An indexed reference library for the biochar community.
25 peer-reviewed papers and industry reports covering biochar in soil, livestock, turf, councils, water filtration, and environmental remediation. Searchable, filterable, downloadable. Free to use.
Why flame-curtain biochar production is the right method for on-farm work
Why this matters for your operation
This is the peer-reviewed paper that underwrites the entire on-farm flame-curtain production method we use. If a council, vet, or auditor asks 'how do you make this and is the process documented?' — this is the answer.
Key finding
Flame-curtain (Kon-Tiki) kilns produce biochar with 76 ± 9% carbon content, comply fully with the European Biochar Certificate quality threshold, and emit significantly less CO and NOx than traditional earth or retort kilns. Capital cost: as low as €30 for a soil-pit kiln versus US$500,000+ for an industrial pyrolysis reactor.
ProcessCarbon
Cornelissen G, Pandit NR, Taylor P, Pandit BH, Sparrevik M, Schmidt HP (2016). Emissions and Char Quality of Flame-Curtain 'Kon Tiki' Kilns for Farmer-Scale Charcoal/Biochar Production. PLoS ONE 11(5): e0154617.
How biochar doubles the water-holding capacity of sandy soils
Why this matters for your operation
If you've ever been told biochar holds 'three times' or 'five times' its weight in water — this is the peer-reviewed paper that actually pinned the number down. It's the source we use whenever water-holding comes up on quotes and pitches, and it's the strongest evidence for biochar in sandy or sandy-loam soils.
Key finding
Pure biochar holds over 2.7× its dry weight in water. Adding biochar at 9% by mass to a loamy-sand soil doubles the soil's overall water-holding capacity. Effects are smaller in already-heavy soils.
SoilWaterTurf
Yu OY, Raichle B, Sink S (2013). Impact of biochar on the water holding capacity of loamy sand soil. International Journal of Energy and Environmental Engineering 4:44.
When biochar works, when it doesn't — the comprehensive review
Why this matters for your operation
The most authoritative single review on biochar in soils — covers what works, what doesn't, and why. If a council, agronomist or auditor wants 'one paper' to read, this is it. We use the headline numbers from this paper across the website.
Key finding
At 1% biochar application: 10–42% increase in plant productivity, up to 4.6× plant-available phosphorus, 12–50% reduction in non-CO₂ GHG emissions (N₂O + CH₄), and 17–39% reduction in plant tissue heavy-metal concentrations.
SoilCarbonProcess
Joseph S et al. (2021). How biochar works, and when it doesn't: A review of mechanisms controlling soil and plant responses to biochar. GCB Bioenergy 13(11): 1731-1764.
How activated biochar locks up PFAS in contaminated soils
Why this matters for your operation
If a council, a fire station, or an airport is trying to figure out what to do about PFAS contamination on a site, activated biochar is the most cost-effective stabilisation option available. This is the peer-reviewed source we cite when PFAS comes up in a procurement conversation.
Key finding
Activated biochar at 5% application reduced PFAS leaching by up to 98–100% in low-organic-matter soils. Performance reduces in soils with high organic matter — a site-specific pilot trial is recommended for any contaminated-site remediation.
PFASWaterCouncils
Sørmo E, Silvani L, Bjerkli N, Hagemann N, Zimmerman AR, Hale SE, Hansen CB, Hartnik T, Cornelissen G (2021). Stabilization of PFAS-contaminated soil with activated biochar. Science of the Total Environment 763, 144034.
Western Australian dairy trial — biochar from cow to dung beetle to soil
Why this matters for your operation
If you've got cattle and a paddock, this is the most elegant Australian biochar system in the literature. Cattle eat biochar with molasses, dung beetles bury the resulting nutrient-loaded dung into the soil profile, you get pasture improvement and stable soil carbon — all without spreading anything yourself.
Key finding
Three-year field study on a 53-ha Western Australian farm: feeding cattle high-temperature wood biochar mixed with molasses, then letting dung beetles incorporate the excreted material into the soil profile, improved soil properties, lifted pasture health, and increased farmer net returns. The biochar's stable carbon structure survives the digestive process intact.
LivestockSoilCarbon
Joseph S, Pow D, Dawson K et al. (2015). Feeding Biochar to Cows: An Innovative Solution for Improving Soil Fertility and Farm Productivity. Pedosphere 25(5): 666-679.
25% live-weight gain and 41% methane reduction in cattle
Why this matters for your operation
The published evidence base for biochar in cattle rations. Numbers strong enough to underwrite a serious feed-additive trial — and the trial design is well-documented enough that you can replicate it. The 22%/41% methane reductions are particularly compelling for any feedlot or dairy operator with emissions exposure.
