It is observed that the chemical-physical characteristics of the two manures, coming from two different sheds are
very different, especially with respect to the volatile matter and moisture content. One possible explanation is due to
different poultry farming conditions carried out: indeed, both are farms with livestock buildings at the ground, with
wood shavings used as litter and animals free to move inside to the sheds, but while manure 1 is collected from
poultry meat breeding, manure 2 belongs to breeding used for the production of biological eggs.