard biochar field trial

Dominus Estate — Napa Valley, California

• Pacific Biochar case study: 25 t/ac biochar cultivated to 36” on a 6-acre vineyard redevelopment after fallow; SOM-equivalent design discussion; earthworks fall/winter 2022, profile pit summer 2023.
• URL: https://pacificbiochar.com/case-study-biochar-application-with-dominus-estate-in-napa-valley-after-2-years-fallow/

Sonoma Ecology Center × Napa Recycling — American Canyon pyrolysis (startup 2025)

• 23 Mar 2025 startup of CAL FIRE / Greenhouse Gas Reduction Fund–supported facility converting surplus urban woodchips (A Plus Tree feedstock) to biochar at Napa Recycling; plan to blend with Napa Recycling compost for farm/garden customers (Sonoma Biochar Initiative, 17 May 2025).
• Related SEC biochar program pages: https://sonomaecologycenter.org/biochar/

Earth Foundries × Napa Recycling — composting with biochar

• 2023 project report: 10% (by volume) biochar addition to green/food-waste composting reduced VOCs 33%, accelerated curing, affected finished compost nutrient/salinity metrics (PDF · reports Napa CASP co-composting).

Wakefield BioChar — NRCS CPS 336 channel & paper-mill partnership

• Company overview of NRCS Soil Amendment 336 applications and discounted pricing for qualifying producers: https://wakefieldbiochar.com/learning-center/nrcs-program-and-biochar-overview/
• DS Smith Riceboro, GA paper-mill ash → Wakefield soil products; company cites ~2 tons/acre average farm spreading: https://wakefieldbiochar.com/learning-center/ds-smith-partners-with-wakefield-to-convert-paper-mill-waste-to-useful-biochar/

US programs / demos (practice standard)

• NRCS CPS 336 national standard & FAQ (rates, scenarios, biosolids exclusion): https://www.nrcs.usda.gov/resources/guides-and-instructions/soil-carbon-amendment-ac-336-conservation-practice-standard · https://nrcs-prod.azureedge.us/sites/default/files/2026-04/soil-carbon-amendment-ac-336-faq.pdf · answers CPS 336 planning questions
• Producer funding explainer (American Farmland Trust / Farmland Info hosting USBI-style guide): https://farmlandinfo.org/wp-content/uploads/sites/2/2023/12/biochar_funding_for_US_producers_quick_guide_.pdf
• USBI: https://biochar-us.org/
• Note: publicly cited acreage totals for national EQIP 336 adoption are sparse in primary USDA statistical releases as of this research pass—treat state office reports as the authority when citing acres.

International field deployments (documented)

Location	What	URL
Nepal	Urine-enhanced / liquid-enriched biochar fertilizers; pumpkin trial + 21 multi-crop trials	https://doi.org/10.3390/agriculture5030723 · urine-enhanced biochar field trial · https://doi.org/10.1002/ldr.2761 · liquid nutrient enrichment trials
Brazil (Seropédica)	Biochar on degraded pastures; environmental + CBA	https://doi.org/10.1038/s41598-019-47647-x
Bolivia (Exomad)	Industrial production + farm soil use + yield trials	links above · Exomad Green Corn and Bean Field Study
India (Odisha, Verra 4679)	Farm-waste biochar returned to farms	https://verra.org/verra-registers-first-biochar-project/

Australian mine-spoil and pasture trials exist in the peer-reviewed literature (e.g., acacia–biochar mine rehab DOI); treat as research deployments unless a named commercial operator page is added later.

How to read these cases

1. Credit project ≠ agronomic trial. Exomad/Charm/Verra prove soil sink pathways under MRV; yield numbers need separate trial reports.
2. Vineyard California cases are among the best public multi-year agronomic + economic datasets (Oasis PDF).
3. Composting co-benefits (VOC, curing) are facility metrics—do not equate to field N₂O (GHG Fluxes).
4. Always check feedstock (forest residue, urban wood, ag waste) against local residue-retention rules (NRCS soil carbon amendment in US ag).

Related notes

• Agronomic Economics · Application Rates and Methods · Carbon Markets Hub
• Supply Landscape · Industry Hub · Applications Hub