With the development of small-scale equipment forbiomass conversion, the vast area of agricultural waste hasbecome a potential source of charcoal. In this sense, wastesmean the leftovers from plantation harvesting or thedischarge from processors of agricultural crops
Experimental development and pilot-plant tests withthese materials started before the Second World WarCommercial exploitation of the research results began onlyin 1950 in the U.S.A. The list of the agricultural residueswhich have been successfully tried in the meantime comprisesmore than forty different raw materials. They can be grouped
as follows:
---husks and shells of nuts
---plantation residues from coffee, cotton, papaya andorchards
---discharges from farm cropping and food processing