1. IntroductionBiochar is the charcoal obtained by the pyrolysis of biomass, i.e.,by incomplete thermal decomposition of organic material underlow oxygen conditions at relatively low temperatures (<70 0C).Unlike charcoal and similar materials, biochar is produced with theaim of being used as a soil amendment (Lehmann and Joseph,20 09). However, biochar is a more stable solid than the commonorganic conditioners, due to its very low degradation rate which isestimated as several hundred years for total degradation. Thus, its
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