The product
Biochar — made by Possible Agriculture
Sustainably sourced Australian Sugargum (E. cladocalyx) hardwood, fired at high pyrolysis temperatures and quenched with rainwater. Independently lab-tested at 88.6% total carbon — among the highest carbon content reported in the published biochar literature. Sold by the cubic metre.
- 88.6% NATA-tested carbon
- Sugargum hardwood, Central Victoria
- Powder, 2 mm, or 2–20 mm mix
- Loose by the truckload or palletised
What it does
A single soil amendment that pulls six levers at once.
- ·Increases feed efficiency and reduces enteric methane in ruminants (Leng & Preston)
- ·Improves soil structure, water-holding capacity and nutrient retention (Yu et al., 2013)
- ·Lifts crop yields, particularly in carbon-deficient Australian soils (Joseph et al., 2021)
- ·Stimulates beneficial microbial populations in the root zone
- ·Remediates contaminated soils — heavy metals and PFAS, with site-specific pilot (Sørmo et al., 2021)
- ·Reduces non-CO₂ greenhouse-gas emissions from soils (Joseph et al., 2021)
- ·Builds long-term soil carbon stocks — biochar persists for decades to centuries
- ·Reduces nitrogen and phosphorus leaching from manure and fertiliser (Huang et al., 2020)
How it's made
Made from Australian native trees, in the ancient, traditional way.
Biochar is produced through pyrolysis — converting biomass in a high-temperature, low-oxygen environment into a stable, carbon-rich material that persists in soil for decades to centuries. Pyrolysis removes 70–80% of the biomass weight, creating the pore space that gives biochar its surface area (typically 100 m²/gram).
Charred-biomass soil amendment is not a new idea — the Amazonian terra preta soils are the best-known historical precedent, retaining their fertility centuries on. What's modern is the execution: controlled pyrolysis temperatures, a measured carbon-content output (88.6% NATA-tested), graded particle sizes, and substantially lower emissions than open-fire methods.
Our process uses sustainably sourced Australian Sugargum hardwood at high pyrolysis temperatures, with rainwater activation to maximise pore space and adsorptive ability. Hardwood feedstock + high temperature + water activation = highly adsorptive, acidity-resistant, long-lasting in soil, and supportive of beneficial microbial populations. This profile is what the peer-reviewed PFAS-remediation literature identifies as the most effective combination (Sørmo et al., 2021) .
Storm-ravaged trees and fallen limbs from farms across central Victoria — wood that would otherwise be fire hazards — are carefully slow-cooked in low-oxygen conditions, then quenched with rainwater. The result: a feed-grade activated hardwood biochar with one of the highest carbon contents reported in the literature.
On-farm production
The flame-curtain method
On-farm, our flame-curtain method produces biochar at the lowest cost-per-cubic-metre of any method available in Australia — no $500K+ industrial pyrolysis kiln required. We help farmers convert woody-waste streams into a soil carbon resource on their own land.
See it on YouTubeThree grades
Powder, 2 mm granules, or 2–20 mm mix — depending on the job.
Carbon powder
Fine powder, high surface area
Industrial process, pharmaceuticals, soil reclamation (PFAS, heavy metals, VOCs)
Request a quote
2 mm granules
Uniform 2 mm, dust-reduced
Row crops, potting mix, grasslands, dairy fodder, sports grounds, golf courses
Request a quote
2–20 mm mix
Mixed grade, bulk delivered
Large-scale soil reclamation, water purification, capturing fertiliser runoff
Request a quoteBy audience
Four ways biochar gets used — explore the one that fits your operation.
For
Turf & golf
Less water, better roots, faster recovery.
Application rates, USGA-compatibility framing, pilot trial offers for greens and fairways.
Read more
For
Livestock & dairy
Feed efficiency, weight gain, methane.
0.6–1% of dietary DM for cattle. Up to +2 L/cow/day in an Australian dairy trial.
Read more
For
Councils & parklands
Stormwater, parkland water, carbon.
PFAS and heavy-metal adsorption, stormwater filtration, parkland water savings.
Read more
For
Farmers & feedlotters
Soil carbon, manure, ration.
On-farm composting, manure stabilisation, ration inclusion, ACCU eligibility scoping.
Read more
The promise
Every cubic metre we sell is meant to be these four things.
We don't sell commodity char. Storm-ravaged trees, slow-cooked in low oxygen, activated with rainwater — Australian-made, in the ancient way.
- More sustainable.
- More effective.
- More reliable.
- More pure.
Frequently asked questions
How is Possible Agriculture Biochar different from commodity char or charcoal fines?
Three differences. First, the feedstock — we use sustainably sourced Australian Sugargum hardwood (E. cladocalyx), not waste byproduct from another industrial process. Second, the process — pyrolysis at high temperatures with rainwater activation, which produces the pore space and adsorptive surface area that drives every benefit. Third, the lab numbers — 88.6% total carbon, NATA-accredited test, among the highest reported in the biochar literature.
How is it sold and delivered?
By the cubic metre (m³). Delivered loose by the truckload for bulk applications, or on pallets in 1 m³ bulk bags for smaller orders. Pricing depends on order size and delivery zone — request a quote.
What application rate should I use?
It depends on the use. Turf: 1–2% by volume into the 0–4 cm root zone. Cattle ration: 0.6–1% of dietary dry matter. Poultry, pigs, sheep: 1–2.5% of feed. Soil amendment / row crops: 2–8% by mass. Compost / manure: 5–15% by volume in the windrow before turning. We can talk through what's right for your site.
Can I make biochar on my own farm using your method?
Yes — and on-farm, our flame-curtain method produces biochar at the lowest cost-per-cubic-metre of any method available in Australia, without a $500K+ industrial pyrolysis kiln. Best for farms with woody-waste streams (storm debris, shelterbelt residues, orchard prunings). We can run the process on your property, or train your team to run it. See it on our YouTube channel.
Is the biochar safe for livestock feed?
Yes — at the inclusion rates above. Our product is feed-grade activated biochar made from food-safe Australian hardwood at high pyrolysis temperatures. Published cattle research at 0.6–1% of dietary DM has reported live-weight gain increases and substantial methane reductions. See the research in our library. As with any feed change, we recommend introducing gradually over 7–10 days.
Do you have a minimum order?
Yes — practical minimums depend on whether you're taking loose by truckload (typically 10 m³+) or palletised (1 m³+). Send us the rough volume and your postcode and we'll come back with the most cost-effective option.