TerrAffix biochar additive – land remediation

TerrAffix sprayed onto subsoilRapidly established growth using HydraCX just below the railway lineFibres up closeTerrAffix applied to Type 1 fill material on A11 SuDs projectA11 drainage channels vegetatingClose up of 6F2 fill material on M25Hydraulic seed rig spraying HydraCX with TerrAffix onto a 45° slopeVegetation September 2010
Rapidly established growth using HydraCX just below the railway line

TerrAffix™ biochar is a natural product which is used to stabilise and restore degraded soils. Salix use TerrAffix systems as they provide plants with essential nutrients whilst actively reducing pollutants in the soil and locking in carbon.

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TerrAffix is made in Wales, from sustainably managed UK woodlands combined with organic certified materials, unlike many biochars which are made using African or South American woods and not always from sustainable sources.

Used in conjunction with our HydraCX system it ensures an extremely rapid establishment of plants, even on the most depleted of soils. It also assists in getting the soil ecosystem functioning.

TerrAffix can be used on land remediation projects where heavy metals and other contaminants are present. A cost-effective approach to regenerating brown field sites.

TerrAffix-Swale solves the environmental problems associated with establishing vegetation within roadside and attenuation swales:

  • Roadsides with poor soil, including high silt, clay or compacted aggregate content which need soil improvement
  • Low porosity of soil due to compaction exacerbating standing water and poor drainage
  • Historical difficulty in establishing vegetation on saturated soil or where there is temporary flowing water
  • Attenuation swales with high levels of soil contamination due to runoff from roads, road building and construction sites
  • Highway drainage discharges with hydrocarbons, salt and other road pollutants reaching soakaways and settling ponds which pollute the water
  • Areas requiring heavy metal remediation

TerrAffix-Rail has been specially formulated to solve environmental problems associated with the types of embankments found near railways:

  • Steep slopes of more than 33° requiring bank stabilisation
  • Unvegetated, dry slopes needing erosion prevention and slippage control
  • Crushed Type-1 aggregate or 6F2 fill commonly used on railway embankments needing topsoil or grassy vegetation cover
  • Poor or limited soil with few nutrients and minerals to sustain plant growth or functioning ecosystems
  • Low levels of organic matter
  • Neutral to alkaline soil requiring soil treatment
  • Poor land drainage leading to flooding and erosion
  • Poor water filtration and too little moisture absorption for plant life to thrive

TerrAffix-Verge has been specially formulated to solve environmental problems associated with verges:

  • Soil erosion on reclaimed areas including verges and recreation sites
  • Soils disturbed during construction
  • Land slippage weakening the overall structure of a slope
  • Verges created from aggregate sub-base or reclaimed soils unable to sustain vegetation cover
  • Little or poor vegetation cover on verges leading to poor drainage and the increased risk of flooding
  • Invasive plant species making it difficult to establish vegetation beneficial to a sustainable ecosystem
  • Neutral to alkaline soil requiring soil treatment

TerrAffix-Mine solves the common environmental problems associated with areas of industrial metalliferous pollution:

  • Cold, acidic free-draining soils with low levels of nutrients, minerals and trace elements
  • Areas with little soil cover or very poor soils mixed with metal rich spoil
  • Areas such as former colliery sites which, whilst not officially “contaminated”, have very poor soil conditions and are prone to erosion, compaction, gullying and sparse vegetative cover
  • Sites where conventional capping is not possible due to accessibility or cost
  • Vegetation is contaminated by mining pollution on livestock grazed sites
  • Mobilisation and bioaccumulation of heavy metals within the vegetation, such as copper, nickel, lead and zinc
  • Industrial pollution entering the wider environment due to the lack of a soil cover, exposure and erosion by wind and water

We use this in conjunction with TerraRhizae, a combination of 9 different types of endomycorrhizal fungi, critical to the establishment of vegetation on substrates low in available mineral nutrients such as engineered sub-base and sub-soils .

By using this product you are investing in the soil ecosystem, which means much better and functioning soil over the long-term. Better functioning soils improve the local habitats and environment.

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