Key finding
Biochar at 0.6% of dietary dry matter increased live-weight gain by 25% and improved feed-conversion ratio from 23.2 to 19.1. Enteric methane reduced by 22% from biochar alone, and 41% when combined with potassium nitrate as a non-protein nitrogen source.
Livestock
Leng RA, Preston TR (2012). Biochar reduces enteric methane and improves growth and feed conversion in beef cattle fed cassava root chips. Livestock Research for Rural Development 24(11):199.
2 L/cow/day milk yield from biochar in a four-dairy Australian trial
Why this matters for your operation
The first Australian dairy trial with serious milk-yield numbers from biochar. One of four dairies in the trial saw around +2 L/cow/day at ~1% inclusion in the mixed ration — which on a 250-cow herd works out to roughly $130k/year in additional profit. If you're running a dairy, this is the trial to read.
Key finding
At one of four South Australian dairies, biochar at ~1% of mixed ration produced approximately +2 L/cow/day milk yield, +0.1 kg/day in solids, and ~$130,000/year additional profit on a 250-cow herd. Trial used Mara Seeds Biochar.
Livestock
Rebbeck M (2023). Mara Seeds Biochar dairy trial across four South Australian dairies.
45% grape yield increase in a Californian Pinot Noir vineyard trial
Why this matters for your operation
If you're running a vineyard, an orchard, or any high-value perennial crop on sandy soil, this trial is the strongest economic case for biochar in the literature: the amendment paid for itself in a single harvest.
Key finding
Biochar at 10 tons/acre on a Pinot Noir vineyard with sandy soil produced a 45% yield increase in the first harvest (+1.3 ton/acre, +6 clusters/vine). Revenue uplift of US$2,600/acre against a biochar cost of US$2,400/acre — paid back in one season.
Soil
Oasis Vineyard biochar field trial, write-up 15 July 2020. California Healthy Soils Program trial site.
The terra preta concept — why compost and biochar are stronger together
Why this matters for your operation
If you're running a composting operation — manure stream, kerbside green waste, anything organic — adding biochar to the windrow holds the nitrogen that would otherwise volatilise as ammonia. This is the foundational paper that mapped the whole compost+biochar interaction.
Key finding
Biochar amendment in poultry-litter composting reduces ammonia emissions by up to 64% and total nitrogen losses by up to 52%. Compost+biochar combinations underwrite the 'terra preta' approach — long-term stable carbon plus immediate compost nutrient value.
CompostSoilCarbon
Fischer D, Glaser B (2012). Synergisms between Compost and Biochar for Sustainable Soil Amelioration. In: Management of Organic Waste. InTech.
Cool-fire burns produce 1.7× the soil carbon of unburnt control sites
Why this matters for your operation
Empirical evidence that low-temperature, slow-burn fire regimes leave substantially more carbon in the soil than high-intensity hazard-reduction burns. The same combustion principle that the flame-curtain biochar method controls for at production scale.
Key finding
Trial site on the NSW South Coast: 6.5 ± 0.4% soil organic carbon under cool-fire (cultural) burns, versus 3.8 ± 0.4% on unburnt controls and 4.3 ± 0.4% on agency-led prescribed burns. Nitrogen stocks 1.6× the unburnt baseline. The mechanism: lower fire temperatures preserve char in the soil profile rather than combusting it to CO₂.
SilvacultureCarbonSoil
Murramarang Country, Davis J, Simmons J, Snelson S, Channell V, Haynes K, Deutscher N, Brook L, Dosseto A (2024). Quantitative Assessment of the Effect of Agency-Led Prescribed Burns and Cultural Burns on Soil Properties in Southeastern Australia. Fire 7(3): 75.
How biochar reduces nitrogen and phosphorus leaching from soils
Why this matters for your operation
If you're spending money on fertiliser, biochar at 4–8% by mass cuts the nitrogen losses by a quarter to a third — that's money staying on your paddock instead of leaching into the groundwater or running into the dam. Also relevant for councils worried about runoff into waterways.
Key finding
At 2–8% biochar in soil: 17.6–37.7% reduction in total nitrogen leaching, 12.0–26.0% reduction in total phosphorus leaching. Optimal: 8% by mass for nitrogen control, 2% by mass for phosphorus.
SoilWaterCouncils
Huang Z et al. (2020). Effects of biochar application on soil leaching of nitrogen and phosphorus. IOP Conference Series: Earth and Environmental Science 424, 012015.
The Australian biochar value report — industry-level overview
Why this matters for your operation
The industry-level overview document. Useful for anyone who wants the policy and economic case for biochar at an Australian-market level — councils evaluating biochar against alternatives, government grant assessors, journalists. Not the paper for the headline numbers, but the paper to point at when 'is biochar a real thing in Australia?' comes up.
