GBRS Ltd Agricultural Grade Compost

Growing Beds Recycling Services Ltd (GBRS) manufacture, a 0-30mm agricultural grade soil improver product “compost”. It is manufactured to BSI PAS100:2018 and is compliant with the Defra Compost Quality Protocol.Scientific research carried out on the use of this product in agriculture has demonstrated the following key benefits:

  • Increased soil organic matter – This is by far the most valuable benefit of compost use in agriculture as no other organic manure contains more organic matter per tonne (typically 30% as received).  Soil organic matter is the key to functional, living soils and without it crops cannot be grown in an environmentally sustainable or economically efficient way.


  • Useful quantities of P, K, Mg, S and trace elements – Our soil improver contains high quantities of readily available phosphate and potash as well as other trace elements essential for healthy plant growth.  There is normally sufficient available P and K to substitute the application of bagged fertiliser for the first crop following application. This fertiliser value can be worth more than £250/Ha to certain crops; especially to vegetable crops on sandy textured soils.


  • A useful quantity of water-soluble N with a slow release over time – typically 25kg available to the crop in year 1 if applied at the NVZ field limit of 500kg/Ha every 24 months.


  • Increase in soil water holding capacity – By increasing soil organic matter and reducing the soil bulk density the soil ability to hold moisture in the root zone is significantly increased.  With our climate getting warmer, the conservation of water on our farms is already a big issue, particularly in low rainfall areas like the east of England. 


  • Improved soil structure – Soil becomes more friable and soil cultivations become easier, reducing fuel consumption, the number of cultivation passes and valuable time.


  • Higher yielding crops – Long term scientific field trials have demonstrated that repeated application of BSI PAS100 soil improver can increase crop yields by as much as 7%.

To find out more download our latest Agricultural Benefit Statement here.

Agricultural Benefits Statement

Compost is able to supply 18 tonnes of organic matter per hectare in an application of 65 t/ha. This feeds the worms and microorganisms in the soil, which in turn build soil structure and hence improve water holding capacity and aeration. Soil becomes more friable and soil cultivations easier, reducing fuel consumption, the number of cultivation passes and your time. This leads to reduced soil bulk density, less compaction and improved water infiltration.

Although not yet fully quantified the use of compost in arable farming may also be an effective way to sequester carbon, storing it in the soil instead of releasing it to the air. This practice has the potential to help offset the carbon footprint of one of the largest sources of greenhouse gases in the world.

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