Please find the attached article here. If you wanna some more specific answer, then please tell me where you want apply this biochar. For soil application you may use the recommended time and temperature is given in this article. Your most welcome for another query for this topic.
But i dont have reactor to set the temperature. I want to produce the biochar in tradition. i dont have any developed any equipment for trace the temperature of combustion of raw material. what I do in your idea?
I understand your problem. But you must have to follow some recommended method of biochar preparation. Because biochar property is fully depend on the biomass type and their response against pyrolysis temperature, time and environment. Please see upon this link for some traditional type of kilns and stoves for biochar preparation, that's may make your problem easy.