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Making Biochar Compost

Posted by: Arthur’s Point Farm

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June 28, 2021

We use biochar to enhance soil structure, foster beneficial microbes, and fight climate change. We start with pure charcoal produced in our Exeter Retort Kiln using sustainably harvested wood from our forest land and scrap wood from our local mill, Ghent Wood Products. The wood is converted into pure charcoal via a thermochemical conversion process, called pyrolysis, at around 450 degrees C for about eight hours.

Example of biochar, the material used in our biochar agroforestry research project

Each batch is then weathered and chipped into smaller particles before the biochar is mixed into to fresh windrows of manure, hay, and vegetable food scraps from a local fermented food manufacturer in Hudson, called Hawthorne Foods. As the compost matures, the biochar is inoculated with beneficial microorganisms and saturated with moisture. When added to the soil, the biochar enhances soil structure, porosity, and water-holding capacity, creates habitat for beneficial soil microbes to support vigorous plant growth, and sequesters carbon in the soil for thousands of years. 

We produce an easy-to-use product for adding biochar to your soil. Our Probiotic Biochar Soil Amendment contains 50% pure biochar and a 50% microbial soil inoculant, designed to sustain long-term plant and soil health. The microbial soil inoculant contains beneficial mycorrhizal spores and soil bacteria, with a range of nutrients and micronutrients to feed microbial growth. Mixing the biochar and the microbial soil inoculant (packaged separately) activates the microbial communities and enhances soil structure to boost the availability and uptake of plant nutrients. A cubic foot box is sufficient for: – Planting 60 new bare-root trees or amending existing trees – Amending 175 square feet of new garden beds or 600 square feet of existing garden beds – Recharging and enhancing 40-80 gallons of finished compost 

Buy Our Probiotic Biochar Soil Amendment &
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