A newly developed “enriched biochar”, which combines a purified form of charcoal with fungi, seaweed and worm casts could help ash trees resist the Chalara disease, according to research by tree and shrub care company Bartlett Tree Experts.
A study by the company’s research labs on 2,000 established ash trees over three years in Essex found that while a third of the established trees monitored have become infected with Chalara, none of the 20 trees which had enriched biochar applied to their roots were hit.
The Guardian: Natural soil treatment 'could help trees resist ash dieback'
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