Noun
biochar (countable and uncountable, plural biochars)
Charcoal that is used as a soil conditioner.
“The value of the new research is that manure can be a problem source, and anaerobic digestion using biochar serves to dispose of manure while producing methane to power the farm and possibly be sold to local utilities,” he said. Source: Internet
In other parts of the world, biochar has shown that it can improve soil fertility while helping to reduce the negative impact of chemicals on the environment. Source: Internet