Key finding
Industry overview of biochar production and use in Australia and New Zealand, with economic, agronomic, and carbon-market context. Covers wood vinegar (a pyrolysis byproduct) and its complementary value streams.
SoilProcessCarbon
Australia and New Zealand Biochar Industry Group (2020). A Report on the Value of Biochar and Wood Vinegar v1.2.
Engineered biochar for soil and water contaminant removal
Why this matters for your operation
If you're scoping a remediation project — heavy metals, PFAS, hydrocarbons — this is the review that tells you which biochar modification actually works for your contaminant. Not all biochars are equivalent for remediation; this paper makes the selection rational.
Key finding
Engineered biochar modifications (acid/base treatment, steam activation, magnetic loading, mineral impregnation) produce sorption-capacity improvements of 5–20× over unmodified biochar, depending on the target contaminant. For lead specifically, H₂O₂-oxidised biochar achieved 20× the sorption capacity of unmodified char.
PFASWaterSoil
Rajapaksha AU, Chen SS, Tsang DCW, Zhang M, Vithanage M, Mandal S, Gao B, Bolan NS, Ok YS (2016). Engineered/designer biochar for contaminant removal/immobilization from soil and water. Chemosphere 148: 276-291.
USGA putting-green construction principles (the document we cite)
Why this matters for your operation
This is the document people are pointing at when they say 'USGA approved'. Read it: biochar is not mentioned once. We use it as evidence for why we say 'compatible with USGA construction principles' rather than 'USGA approved' — because no one has ever approved biochar specifically. Honest framing wins the procurement conversation.
Key finding
USGA's official guidance on putting-green construction — sand particle-size distribution, drainage characteristics, root-zone media specifications. Biochar is not mentioned in the 2018 revision; products claiming 'USGA approval' for biochar amendments are misrepresenting the document.
Turf
USGA Green Section Staff (2018). USGA Recommendations for a Method of Putting Green Construction.
How biochar doubles soil carbon stocks in trial paddocks
Why this matters for your operation
Biochar persists in soil for decades to centuries. This trial data is what underwrites the 'long-term soil carbon' framing — including for any farmer thinking about participating in ACCU schemes. Carbon you build with biochar stays built.
Key finding
Field measurements showing biochar amendments approximately double measured soil-carbon stocks in the treated layer over the trial duration. Effect persists across the measurement period — biochar does not decompose on agricultural timescales.
CarbonSoil
Field trial data, biochar 2× soil carbon measurements.
How activated biochar reduces lead leaching by 99% in contaminated shooting-range soils
Why this matters for your operation
Contaminated sites — shooting ranges, fire training grounds, old industrial yards — usually have multiple contaminants in the same soil. This paper proves activated biochar handles PFAS, lead and antimony simultaneously. The 99% lead reduction is the strongest single result in the contaminated-site literature.
Key finding
Iron-enriched designer biochar at 20% application reduced lead leaching by 99% and antimony leaching by 40% in shooting-range soil. Coconut-shell activated biochar at 1% application reduced PFOS leachate by >96% in both low- and high-organic-matter soils. Different biochars for different contaminants — the matching matters.
PFASSoilWater
Silvani L, Cornelissen G, Smebye AB, Zhang Y, Okkenhaug G, Zimmerman AR, Thune G, Sævarsson H, Hale SE (2019). Can biochar and designer biochar be used to remediate PFAS, lead and antimony contaminated soils? Science of the Total Environment 694, 133693.
Biochar as a feed supplement for poultry, pigs, and ruminants
Why this matters for your operation
If you're running poultry, pigs, or sheep — this is the source for species-specific feed-additive guidance. The 1–2.5% inclusion rate range for non-cattle animals comes from here. Less well-known than the cattle work, but practical and well-evidenced.
Key finding
Reviews biochar inclusion across animal classes — poultry, pigs, sheep, cattle. Inclusion rates of 1–2.5% of feed for non-cattle species. Effects include reduced odour in manure, improved feed conversion, reduced mycotoxin loading, and immune-system support.
Livestock
Use of biochar as feed supplements for animal farming. Animal nutrition review.
Biochar-compost amendments increase bentgrass growth on simulated golf greens
Why this matters for your operation
Direct turf-trial evidence. If you're a superintendent evaluating biochar for greens reconstruction or top-dressing, this is the paper that shows the amendment actually works on the grass species you care about — without compromising the drainage profile USGA construction depends on.
Key finding
Biochar-compost mixtures added to simulated USGA-spec golf greens increased creeping bentgrass (Agrostis stolonifera) growth while maintaining the high water-infiltration and drainage rates required for sports turf. The amendment improved water and nutrient retention in the 30 cm sand root zone.
