Mark Gibbens

Biochar is a stable, carbon-rich material produced by pyrolysis of biomass under limited oxygen. Its unique physical and chemical properties, including high porosity, large internal surface area, persistent carbon structure and ability to host microbial communities, make it a valuable amendment in greenhouse and nursery growing systems.
As horticulture and agriculture move away from peat, biochar is becoming one of the most valuable materials for replacing some of the functions peat traditionally provided in growing media and soil conditioners.
All soils begin as mineral material and gradually develop into living biomes through the addition of carbon, water, and microbial/fungal processes. This living biome needs to be nurtured just like any other living thing on our planet that is where Biochar comes into its own.
Biochar produced from fully traceable feedstock, managed end-to-end through clearance, processing and production.
At Knighton Countryside Management, this sits within a circular approach to land management. Where vegetation clearance is processed into clean biomass, converted into biochar and returned back into the ground to support long-term performance.
This creates a closed-loop system, turning low-value material into a high-performance input that supports both environmental and commercial outcomes.
Biochar is often associated with soil improvement, but its real value lies in how it can be applied across entire systems, not just a single stage of a project or operation.
When used effectively, it enhances water retention, aeration, root development, nutrient holding and soil microbiology. Supporting stronger, more resilient ground performance across a wide range of applications.
Where It Applies
Within our work, biochar is being explored and applied in areas including:
Land & Infrastructure
Soil structure improvement and moisture retention, supporting vegetation establishment in challenging environments, integration into hydroseeding systems and use within landscaping and environmental mitigation works.
Carbon & Sustainability
Long-term carbon storage within soils, supporting wider carbon and ESG strategies, and improving resource efficiency across projects.
Agricultural & Land-Based Systems
Improving soil fertility and pasture productivity, enhancing nutrient retention and reducing losses and supporting regenerative land management approaches.
In agricultural systems, particularly dairy farming, biochar can be used across the full operational cycle. From bedding and manure management through to composting and soil application. Improving efficiency at each stage while contributing to long-term soil health and carbon storage. The key is not the material alone, but how it is integrated into real-world applications. Our focus is always on practical delivery, understanding where biochar adds value and ensuring it is applied effectively on site.
Delivered through a partnership you already trust.

We work in partnership with InnovaGen, a UK-based specialist in advanced biochar production and carbon sequestration technologies.
Their ultra-slow pyrolysis process produces a consistent, high-quality biochar from clean, traceable biomass designed for long-term carbon storage and reliable performance.
Innovagen focus on producing the material. Our role is to take that material and make it work on site.
Through our experience in land management, hydroseeding, planting and environmental works, we integrate biochar into live projects in a way that is practical, effective and commercially viable.
This combined approach allows us to offer a complete solution from material sourcing through to specification, application and delivery.
All enquiries, specification support and project discussions are handled directly by Knighton Countryside Management.
Carbon Drives the System
Biochar acts as a stable carbon store, supporting long-term carbon retention while improving how soil and growing media function.
At the centre of this is the Carbon:Nitrogen (C:N) balance:
Carbon provides energy for soil biology • Nitrogen regulates growth
When carbon is low:
Soil becomes unstable • Nutrients are lost more quickly • Systems rely on repeated inputs
When carbon is balanced:
Microbial activity stabilises • Nutrients are released gradually • Soil begins to regulate itself
Carbon isn’t just a component; it’s what drives and makes the system work.




Biochar acts as a microbial habitat. Its porous structure shelters:
This improves:
Peat is largely biologically inactive, while biochar can support living soil systems.

Biochar has a high cation exchange capacity (CEC). This means it can hold nutrients such as:
Biochar benefits:
Peat has a limited nutrient-holding ability compared to biochar.

Biochar has a highly porous structure similar to a sponge.
This mimics one of the key roles peat used to provide in potting media.


Improves Aeration & Drainage
Biochar particles introduce stable pore structure into peat, coir, bark, and wood fibre substrates. This improves root-zone oxygenation, reduces waterlogging risk, and supports healthier root development.
Increased Water-Holding Capacity
Biochar micropores retain plant-available water, promoting more uniform mois
Improves Aeration & Drainage
Biochar particles introduce stable pore structure into peat, coir, bark, and wood fibre substrates. This improves root-zone oxygenation, reduces waterlogging risk, and supports healthier root development.
Increased Water-Holding Capacity
Biochar micropores retain plant-available water, promoting more uniform moisture distribution and reducing irrigation frequency.
Reduced Substrate Shrink & Compaction
Unlike degradable organic matter, biochar resists decomposition and maintains long-term structural stability.

Microbial inoculants such as AgrAssure Bacteriolit introduce beneficial fungi and bacteria that improve nutrient uptake, root development, and disease resistance. Biochar significantly enhances their effectiveness by providing protected habitat and reducing microbial washout.

Nutrient Retention & CEC
Biochar significantly increases cation exchange capacity (CEC), improving retention of ammonium, potassium, calcium, magnesium, and trace elements.
pH Buffering
Most hardwood-derived biochars exhibit neutral to mildly alkaline pH behaviour, enhancing substrate stability.
Enhanced Fertiliser Efficiency
Improved nutrient
Nutrient Retention & CEC
Biochar significantly increases cation exchange capacity (CEC), improving retention of ammonium, potassium, calcium, magnesium, and trace elements.
pH Buffering
Most hardwood-derived biochars exhibit neutral to mildly alkaline pH behaviour, enhancing substrate stability.
Enhanced Fertiliser Efficiency
Improved nutrient retention and moderated release reduce fertiliser losses and improve plant nutrition consistency.
We can help you plan the right approach.
Unit 37, Enterprise Park Piddlehinton Dorchester, Dorset DT2 7UA
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