TurfSoil
Vaughn S, Dinelli D, Vaughan M, Peterson S. Biochar-compost mixtures added to simulated golf greens increase creeping bentgrass growth. USDA Agricultural Research Service trial.
If you already run a composting program — for manure, green waste, or a council kerbside collection — adding biochar to the windrow before turning is the single highest-leverage move you can make. Lower odour, less N volatilisation, more stable nutrient profile in the final product. This is the synthesis paper that lays out why.
Key finding
Combining biochar with compost (5–15% biochar by volume in the windrow) reduces nitrogen volatilisation, captures phosphorus that would otherwise leach, reduces odour, and produces a slower-release, more biologically active final compost. The compost-biochar combination outperforms either input alone.
CompostSoil
International Biochar Initiative. Compost and biochar — combined value in soil amendment.
Turning a shelterbelt into a biochar production stream
Why this matters for your operation
Wilson is one of the practical voices in farm-scale biochar production. If you've got a shelterbelt that needs management — or storm-debris piling up after every weather event — this is the reference for the on-farm production approach. Practical, hands-on, not academic.
Key finding
Documents the conversion of shelterbelt and woody-waste biomass into biochar using on-farm flame-curtain methods. Covers feedstock preparation, kiln operation, yield expectations, and integration with grazing or cropping operations.
Process
Wilson K (2018). Converting shelterbelt to biochar — practical guide.
The veterinary perspective on biochar in animal feed
Why this matters for your operation
If a vet, feed-mill operator, or feedlot nutritionist asks 'is biochar safe to put in the ration?', this is the paper to send them. Comprehensive coverage of inclusion rates, safety, mycotoxin binding, and the published efficacy data.
Key finding
Comprehensive veterinary review of biochar as a feed additive. Confirms safety at recommended inclusion rates, identifies mycotoxin-binding as a key mechanism alongside the methane-reduction and feed-conversion effects. No adverse effects reported within recommended dosing ranges.
Livestock
The use of biochar in animal feeding. Animal nutrition review.
Biochar as a bulking agent for poultry-litter composting
Why this matters for your operation
If you run a chicken operation, the litter is both a problem and an under-used asset. Biochar in the windrow at 10–20% by volume stabilises the nitrogen, holds the phosphorus, and dramatically cuts the smell. The final compost is more biologically active and slower-release than litter alone.
Key finding
Biochar at 10–20% by volume in poultry-litter compost substantially reduces nitrogen loss (volatilisation + leaching) and odour. The finished compost shows improved nutrient profile, higher microbial activity, and slower-release nutrient availability compared to litter-only compost.
CompostLivestockSoil
Biochar as bulking agent for poultry litter composting — research review.
Useful as a citation set when you're writing a council brief, a grant application, or an ACCU project document and need the full evidence base in one place rather than chasing individual papers.
Key finding
Compiled reference list of peer-reviewed work on biochar–compost combinations from the International Biochar Initiative. Useful as the citation source for council briefs, ACCU project documents, and grant applications that need to demonstrate broad evidence base.
CompostSoil
International Biochar Initiative. Compost and biochar — reference compilation.
Bench-scale lab data — biochar-compost combination ratios
Why this matters for your operation
Practical for designing a trial on your own property. The lab data here tells you what to expect at different biochar inclusion rates in your compost, so you can set realistic targets and measurement points before you commit equipment or paddock area.
Key finding
Quantitative bench-scale measurements of nitrogen retention, microbial activity, and nutrient release profile across biochar inclusion rates in compost. Useful baseline data for designing on-farm composting trials and setting expectations against the data.
CompostSoil
Compost-biochar combination — bench-scale lab test data.
Biochar plus salt-tolerant bacteria rescues vineyard soils from salinity
Why this matters for your operation
Salinity is the slow-killer for vineyards, orchards and pastures across large parts of inland Australia. This paper shows biochar's porous structure is the missing piece that lets beneficial bacteria actually colonise a salt-stressed root zone and stay there.
Key finding
Co-applying biochar with the salt-tolerant bacterium Pseudomonas resinovorans B9 reshaped the vineyard rhizosphere community, enriched beneficial bacteria (Bacillus, Pseudomonas, Staphylococcus, Flavobacterium), and produced the most pronounced positive correlation rate (67.69%) in microbial network analysis. Result: improved grape shoot growth, reduced soil salinity, and lifted P and K levels in plants and soil.
Soil
Li Y et al. (2025). Co-application of biochar and salt-tolerant bacterial inoculants on vineyard saline-alkaline soils. Environmental Technology & Innovation 38, 104070.
We've indexed the peer-reviewed evidence base for biochar in agriculture, livestock, turf, councils, water filtration and environmental remediation — and made it free for the wider biochar community to use. Searchable by topic and audience. Downloadable. Cited in every page on this site.
